Whispering pectoriloquy is a phenomenon that occurs when there is lung consolidation. It is characterized by an amplified and clearer sound of whispering that can be heard when using a stethoscope to listen to the affected areas of the lungs. To conduct the test, patients are usually instructed to whisper the phrase ninety-nine.

Acute kidney injury (AKI), previously known as acute renal failure, is a sudden decline in kidney function. This leads to the accumulation of urea and other waste products in the body, as well as disturbances in fluid balance and electrolyte levels. AKI can occur in individuals with previously normal kidney function or those with pre-existing kidney disease, known as acute-on-chronic kidney disease. It is a relatively common condition, with approximately 15% of adults admitted to hospitals in the UK developing AKI.

AKI is categorized into three stages based on specific criteria. In stage 1, there is a rise in creatinine levels of 26 micromol/L or more within 48 hours, or a rise of 50-99% from baseline within 7 days (1.5-1.99 times the baseline). Additionally, a urine output of less than 0.5 mL/kg/hour for more than 6 hours is indicative of stage 1 AKI.

Stage 2 AKI is characterized by a creatinine rise of 100-199% from baseline within 7 days (2.0-2.99 times the baseline), or a urine output of less than 0.5 mL/kg/hour for more than 12 hours.

In stage 3 AKI, there is a creatinine rise of 200% or more from baseline within 7 days (3.0 or more times the baseline). Alternatively, a creatinine rise to 354 micromol/L or more with an acute rise of 26 micromol/L or more within 48 hours, or a rise of 50% or more within 7 days, is indicative of stage 3 AKI. Additionally, a urine output of less than 0.3 mL/kg/hour for 24 hours or anuria (no urine output) for 12 hours also falls under stage 3 AKI.

In order to gain a comprehensive understanding of AF management, it is crucial to familiarize oneself with the terminology used to describe its various subtypes. These terms help categorize different episodes of AF based on their characteristics and outcomes.

Acute AF refers to any episode that occurs within the previous 48 hours. It can manifest with or without symptoms and may or may not recur. On the other hand, paroxysmal AF describes episodes that spontaneously end within 7 days, typically within 48 hours. While these episodes are often recurrent, they can progress into a sustained form of AF.

Recurrent AF is defined as experiencing two or more episodes of AF. If the episodes self-terminate, they are classified as paroxysmal AF. However, if the episodes do not self-terminate, they are categorized as persistent AF. Persistent AF lasts longer than 7 days or has occurred after a previous cardioversion. To terminate persistent AF, electrical or pharmacological intervention is required. In some cases, persistent AF can progress into permanent AF.

Permanent AF, also known as Accepted AF, refers to episodes that cannot be successfully terminated, have relapsed after termination, or where cardioversion is not pursued. This subtype signifies a more chronic and ongoing form of AF.

By understanding and utilizing these terms, healthcare professionals can effectively communicate and manage the different subtypes of AF.

This patient is displaying symptoms that are characteristic of normal-pressure hydrocephalus (NPH). NPH is a type of communicating hydrocephalus where the pressure inside the skull, as measured through lumbar puncture, is either normal or occasionally elevated. It primarily affects elderly individuals, and the likelihood of developing NPH increases with age.

Around 50% of NPH cases are idiopathic, meaning that no clear cause can be identified. The remaining cases are secondary to various conditions such as head injury, meningitis, subarachnoid hemorrhage, central nervous system tumors, and radiotherapy.

The typical presentation of NPH includes a classic triad of symptoms: gait disturbance (often characterized by a broad-based and shuffling gait), sphincter disturbance leading to incontinence (usually urinary incontinence), and progressive dementia with memory loss, inattention, inertia, and bradyphrenia.

Diagnosing NPH primarily relies on identifying the classic clinical triad mentioned above. Additional investigations can provide supportive evidence and may involve CT and MRI scans, which reveal enlarged ventricles and periventricular lucency. Lumbar puncture can also be performed to assess cerebrospinal fluid (CSF) levels, which are typically normal or intermittently elevated. Intraventricular monitoring may show beta waves present for more than 5% of a 24-hour period.

NPH is one of the few reversible causes of dementia, making early recognition and treatment crucial. Medical treatment options include the use of carbonic anhydrase inhibitors (such as acetazolamide) and repeated lumbar punctures as temporary measures. However, the definitive treatment for NPH involves surgically inserting a cerebrospinal fluid (CSF) shunt. This procedure provides lasting clinical benefits for 70% to 90% of patients compared to their pre-operative state.

This child’s medical history and chest X-ray findings are indicative of an inhaled foreign object. Upon careful examination, it is evident that the left lung appears more transparent than the right lung, and the foreign body is lodged in the left tracheobronchial tree.

Airway foreign bodies in children can be life-threatening, and it is important to consider this diagnosis when young children experience unexplained difficulty breathing and wheezing. Unfortunately, there is often a delay in diagnosing this condition.

Foreign objects typically get stuck in the right tracheobronchial tree because the right main bronchus is wider, shorter, and more vertically positioned compared to the left main bronchus. However, they can become lodged anywhere in the tracheobronchial tree.

While there is often a history of choking prior to the symptoms, this is not always the case. Any history of running with objects in the mouth or being in close proximity to small objects that can be placed in the mouth can provide important clues. In the absence of a choking history, clinical features may include paroxysmal coughing, unexplained difficulty breathing, changes in voice, poor appetite, irritability, decreased breath sounds on one side, and localized wheezing.

To aid in diagnosis, a chest X-ray should be taken during expiration as it can accentuate any differences between the two lungs. The following findings may be observed: the normal lung may appear smaller and denser than the affected lung, the affected lung may appear excessively transparent and overinflated, and a radio-opaque foreign object may be visible. However, it is important to note that approximately 35% of patients may have a normal chest X-ray.

Bronchoscopy is considered the gold-standard test for diagnosing tracheobronchial foreign bodies. This procedure not only confirms the presence of a foreign object but also allows for potential retrieval.

Possible complications of this condition include pneumonia, atelectasis (collapsed lung), bronchospasm (constriction of the airways), pneumothorax (collapsed lung due to air leakage), broncho-oesophageal fistula (abnormal connection between the bronchial tubes and the esophagus), and bronchiectasis (permanent dilation of the bronchial tubes).

Children with severe croup require high flow oxygen and nebulized adrenaline as part of their treatment. If a child is agitated or lethargic, it is a sign that the disease is severe. In addition to standard steroid treatment, high flow oxygen and nebulized adrenaline are necessary for treating severe croup. It is important to note that beta 2 agonists are not effective for children under 2 years old.

Further Reading:

Croup, also known as laryngotracheobronchitis, is a respiratory infection that primarily affects infants and toddlers. It is characterized by a barking cough and can cause stridor (a high-pitched sound during breathing) and respiratory distress due to swelling of the larynx and excessive secretions. The majority of cases are caused by parainfluenza viruses 1 and 3. Croup is most common in children between 6 months and 3 years of age and tends to occur more frequently in the autumn.

The clinical features of croup include a barking cough that is worse at night, preceded by symptoms of an upper respiratory tract infection such as cough, runny nose, and congestion. Stridor, respiratory distress, and fever may also be present. The severity of croup can be graded using the NICE system, which categorizes it as mild, moderate, severe, or impending respiratory failure based on the presence of symptoms such as cough, stridor, sternal/intercostal recession, agitation, lethargy, and decreased level of consciousness. The Westley croup score is another commonly used tool to assess the severity of croup based on the presence of stridor, retractions, air entry, oxygen saturation levels, and level of consciousness.

In cases of severe croup with significant airway obstruction and impending respiratory failure, symptoms may include a minimal barking cough, harder-to-hear stridor, chest wall recession, fatigue, pallor or cyanosis, decreased level of consciousness, and tachycardia. A respiratory rate over 70 breaths per minute is also indicative of severe respiratory distress.

Children with moderate or severe croup, as well as those with certain risk factors such as chronic lung disease, congenital heart disease, neuromuscular disorders, immunodeficiency, age under 3 months, inadequate fluid intake, concerns about care at home, or high fever or a toxic appearance, should be admitted to the hospital. The mainstay of treatment for croup is corticosteroids, which are typically given orally. If the child is too unwell to take oral medication, inhaled budesonide or intramuscular dexamethasone may be used as alternatives. Severe cases may require high-flow oxygen and nebulized adrenaline.

When considering the differential diagnosis for acute stridor and breathing difficulty, non-infective causes such as inhaled foreign bodies

Hyperglycemia is a common occurrence in patients with phaeochromocytoma. This is primarily due to the excessive release of catecholamines, which suppress insulin secretion from the pancreas and promote glycogenolysis. Calcium levels in phaeochromocytoma patients can vary, with hypercalcemia being most frequently observed in cases where hyperparathyroidism coexists, particularly in MEN II. However, some phaeochromocytomas may secrete calcitonin and/or adrenomedullin, which can lower plasma calcium levels and lead to hypocalcemia. While not typical, potassium disturbances may occur in patients experiencing severe vomiting or acute kidney injury. On the other hand, anemia is not commonly associated with phaeochromocytoma, although there are rare cases where the tumor secretes erythropoietin, resulting in elevated hemoglobin levels and hematocrit.

Further Reading:

Phaeochromocytoma is a rare neuroendocrine tumor that secretes catecholamines. It typically arises from chromaffin tissue in the adrenal medulla, but can also occur in extra-adrenal chromaffin tissue. The majority of cases are spontaneous and occur in individuals aged 40-50 years. However, up to 30% of cases are hereditary and associated with genetic mutations. About 10% of phaeochromocytomas are metastatic, with extra-adrenal tumors more likely to be metastatic.

The clinical features of phaeochromocytoma are a result of excessive catecholamine production. Symptoms are typically paroxysmal and include hypertension, headaches, palpitations, sweating, anxiety, tremor, abdominal and flank pain, and nausea. Catecholamines have various metabolic effects, including glycogenolysis, mobilization of free fatty acids, increased serum lactate, increased metabolic rate, increased myocardial force and rate of contraction, and decreased systemic vascular resistance.

Diagnosis of phaeochromocytoma involves measuring plasma and urine levels of metanephrines, catecholamines, and urine vanillylmandelic acid. Imaging studies such as abdominal CT or MRI are used to determine the location of the tumor. If these fail to find the site, a scan with metaiodobenzylguanidine (MIBG) labeled with radioactive iodine is performed. The highest sensitivity and specificity for diagnosis is achieved with plasma metanephrine assay.

The definitive treatment for phaeochromocytoma is surgery. However, before surgery, the patient must be stabilized with medical management. This typically involves alpha-blockade with medications such as phenoxybenzamine or phentolamine, followed by beta-blockade with medications like propranolol. Alpha blockade is started before beta blockade to allow for expansion of blood volume and to prevent a hypertensive crisis.

The most suitable dosage of epinephrine for a patient experiencing anaphylaxis after a flu vaccination is 500 micrograms (0.5ml 1 in 1,000) adrenaline by intramuscular injection.

Anaphylaxis is a severe and life-threatening hypersensitivity reaction that can have sudden onset and progression. It is characterized by skin or mucosal changes and can lead to life-threatening airway, breathing, or circulatory problems. Anaphylaxis can be allergic or non-allergic in nature.

In allergic anaphylaxis, there is an immediate hypersensitivity reaction where an antigen stimulates the production of IgE antibodies. These antibodies bind to mast cells and basophils. Upon re-exposure to the antigen, the IgE-covered cells release histamine and other inflammatory mediators, causing smooth muscle contraction and vasodilation.

Non-allergic anaphylaxis occurs when mast cells degrade due to a non-immune mediator. The clinical outcome is the same as in allergic anaphylaxis.

The management of anaphylaxis is the same regardless of the cause. Adrenaline is the most important drug and should be administered as soon as possible. The recommended doses for adrenaline vary based on age. Other treatments include high flow oxygen and an IV fluid challenge. Corticosteroids and chlorpheniramine are no longer recommended, while non-sedating antihistamines may be considered as third-line treatment after initial stabilization of airway, breathing, and circulation.

Common causes of anaphylaxis include food (such as nuts, which is the most common cause in children), drugs, and venom (such as wasp stings). Sometimes it can be challenging to determine if a patient had a true episode of anaphylaxis. In such cases, serum tryptase levels may be measured, as they remain elevated for up to 12 hours following an acute episode of anaphylaxis.

The Resuscitation Council (UK) provides guidelines for the management of anaphylaxis, including a visual algorithm that outlines the recommended steps for treatment.
https://www.resus.org.uk/sites/default/files/2021-05/Emergency%20Treatment%20of%20Anaphylaxis%20May%202021_0.pdf

The drugs that have the highest association with the development of drug-induced lupus are procainamide and hydralazine. While some of the other medications mentioned in this question have also been reported to cause drug-induced lupus, the strength of their association is much weaker.

Vomiting after a head injury should raise concerns about increased intracranial pressure (ICP). Signs of elevated ICP include vomiting, changes in pupil size or shape in one eye, decreased cognitive function or consciousness, abnormal findings during fundoscopy (such as blurry optic discs or bleeding in the retina), cranial nerve dysfunction (most commonly affecting CN III and VI), weakness on one side of the body (a late sign), bradycardia (slow heart rate), high blood pressure, and a wide pulse pressure. Irregular breathing that may progress to respiratory distress, focal neurological deficits, and seizures can also be indicative of elevated ICP.

Further Reading:

Intracranial pressure (ICP) refers to the pressure within the craniospinal compartment, which includes neural tissue, blood, and cerebrospinal fluid (CSF). Normal ICP for a supine adult is 5-15 mmHg. The body maintains ICP within a narrow range through shifts in CSF production and absorption. If ICP rises, it can lead to decreased cerebral perfusion pressure, resulting in cerebral hypoperfusion, ischemia, and potentially brain herniation.

The cranium, which houses the brain, is a closed rigid box in adults and cannot expand. It is made up of 8 bones and contains three main components: brain tissue, cerebral blood, and CSF. Brain tissue accounts for about 80% of the intracranial volume, while CSF and blood each account for about 10%. The Monro-Kellie doctrine states that the sum of intracranial volumes is constant, so an increase in one component must be offset by a decrease in the others.

There are various causes of raised ICP, including hematomas, neoplasms, brain abscesses, edema, CSF circulation disorders, venous sinus obstruction, and accelerated hypertension. Symptoms of raised ICP include headache, vomiting, pupillary changes, reduced cognition and consciousness, neurological signs, abnormal fundoscopy, cranial nerve palsy, hemiparesis, bradycardia, high blood pressure, irregular breathing, focal neurological deficits, seizures, stupor, coma, and death.

Measuring ICP typically requires invasive procedures, such as inserting a sensor through the skull. Management of raised ICP involves a multi-faceted approach, including antipyretics to maintain normothermia, seizure control, positioning the patient with a 30º head up tilt, maintaining normal blood pressure, providing analgesia, using drugs to lower ICP (such as mannitol or saline), and inducing hypocapnoeic vasoconstriction through hyperventilation. If these measures are ineffective, second-line therapies like barbiturate coma, optimised hyperventilation, controlled hypothermia, or decompressive craniectomy may be considered.

The NICE recommendations for managing patients with suspected TIA are as follows:

– Offer aspirin (300 mg daily) to individuals who have experienced a suspected TIA, unless there are contraindications. This treatment should be started immediately.
– Immediately refer individuals who have had a suspected TIA for specialist assessment and investigation. They should be seen within 24 hours of the onset of symptoms.
– Avoid using scoring systems, such as ABCD2, to assess the risk of subsequent stroke or determine the urgency of referral for individuals with suspected or confirmed TIA.
– Provide secondary prevention measures, in addition to aspirin, as soon as possible after confirming the diagnosis of TIA.

The NICE recommendations for imaging in individuals with suspected TIA or acute non-disabling stroke are as follows:

– Do not offer CT brain scanning to individuals with suspected TIA, unless there is clinical suspicion of an alternative diagnosis that CT could detect.
– After a specialist assessment in the TIA clinic, consider performing an MRI (including diffusion-weighted and blood-sensitive sequences) to determine the area of ischemia, detect hemorrhage, or identify alternative pathologies. If an MRI is conducted, it should be done on the same day as the assessment.
– Carotid imaging is necessary for all individuals with TIA who, after specialist assessment, are considered candidates for carotid endarterectomy. This imaging should be done urgently.

For more information, refer to the NICE guidelines on stroke and transient ischaemic attack in individuals over 16 years old: diagnosis and initial management.

Antihistamines do not help in treating the life-threatening aspects of anaphylaxis and should not be used instead of adrenaline. However, they can be used to relieve symptoms such as skin reactions and itching once the patient’s condition has stabilized. The appropriate dose of cetirizine for children between the ages of 2 and 6 is 2.5-5 mg. It is important to note that chlorpheniramine is no longer recommended. The recommended doses of oral cetirizine for different age groups are as follows: less than 2 years – 250 micrograms/kg, 2-6 years – 2.5-5 mg, 6-11 years – 5-10 mg, 12 years and older – 10-20 mg.

Further Reading:

Anaphylaxis is a severe and life-threatening allergic reaction that affects the entire body. It is characterized by a rapid onset and can lead to difficulty breathing, low blood pressure, and loss of consciousness. In paediatrics, anaphylaxis is often caused by food allergies, with nuts being the most common trigger. Other causes include drugs and insect venom, such as from a wasp sting.

When treating anaphylaxis, time is of the essence and there may not be enough time to look up medication doses. Adrenaline is the most important drug in managing anaphylaxis and should be administered as soon as possible. The recommended doses of adrenaline vary based on the age of the child. For children under 6 months, the dose is 150 micrograms, while for children between 6 months and 6 years, the dose remains the same. For children between 6 and 12 years, the dose is increased to 300 micrograms, and for adults and children over 12 years, the dose is 500 micrograms. Adrenaline can be repeated every 5 minutes if necessary.

The preferred site for administering adrenaline is the anterolateral aspect of the middle third of the thigh. This ensures quick absorption and effectiveness of the medication. It is important to follow the Resuscitation Council guidelines for anaphylaxis management, as they have recently been updated.

In some cases, it can be challenging to determine if a patient had a true episode of anaphylaxis. In such cases, serum tryptase levels may be measured, as they remain elevated for up to 12 hours following an acute episode of anaphylaxis. This can help confirm the diagnosis and guide further management.

Overall, prompt recognition and administration of adrenaline are crucial in managing anaphylaxis in paediatrics. Following the recommended doses and guidelines can help ensure the best outcomes for patients experiencing this severe allergic reaction.

Verruca acuminata, also known as Condylomata acuminata, are genital warts. These warts are typically transmitted through sexual activity and are primarily caused by different subtypes of the human papillomavirus (HPV). They usually appear in clusters, can be pedunculated, and vary in size between 1-5 mm. Immunosuppression increases the risk, and some studies suggest that 25% of affected patients will acquire a second sexually transmitted infection.

Condylomata lata, on the other hand, are warty-plaque like lesions found on the genitals and perianal area during secondary syphilis.

Verruca vulgaris, commonly known as common warts, present as raised warts with a roughened surface. They are most frequently observed on the hands.

Verruca planae, which are smooth and flattened flesh-colored warts, can occur in large numbers. They are commonly seen on the face, hands, neck, wrists, and knees.

Lastly, Verruca plantaris, also known as plantar warts or verrucas, manifest as hard and painful lumps, often with black specks in the center. These warts are typically found only on pressure points on the soles of the feet.

The presence of borborygmi in the epigastrium can indicate that the endotracheal tube (ETT) is incorrectly placed in the esophagus. There are several ways to verify the correct placement of the endotracheal tube (ETT).

One method is through direct visualization, where the ETT is observed passing through the vocal cords. Another method is by checking for fogging in the ETT, which can indicate proper placement. Auscultation of bilateral equal breath sounds is also a reliable way to confirm correct ETT placement.

Additionally, the absence of borborygmi in the epigastrium is a positive sign that the ETT is in the correct position. Capnography or using a CO2 detector can provide further confirmation of proper ETT placement. Finally, chest radiography can be used to visually assess the placement of the endotracheal tube.

A needle cricothyroidotomy is a procedure used in emergency situations to provide oxygenation when intubation and oxygenation are not possible. It is typically performed when a patient cannot be intubated or oxygenated. There are certain conditions that make this procedure contraindicated, such as local infection, distorted anatomy, previous failed attempts, and swelling or mass lesions.

To perform a needle cricothyroidotomy, the necessary equipment should be assembled and prepared. The patient should be positioned supine with their neck in a neutral position. The neck should be cleaned in a sterile manner using antiseptic swabs. If time allows, the area should be anesthetized locally. A 12 or 14 gauge over-the-needle catheter should be assembled to a 10 mL syringe.

The cricothyroid membrane, located between the thyroid and cricoid cartilage, should be identified anteriorly. The trachea should be stabilized with the thumb and forefinger of one hand. Using the other hand, the skin should be punctured in the midline with the needle over the cricothyroid membrane. The needle should be directed at a 45° angle caudally while negative pressure is applied to the syringe. Needle aspiration should be maintained as the needle is inserted through the lower half of the cricothyroid membrane, with air aspiration indicating entry into the tracheal lumen.

Once the needle is in place, the syringe and needle should be removed while the catheter is advanced to the hub. The oxygen catheter should be attached and the airway secured. It is important to be aware of possible complications, such as technique failure, cannula obstruction or dislodgement, injury to local structures, and surgical emphysema if high flow oxygen is administered through a malpositioned cannula.

This individual is diagnosed with an acquired cholesteatoma, which is an expanding growth of the stratified keratinising epithelium in the middle ear. It develops due to dysfunction of the Eustachian tube and chronic otitis media caused by the retraction of the squamous elements of the tympanic membrane into the middle ear space.

The most important method for assessing the presence of a cholesteatoma is otoscopy. A retraction pocket observed in the attic or posterosuperior quadrant of the tympanic membrane is a characteristic sign of an acquired cholesteatoma. This is often accompanied by the presence of granulation tissue and squamous debris. The presence of a granular polyp within the ear canal also strongly suggests a cholesteatoma.

If left untreated, a cholesteatoma can lead to various complications including conductive deafness, facial nerve palsy, brain abscess, meningitis, and labyrinthitis. Therefore, it is crucial to urgently refer this individual to an ear, nose, and throat (ENT) specialist for a CT scan and surgical removal of the lesion.

Mandibular fractures are quite common, especially among young men. The most common cause of these fractures is assault, but they can also occur due to sporting injuries, motor vehicle accidents, and falls. The mandible and skull together form a complete bony ring, with the only interruption being the temporomandibular joints (TMJs). While it is expected that mandibular fractures would occur in two places, sometimes they only occur in one location. The most frequently affected areas are the angle of the mandible (27%), mandibular symphysis (21%), mandibular condylar and subcondylar (18%), body of the mandible (15%), ramus of the mandible (5%), coronoid process (1-3%), and alveolar ridge (2%).

Decompression sickness often presents with symptoms such as paraplegia, tetraplegia, or hemiplegia. In the emergency department, the most crucial intervention is providing high flow oxygen at a rate of 15 L/min through a non-rebreather mask. This should be administered to all patients, regardless of their oxygen saturations. The definitive treatment for decompression sickness involves recompression therapy in a hyperbaric oxygen chamber, which should be arranged promptly.

Further Reading:

Decompression illness (DCI) is a term that encompasses both decompression sickness (DCS) and arterial gas embolism (AGE). When diving underwater, the increasing pressure causes gases to become more soluble and reduces the size of gas bubbles. As a diver ascends, nitrogen can come out of solution and form gas bubbles, leading to decompression sickness or the bends. Boyle’s and Henry’s gas laws help explain the changes in gases during changing pressure.

Henry’s law states that the amount of gas that dissolves in a liquid is proportional to the partial pressure of the gas. Divers often use atmospheres (ATM) as a measure of pressure, with 1 ATM being the pressure at sea level. Boyle’s law states that the volume of gas is inversely proportional to the pressure. As pressure increases, volume decreases.

Decompression sickness occurs when nitrogen comes out of solution as a diver ascends. The evolved gas can physically damage tissue by stretching or tearing it as bubbles expand, or by provoking an inflammatory response. Joints and spinal nervous tissue are commonly affected. Symptoms of primary damage usually appear immediately or soon after a dive, while secondary damage may present hours or days later.

Arterial gas embolism occurs when nitrogen bubbles escape into the arterial circulation and cause distal ischemia. The consequences depend on where the embolism lodges, ranging from tissue ischemia to stroke if it lodges in the cerebral arterial circulation. Mechanisms for distal embolism include pulmonary barotrauma, right to left shunt, and pulmonary filter overload.

Clinical features of decompression illness vary, but symptoms often appear within six hours of a dive. These can include joint pain, neurological symptoms, chest pain or breathing difficulties, rash, vestibular problems, and constitutional symptoms. Factors that increase the risk of DCI include diving at greater depth, longer duration, multiple dives close together, problems with ascent, closed rebreather circuits, flying shortly after diving, exercise shortly after diving, dehydration, and alcohol use.

Diagnosis of DCI is clinical, and investigations depend on the presentation. All patients should receive high flow oxygen, and a low threshold for ordering a chest X-ray should be maintained. Hydration is important, and IV fluids may be necessary. Definitive treatment is recompression therapy in a hyperbaric oxygen chamber, which should be arranged as soon as possible. Entonox should not be given, as it will increase the pressure effect in air spaces.

Nasal cautery is a suitable option for patients who are experiencing epistaxis (nosebleeds) and have not responded to initial measures. It is particularly effective when a specific bleeding point in the anterior nasal septum (known as Little’s area) has been identified. This procedure is recommended for adult patients who have already undergone an appropriate period of nasal pressure application (10-15 minutes). It is important to note that naseptin or mupirocin should not be used to control active bleeding, but rather after the bleeding has been successfully managed. Nasal packing, on the other hand, is a more invasive procedure that requires hospital admission and is typically reserved for cases where the bleeding point cannot be visualized or when cautery has been unsuccessful.

Further Reading:

Epistaxis, or nosebleed, is a common condition that can occur in both children and older adults. It is classified as either anterior or posterior, depending on the location of the bleeding. Anterior epistaxis usually occurs in younger individuals and arises from the nostril, most commonly from an area called Little’s area. These bleeds are usually not severe and account for the majority of nosebleeds seen in hospitals. Posterior nosebleeds, on the other hand, occur in older patients with conditions such as hypertension and atherosclerosis. The bleeding in posterior nosebleeds is likely to come from both nostrils and originates from the superior or posterior parts of the nasal cavity or nasopharynx.

The management of epistaxis involves assessing the patient for signs of instability and implementing measures to control the bleeding. Initial measures include sitting the patient upright with their upper body tilted forward and their mouth open. Firmly pinching the cartilaginous part of the nose for 10-15 minutes without releasing the pressure can also help stop the bleeding. If these measures are successful, a cream called Naseptin or mupirocin nasal ointment can be prescribed for further treatment.

If bleeding persists after the initial measures, nasal cautery or nasal packing may be necessary. Nasal cautery involves using a silver nitrate stick to cauterize the bleeding point, while nasal packing involves inserting nasal tampons or inflatable nasal packs to stop the bleeding. In cases of posterior bleeding, posterior nasal packing or surgery to tie off the bleeding vessel may be considered.

Complications of epistaxis can include nasal bleeding, hypovolemia, anemia, aspiration, and even death. Complications specific to nasal packing include sinusitis, septal hematoma or abscess, pressure necrosis, toxic shock syndrome, and apneic episodes. Nasal cautery can lead to complications such as septal perforation and caustic injury to the surrounding skin.

In children under the age of 2 presenting with epistaxis, it is important to refer them for further investigation as an underlying cause is more likely in this age group.

Infantile hypertrophic pyloric stenosis is a condition characterized by the thickening and enlargement of the smooth muscle in the antrum of the stomach, leading to the narrowing of the pyloric canal. This narrowing can easily cause obstruction. It is a relatively common condition, occurring in about 1 in 500 live births, and is more frequently seen in males than females, with a ratio of 4 to 1. It is most commonly observed in first-born male children, although it can rarely occur in adults as well.

The main symptom of infantile hypertrophic pyloric stenosis is vomiting, which typically begins between 2 to 8 weeks of age. The vomit is usually non-bilious and forcefully expelled. It tends to occur around 30 to 60 minutes after feeding, leaving the baby hungry despite the vomiting. In some cases, there may be blood in the vomit. Other clinical features include persistent hunger, dehydration, weight loss, and constipation. An enlarged pylorus, often described as olive-shaped, can be felt in the right upper quadrant or epigastric in approximately 95% of cases. This is most noticeable at the beginning of a feed.

The typical acid-base disturbance seen in this condition is hypochloremic metabolic alkalosis. This occurs due to the loss of hydrogen and chloride ions in the vomit, as well as decreased secretion of pancreatic bicarbonate. The increased bicarbonate ions in the distal tubule of the kidney lead to the production of alkaline urine. Hyponatremia and hypokalemia are also commonly present.

Ultrasound scanning is the preferred diagnostic tool for infantile hypertrophic pyloric stenosis, as it is reliable and easy to perform. It has replaced barium studies as the investigation of choice.

Initial management involves fluid resuscitation, which should be tailored to the weight and degree of dehydration. Any electrolyte imbalances should also be corrected.

The definitive treatment for this condition is surgical intervention, with the Ramstedt pyloromyotomy being the procedure of choice. Laparoscopic pyloromyotomy is also an effective alternative if suitable facilities are available. The prognosis for infants with this condition is excellent, as long as there is no delay in diagnosis and treatment initiation.

Vestibular neuronitis does not typically cause hearing loss, tinnitus, or focal neurological deficits. However, it is characterized by the presence of nystagmus, which is a rapid, involuntary eye movement. In vestibular neuronitis, nystagmus is usually fine horizontal or mixed horizontal-torsional. It consistently beats in the same direction, regardless of head rotation, and can be reduced when focusing on a fixed point.

Further Reading:

Vestibular neuritis, also known as vestibular neuronitis, is a condition characterized by sudden and prolonged vertigo of peripheral origin. It is believed to be caused by inflammation of the vestibular nerve, often following a viral infection. It is important to note that vestibular neuritis and labyrinthitis are not the same condition, as labyrinthitis involves inflammation of the labyrinth. Vestibular neuritis typically affects individuals between the ages of 30 and 60, with a 1:1 ratio of males to females. The annual incidence is approximately 3.5 per 100,000 people, making it one of the most commonly diagnosed causes of vertigo.

Clinical features of vestibular neuritis include nystagmus, which is a rapid, involuntary eye movement, typically in a horizontal or horizontal-torsional direction away from the affected ear. The head impulse test may also be positive. Other symptoms include spontaneous onset of rotational vertigo, which is worsened by changes in head position, as well as nausea, vomiting, and unsteadiness. These severe symptoms usually last for 2-3 days, followed by a gradual recovery over a few weeks. It is important to note that hearing is not affected in vestibular neuritis, and symptoms such as tinnitus and focal neurological deficits are not present.

Differential diagnosis for vestibular neuritis includes benign paroxysmal positional vertigo (BPPV), labyrinthitis, Meniere’s disease, migraine, stroke, and cerebellar lesions. Management of vestibular neuritis involves drug treatment for nausea and vomiting associated with vertigo, typically through short courses of medication such as prochlorperazine or cyclizine. If symptoms are severe and fluids cannot be tolerated, admission and administration of IV fluids may be necessary. General advice should also be given, including avoiding driving while symptomatic, considering the suitability to work based on occupation and duties, and the increased risk of falls. Follow-up is required, and referral is necessary if there are atypical symptoms, symptoms do not improve after a week of treatment, or symptoms persist for more than 6 weeks.

The prognosis for vestibular neuritis is generally good, with the majority of individuals fully recovering within 6 weeks. Recurrence is thought to occur in 2-11% of cases, and approximately 10% of individuals may develop BPPV following an episode of vestibular neuritis. A very rare complication of vestibular neuritis is ph

When addressing the management of long-term alcohol abuse and promoting self-care, it is important to start by exploring the reasons behind the patient’s previous relapses. This will help understand her beliefs and understanding of her condition and identify any simple, supportive measures that can aid in her efforts to stop drinking.

Referral to the Community Drug and Alcohol Team (CDAT) may be necessary at some point. Depending on the severity and duration of her alcohol abuse, she may be suitable for outpatient or community detox. However, if her drinking has been sustained and heavy for many years, she may require admission for additional support. It is important to note that there is often a long wait for available beds, so it would be more prudent to thoroughly explore her history before making this referral.

While arranging for her liver function to be tested could be part of the general work-up, it is unlikely to be necessary for a leg laceration. It is crucial to avoid suddenly abstaining or prescribing chlordiazepoxide, as these actions can be potentially dangerous. Abrupt detoxification may lead to delirium tremens, which can have catastrophic effects. Chlordiazepoxide may be used under the supervision of experienced professionals, but close monitoring and regular appointments with a GP or specialist are essential.

Retinal detachment is a condition where the retina separates from the retinal pigment epithelium, resulting in a fluid-filled space between them. This case presents a classic description of retinal detachment. Several risk factors increase the likelihood of developing this condition, including myopia, being male, having a family history of retinal detachment, previous episodes of retinal detachment, blunt ocular trauma, previous cataract surgery, diabetes mellitus (especially if proliferative retinopathy is present), glaucoma, and cataracts.

The clinical features commonly associated with retinal detachment include flashes of light, particularly at the edges of vision (known as photopsia), a dense shadow in the peripheral vision that spreads towards the center, a sensation of a curtain drawing across the eye, and central visual loss. Fundoscopy, a procedure to examine the back of the eye, reveals a sheet of sensory retina billowing towards the center of the eye. Additionally, a positive Amsler grid test, where straight lines appear curved or wavy, may indicate retinal detachment.

Other possible causes of floaters include posterior vitreous detachment, retinal tears, vitreous hemorrhage, and migraine with aura. However, in this case, the retinal appearance described is consistent with retinal detachment.

It is crucial to arrange an urgent same-day ophthalmology referral for this patient. Fortunately, approximately 90% of retinal detachments can be successfully repaired with one operation, and an additional 6% can be salvaged with subsequent procedures. If the retina remains fixed six months after surgery, the likelihood of it becoming detached again is low.

Sexually transmitted eye infections can be quite severe and are often characterized by prolonged mucopurulent discharge. The two main causes of these infections are Chlamydia trachomatis and Neisseria gonorrhoea. Differentiating between the two can be done by considering certain features.

Chlamydia trachomatis infection typically presents with chronic low-grade irritation and mucous discharge that lasts for more than two weeks in sexually active individuals. Pre-auricular lymphadenopathy, or swelling of the lymph nodes in front of the ear, may also be present. Most cases of this infection are unilateral, affecting only one eye, but there is a possibility of it being bilateral, affecting both eyes.

On the other hand, Neisseria gonorrhoea infection tends to develop rapidly, usually within 12 to 24 hours. It is characterized by copious mucopurulent discharge, swelling of the eyelids, and tender preauricular lymphadenopathy. This type of infection carries a higher risk of complications, such as uveitis, severe keratitis, and corneal perforation.

Based on the patient’s symptoms, it appears that they are more consistent with a Chlamydia trachomatis infection, especially considering the slower and more gradual onset of their symptoms.

There is ongoing debate regarding the most effective antibiotic treatment for these infections. Some options include topical tetracycline ointment to be applied four times a day for six weeks, oral doxycycline to be taken twice a day for one to two weeks, oral azithromycin with a single dose of 1 gram followed by 500 mg orally for two days, or oral erythromycin to be taken four times a day for one week.

Heat stroke is a condition characterized by a core temperature greater than 40.6°C, accompanied by changes in mental state and varying levels of organ dysfunction. There are two forms of heat stroke: classic non-exertional heat stroke, which occurs during high environmental temperatures and typically affects elderly patients during heat waves, and exertional heat stroke, which occurs during strenuous physical exercise in high environmental temperatures, such as endurance athletes competing in hot conditions.

Heat stroke happens when the body’s ability to regulate temperature is overwhelmed by a combination of excessive environmental heat, excessive production of heat from exertion, and inadequate heat loss. Several risk factors increase the likelihood of developing heat stroke, including hot and humid environmental conditions, age (particularly the elderly and infants), physical factors like obesity and excessive exertion, medical conditions like anorexia and cardiovascular disease, and certain medications such as alcohol, amphetamines, and diuretics.

The typical clinical features of heat stroke include a core temperature above 40.6°C, early symptoms like extreme fatigue, headache, syncope, facial flushing, vomiting, and diarrhea. The skin is usually hot and dry, although sweating may occur in around 50% of cases of exertional heat stroke. The loss of the ability to sweat is a late and concerning sign. Hyperventilation is almost always present. Heat stroke can also lead to cardiovascular dysfunction, respiratory dysfunction, central nervous system dysfunction, and potentially multi-organ failure, coagulopathy, and rhabdomyolysis if the temperature rises above 41.5°C.

Heat cramps, on the other hand, are characterized by intense thirst and muscle cramps. Body temperature is often elevated but typically remains below 40°C. Sweating, heat dissipation mechanisms, and cognition are preserved, and there is no neurological impairment. Heat exhaustion usually precedes heat stroke and if left untreated, can progress to heat stroke. Heat dissipation is still functioning, and the body temperature is usually below 41°C. Symptoms of heat exhaustion include nausea, oliguria, weakness, headache, thirst, and sinus tachycardia. Central nervous system functioning is usually largely preserved, and patients may complain of feeling hot and appear flushed and sweaty.

It is important to note that malignant hyperthermia and neuroleptic malignant syndrome are highly unlikely in this scenario as the patient has no recent history of a general anesthetic or taking phenothiazines or other antipsychotics, respectively.

According to the RCEM, the minimum time for cuff inflation during Bier’s block is 20 minutes, while the maximum time is 45 minutes.

Further Reading:

Bier’s block is a regional intravenous anesthesia technique commonly used for minor surgical procedures of the forearm or for reducing distal radius fractures in the emergency department (ED). It is recommended by NICE as the preferred anesthesia block for adults requiring manipulation of distal forearm fractures in the ED.

Before performing the procedure, a pre-procedure checklist should be completed, including obtaining consent, recording the patient’s weight, ensuring the resuscitative equipment is available, and monitoring the patient’s vital signs throughout the procedure. The air cylinder should be checked if not using an electronic machine, and the cuff should be checked for leaks.

During the procedure, a double cuff tourniquet is placed on the upper arm, and the arm is elevated to exsanguinate the limb. The proximal cuff is inflated to a pressure 100 mmHg above the systolic blood pressure, up to a maximum of 300 mmHg. The time of inflation and pressure should be recorded, and the absence of the radial pulse should be confirmed. 0.5% plain prilocaine is then injected slowly, and the time of injection is recorded. The patient should be warned about the potential cold/hot sensation and mottled appearance of the arm. After injection, the cannula is removed and pressure is applied to the venipuncture site to prevent bleeding. After approximately 10 minutes, the patient should have anesthesia and should not feel pain during manipulation. If anesthesia is successful, the manipulation can be performed, and a plaster can be applied by a second staff member. A check x-ray should be obtained with the arm lowered onto a pillow. The tourniquet should be monitored at all times, and the cuff should be inflated for a minimum of 20 minutes and a maximum of 45 minutes. If rotation of the cuff is required, it should be done after the manipulation and plaster application. After the post-reduction x-ray is satisfactory, the cuff can be deflated while observing the patient and monitors. Limb circulation should be checked prior to discharge, and appropriate follow-up and analgesia should be arranged.

There are several contraindications to performing Bier’s block, including allergy to local anesthetic, hypertension over 200 mm Hg, infection in the limb, lymphedema, methemoglobinemia, morbid obesity, peripheral vascular disease, procedures needed in both arms, Raynaud’s phenomenon, scleroderma, severe hypertension and sickle cell disease.

De Quervain’s tenosynovitis is a condition characterized by inflammation and thickening of the sheath that contains the tendons of the extensor pollicis brevis and abductor pollicis longus. This leads to pain on the radial side of the wrist. It is more commonly observed in women, particularly those aged between 30 and 50 years. The condition is often associated with repetitive activities that involve pinching and grasping.

During examination, swelling and tenderness along the tendon sheath may be observed. The tendon sheath itself may also appear thickened. The most pronounced tenderness is usually felt over the tip of the radial styloid. A positive Finkelstein’s test, which involves flexing the wrist and moving it towards the ulnar side while the thumb is flexed across the palm, can help confirm the diagnosis.

Treatment for De Quervain’s tenosynovitis involves avoiding movements that can trigger symptoms and using a thumb splint to immobilize the thumb. In cases where symptoms persist, a local corticosteroid injection or surgical decompression may be considered.

Delirium is characterized by fluctuating symptoms of disturbed consciousness that typically develop over hours to days. During the day, lucid intervals may occur, while the worst disturbances are often experienced at night. In contrast, dementia has a gradual onset and does not involve fluctuations in mental state. Stroke, on the other hand, is associated with focal neurological deficits.

Further Reading:

Delirium is an acute syndrome that causes disturbances in consciousness, attention, cognition, and perception. It is also known as an acute confusional state. The DSM-IV criteria for diagnosing delirium include recent onset of fluctuating awareness, impairment of memory and attention, and disorganized thinking. Delirium typically develops over hours to days and may be accompanied by behavioral changes, personality changes, and psychotic features. It often occurs in individuals with predisposing factors, such as advanced age or multiple comorbidities, when exposed to new precipitating factors, such as medications or infection. Symptoms of delirium fluctuate throughout the day, with lucid intervals occurring during the day and worse disturbances at night. Falling and loss of appetite are often warning signs of delirium.

Delirium can be classified into three subtypes based on the person’s symptoms. Hyperactive delirium is characterized by inappropriate behavior, hallucinations, and agitation. Restlessness and wandering are common in this subtype. Hypoactive delirium is characterized by lethargy, reduced concentration, and appetite. The person may appear quiet or withdrawn. Mixed delirium presents with signs and symptoms of both hyperactive and hypoactive subtypes.

The exact pathophysiology of delirium is not fully understood, but it is believed to involve multiple mechanisms, including cholinergic deficiency, dopaminergic excess, and inflammation. The cause of delirium is usually multifactorial, with predisposing factors and precipitating factors playing a role. Predisposing factors include older age, cognitive impairment, frailty, significant injuries, and iatrogenic events. Precipitating factors include infection, metabolic or electrolyte disturbances, cardiovascular disorders, respiratory disorders, neurological disorders, endocrine disorders, urological disorders, gastrointestinal disorders, severe uncontrolled pain, alcohol intoxication or withdrawal, medication use, and psychosocial factors.

Delirium is highly prevalent in hospital settings, affecting up to 50% of inpatients aged over 65 and occurring in 30% of people aged over 65 presenting to the emergency department. Complications of delirium include increased risk of death, high in-hospital mortality rates, higher mortality rates following hospital discharge, increased length of stay in hospital, nosocomial infections, increased risk of admission to long-term care or re-admission to hospital, increased incidence of dementia, increased risk of falls and associated injuries, pressure sores.

This presentation strongly suggests a diagnosis of whooping cough, which is an infection of the upper respiratory tract caused by the bacteria Bordetella pertussis. The disease is highly contagious and is transmitted through respiratory droplets. The incubation period is typically 7-21 days, and it is estimated that about 90% of close household contacts will become infected.

The clinical course of whooping cough can be divided into two stages. The first stage, known as the catarrhal stage, is similar to a mild respiratory infection with symptoms such as low-grade fever and a runny nose. A cough may be present, but it is usually not as severe as in the second stage. This phase typically lasts about a week.

The second stage, called the paroxysmal stage, is characterized by the development of a distinctive cough. The coughing occurs in spasms, often preceded by an inspiratory whoop sound. These spasms are followed by a series of rapid, hacking coughs. Patients may also experience vomiting and develop subconjunctival hemorrhages and petechiae. Between spasms, patients generally feel well and there are usually no abnormal chest findings. This stage can last up to 3 months, with a gradual recovery over this period. The later stages of this phase are sometimes referred to as the convalescent stage.

Complications of whooping cough can include secondary pneumonia, rib fractures, pneumothorax, hernias, syncopal episodes, encephalopathy, and seizures.

Public Health England (PHE) has specific recommendations for testing for whooping cough based on the age of the patient, the time since onset of illness, and the severity of the presentation.

For infants under 12 months of age, hospitalized patients should be tested using PCR testing. Non-hospitalized patients within two weeks of onset should be investigated with culture of a nasopharyngeal swab or aspirate. Non-hospitalized patients presenting over two weeks after onset should be tested using serology for anti-pertussis toxin IgG antibody levels.

For children over 12 months of age and adults, patients within two weeks of onset should be tested using culture of a nasopharyngeal swab or aspirate. Patients aged 5 to 16 who have not received the vaccine within the last year and present over two weeks after onset should have oral fluid testing for anti-pertussis toxin IgG antibody levels.

Based on the clinical history and examination, it strongly indicates that the patient has developed a pulmonary embolism due to a deep vein thrombosis in his right leg.

The symptoms commonly associated with a pulmonary embolism include shortness of breath, pleuritic chest pain, coughing, and/or coughing up blood. These symptoms may also suggest the presence of a deep vein thrombosis. Other clinical features that may be observed are rapid breathing and heart rate, fever, and in severe cases, signs of systemic shock, a gallop heart rhythm, and increased jugular venous pressure.

Acute lymphoblastic leukaemia (ALL) is the most common type of leukaemia that occurs in childhood, typically affecting children between the ages of 2 and 5 years. The symptoms of ALL can vary, but many children initially experience an acute illness that may resemble a common cold or viral infection. Other signs of ALL include general weakness and fatigue, as well as muscle, joint, and bone pain. Additionally, children with ALL may have anaemia, unexplained bruising and petechiae, swelling (oedema), enlarged lymph nodes (lymphadenopathy), and an enlarged liver and spleen (hepatosplenomegaly).

In patients with ALL, a complete blood count typically reveals certain characteristics. These include anaemia, which can be either normocytic or macrocytic. Approximately 50% of patients with ALL have a low white blood cell count (leukopaenia), with a white cell count below 4 x 109/l. On the other hand, around 60% of patients have a high white blood cell count (leukocytosis), with a white cell count exceeding 10 x 109/l. In about 25% of cases, there is an extreme elevation in white blood cell count (hyperleukocytosis), with a count surpassing 50 x 109/l. Additionally, patients with ALL often have a low platelet count (thrombocytopaenia).

Lidocaine is a tertiary amine that is primarily utilized as a local anesthetic. It can also be employed in the treatment of ventricular arrhythmias. The mechanism of action of lidocaine as a local anesthetic involves its diffusion in the form of an uncharged base through neural sheaths and the axonal membrane. It then reaches the internal surface of the cell membrane sodium channels, where it exerts its effect by blocking the fast voltage-gated sodium channels. This alteration in signal conduction prevents the depolarization of the postsynaptic neuron’s membrane, thereby inhibiting the transmission of pain signals.

In a plain 1% lidocaine solution, each 1 ml contains 10 mg of lidocaine hydrochloride. The maximum safe dose of plain lidocaine is 3 mg/kg, with a maximum limit of 200 mg. However, when administered with adrenaline in a 1:200,000 ratio, the maximum safe dose increases to 7 mg/kg, with a maximum limit of 500 mg. It is important to note that the combination of lidocaine and adrenaline should not be used in extremities such as fingers, toes, and the nose due to the risk of vasoconstriction and tissue necrosis.

The half-life of lidocaine ranges from 1.5 to 2 hours. It exhibits a rapid onset of action within a few minutes and has a duration of action of 30 to 60 minutes when used alone. However, when co-administered with adrenaline, its duration of action is prolonged. It is worth mentioning that lidocaine tends to induce vasodilation, primarily attributed to the inhibition of action potentials in vasoconstrictor sympathetic nerves through the blocking of sodium channels.

To prevent diffusion hypoxia, it is recommended to administer supplemental oxygen to patients for about 5 minutes after discontinuing nitrous oxide. This is important because there is a risk of developing diffusion hypoxia after the termination of nitrous oxide.

Further Reading:

Entonox® is a mixture of 50% nitrous oxide and 50% oxygen that can be used for self-administration to reduce anxiety. It can also be used alongside other anesthesia agents. However, its mechanism of action for anxiety reduction is not fully understood. The Entonox bottles are typically identified by blue and white color-coded collars, but a new standard will replace these with dark blue shoulders in the future. It is important to note that Entonox alone cannot be used as the sole maintenance agent in anesthesia.

One of the effects of nitrous oxide is the second-gas effect, where it speeds up the absorption of other inhaled anesthesia agents. Nitrous oxide enters the alveoli and diffuses into the blood, displacing nitrogen. This displacement causes the remaining alveolar gases to become more concentrated, increasing the fractional content of inhaled anesthesia gases and accelerating the uptake of volatile agents into the blood.

However, when nitrous oxide administration is stopped, it can cause diffusion hypoxia. Nitrous oxide exits the blood and diffuses back into the alveoli, while nitrogen diffuses in the opposite direction. Nitrous oxide enters the alveoli much faster than nitrogen leaves, resulting in the dilution of oxygen within the alveoli. This can lead to diffusion hypoxia, where the oxygen concentration in the alveoli is diluted, potentially causing oxygen deprivation in patients breathing air.

There are certain contraindications for using nitrous oxide, as it can expand in air-filled spaces. It should be avoided in conditions such as head injuries with intracranial air, pneumothorax, recent intraocular gas injection, and entrapped air following a recent underwater dive.

ACE inhibitors work by inhibiting the conversion of angiotensin I to angiotensin II. As a result, the effects of angiotensin II are reduced, leading to the dilation of vascular smooth muscle and the efferent arteriole of the glomerulus. This, in turn, has several effects on renal measurements. Firstly, it causes an increase in renal plasma flow. Secondly, it leads to a decrease in filtration fraction. Lastly, it results in a decrease in glomerular filtration rate.

Early assessment of the airway is a critical aspect of managing a burned patient. Airway obstruction can occur rapidly due to direct injury or swelling from the burn. If there is a history of trauma, the airway should be evaluated while maintaining cervical spine control.

There are several risk factors for airway obstruction in burned patients, including inhalation injury, soot in the mouth or nostrils, singed nasal hairs, burns to the head, face, and neck, burns inside the mouth, large burn area and increasing burn depth, associated trauma, and a carboxyhemoglobin level above 10%.

In cases where significant swelling is anticipated, it may be necessary to urgently secure the airway with an uncut endotracheal tube before the swelling becomes severe. Delaying recognition of impending airway obstruction can make intubation difficult, and a surgical airway may be required.

The American Burn Life Support (ABLS) guidelines recommend early intubation in certain situations. These include signs of airway obstruction, extensive burns, deep facial burns, burns inside the mouth, significant swelling or risk of swelling, difficulty swallowing, respiratory compromise, decreased level of consciousness, and anticipated transfer of a patient with a large burn and airway issues without qualified personnel to intubate during transport.

Circumferential burns of the neck can cause tissue swelling around the airway, making early intubation necessary in these cases as well.

Klumpke’s palsy, also known as Dejerine-Klumpke palsy, is a condition where the arm becomes paralyzed due to an injury to the lower roots of the brachial plexus. The most commonly affected root is C8, but T1 can also be involved. The main cause of Klumpke’s palsy is when the arm is pulled forcefully in an outward position during a difficult childbirth. It can also occur in adults with apical lung carcinoma (Pancoast’s syndrome).

Clinically, Klumpke’s palsy is characterized by a deformity known as ‘claw hand’, which is caused by the paralysis of the intrinsic hand muscles. There is also a loss of sensation along the ulnar side of the forearm and hand. In some cases where T1 is affected, a condition called Horner’s syndrome may also be present.

Klumpke’s palsy can be distinguished from Erb’s palsy, which affects the upper roots of the brachial plexus (C5 and sometimes C6). In Erb’s palsy, the arm hangs by the side with the elbow extended and the forearm turned inward (known as the ‘waiter’s tip sign’). Additionally, there is a loss of shoulder abduction, external rotation, and elbow flexion.

Beta blockers are the primary treatment for long QT syndrome (LQTS). This patient probably has an undiagnosed congenital LQTS because there is no obvious cause. If there is a known cause of LQTS that can be removed, removing it may be the only necessary treatment. However, in all other cases, beta blockers are usually needed to prevent ventricular arrhythmias. Ventricular arrhythmias happen because of increased adrenergic activity. Beta blockers reduce the effects of adrenergic stimulation.

Further Reading:

Long QT syndrome (LQTS) is a condition characterized by a prolonged QT interval on an electrocardiogram (ECG), which represents abnormal repolarization of the heart. LQTS can be either acquired or congenital. Congenital LQTS is typically caused by gene abnormalities that affect ion channels responsible for potassium or sodium flow in the heart. There are 15 identified genes associated with congenital LQTS, with three genes accounting for the majority of cases. Acquired LQTS can be caused by various factors such as certain medications, electrolyte imbalances, hypothermia, hypothyroidism, and bradycardia from other causes.

The normal QTc values, which represent the corrected QT interval for heart rate, are typically less than 450 ms for men and less than 460ms for women. Prolonged QTc intervals are considered to be greater than these values. It is important to be aware of drugs that can cause QT prolongation, as this can lead to potentially fatal arrhythmias. Some commonly used drugs that can cause QT prolongation include antimicrobials, antiarrhythmics, antipsychotics, antidepressants, antiemetics, and others.

Management of long QT syndrome involves addressing any underlying causes and using beta blockers. In some cases, an implantable cardiac defibrillator (ICD) may be recommended for patients who have experienced recurrent arrhythmic syncope, documented torsades de pointes, previous ventricular tachyarrhythmias or torsades de pointes, previous cardiac arrest, or persistent syncope. Permanent pacing may be used in patients with bradycardia or atrioventricular nodal block and prolonged QT. Mexiletine is a treatment option for those with LQT3. Cervicothoracic sympathetic denervation may be considered in patients with recurrent syncope despite beta-blockade or in those who are not ideal candidates for an ICD. The specific treatment options for LQTS depend on the type and severity of the condition.

The main sensory supply to the back of the scalp comes from the C2 and C3 cervical nerves. The scalp receives innervation from branches of both the trigeminal nerve and the cervical nerves, as depicted in the illustration in the notes. The C2 and C3 cervical nerves are primarily responsible for supplying sensation to the posterior scalp.

Further Reading:

The scalp is the area of the head that is bordered by the face in the front and the neck on the sides and back. It consists of several layers, including the skin, connective tissue, aponeurosis, loose connective tissue, and periosteum of the skull. These layers provide protection and support to the underlying structures of the head.

The blood supply to the scalp primarily comes from branches of the external carotid artery and the ophthalmic artery, which is a branch of the internal carotid artery. These arteries provide oxygen and nutrients to the scalp tissues.

The scalp also has a complex venous drainage system, which is divided into superficial and deep networks. The superficial veins correspond to the arterial branches and are responsible for draining blood from the scalp. The deep venous network is drained by the pterygoid venous plexus.

In terms of innervation, the scalp receives sensory input from branches of the trigeminal nerve and the cervical nerves. These nerves transmit sensory information from the scalp to the brain, allowing us to perceive touch, pain, and temperature in this area.

Full thickness burns are devoid of pain as they result in the complete destruction of the superficial nerve endings. These burns usually display characteristics such as a lack of sensation, a coloration of the burnt skin in shades of white, brown, or black, a texture that is waxy or leathery, and a dry appearance without any blistering.

Further Reading:

Burn injuries can be classified based on their type (degree, partial thickness or full thickness), extent as a percentage of total body surface area (TBSA), and severity (minor, moderate, major/severe). Severe burns are defined as a >10% TBSA in a child and >15% TBSA in an adult.

When assessing a burn, it is important to consider airway injury, carbon monoxide poisoning, type of burn, extent of burn, special considerations, and fluid status. Special considerations may include head and neck burns, circumferential burns, thorax burns, electrical burns, hand burns, and burns to the genitalia.

Airway management is a priority in burn injuries. Inhalation of hot particles can cause damage to the respiratory epithelium and lead to airway compromise. Signs of inhalation injury include visible burns or erythema to the face, soot around the nostrils and mouth, burnt/singed nasal hairs, hoarse voice, wheeze or stridor, swollen tissues in the mouth or nostrils, and tachypnea and tachycardia. Supplemental oxygen should be provided, and endotracheal intubation may be necessary if there is airway obstruction or impending obstruction.

The initial management of a patient with burn injuries involves conserving body heat, covering burns with clean or sterile coverings, establishing IV access, providing pain relief, initiating fluid resuscitation, measuring urinary output with a catheter, maintaining nil by mouth status, closely monitoring vital signs and urine output, monitoring the airway, preparing for surgery if necessary, and administering medications.

Burns can be classified based on the depth of injury, ranging from simple erythema to full thickness burns that penetrate into subcutaneous tissue. The extent of a burn can be estimated using methods such as the rule of nines or the Lund and Browder chart, which takes into account age-specific body proportions.

Fluid management is crucial in burn injuries due to significant fluid losses. Evaporative fluid loss from burnt skin and increased permeability of blood vessels can lead to reduced intravascular volume and tissue perfusion. Fluid resuscitation should be aggressive in severe burns, while burns <15% in adults and <10% in children may not require immediate fluid resuscitation. The Parkland formula can be used to calculate the intravenous fluid requirements for someone with a significant burn injury.

HELLP syndrome is a condition that occurs in approximately 0.5% of pregnancies. It is characterized by haemolysis, elevated liver enzymes, and a low platelet count. While it typically occurs in the late third trimester, it has also been reported in the late second trimester. Around 33% of patients with HELLP syndrome will present shortly after giving birth.

The initial symptoms of HELLP syndrome can be vague and include nausea, headaches, malaise, and pain in the upper right quadrant of the abdomen. Upon examination, raised blood pressure, proteinuria, and edema may be observed. Further investigations may reveal haemolysis on a blood film, elevated liver enzymes, low platelets, raised LDH, and raised bilirubin.

Delivery of the baby is the main treatment for HELLP syndrome. However, complications can arise, such as disseminated intravascular coagulation (DIC), renal failure, liver failure, and pulmonary edema. It is crucial to tightly control blood pressure, and magnesium sulfate is often used to reduce the risk of progression to eclampsia. If DIC occurs, treatment with fresh frozen plasma is necessary.

Without prompt recognition, approximately 25% of individuals with HELLP syndrome may experience severe complications, including placental abruption, liver failure, retinal detachment, and renal failure. With treatment, the mortality rate for the mother is around 1%, while the mortality rate for the baby ranges from 5-10%, depending on the gestational age at the time of delivery.

Septic arthritis occurs when an infectious agent invades a joint, causing it to become purulent. The main symptoms of septic arthritis include pain in the affected joint, redness, warmth, and swelling of the joint, and difficulty moving the joint. Patients may also experience fever and systemic upset. The most common cause of septic arthritis is Staphylococcus aureus, but other bacteria such as Streptococcus spp., Haemophilus influenzae, Neisseria gonorrhoea, and Escherichia coli can also be responsible.

According to the current recommendations by NICE and the BNF, the initial treatment for septic arthritis is flucloxacillin. However, if a patient is allergic to penicillin, clindamycin can be used instead. If there is a suspicion of MRSA infection, vancomycin is the recommended choice. In cases where gonococcal arthritis or a Gram-negative infection is suspected, cefotaxime is the preferred treatment. The suggested duration of treatment is typically 4-6 weeks, although it may be longer if the infection is complicated.

Spondylolysis refers to a flaw or fracture caused by stress in the pars interarticularis of the vertebral arch. While it can occur in the cervical vertebrae, it is most commonly found in the lower lumbar vertebrae, specifically L5. This injury is frequently seen in children and adolescents who engage in sports activities that place repetitive strain on the lower back, such as gymnastics, football, and weightlifting.

The administration of propofol can result in venodilation, leading to a significant drop in blood pressure. This effect is particularly significant in patients who are already experiencing unstable blood flow.

Further Reading:

There are four commonly used induction agents in the UK: propofol, ketamine, thiopentone, and etomidate.

Propofol is a 1% solution that produces significant venodilation and myocardial depression. It can also reduce cerebral perfusion pressure. The typical dose for propofol is 1.5-2.5 mg/kg. However, it can cause side effects such as hypotension, respiratory depression, and pain at the site of injection.

Ketamine is another induction agent that produces a dissociative state. It does not display a dose-response continuum, meaning that the effects do not necessarily increase with higher doses. Ketamine can cause bronchodilation, which is useful in patients with asthma. The initial dose for ketamine is 0.5-2 mg/kg, with a typical IV dose of 1.5 mg/kg. Side effects of ketamine include tachycardia, hypertension, laryngospasm, unpleasant hallucinations, nausea and vomiting, hypersalivation, increased intracranial and intraocular pressure, nystagmus and diplopia, abnormal movements, and skin reactions.

Thiopentone is an ultra-short acting barbiturate that acts on the GABA receptor complex. It decreases cerebral metabolic oxygen and reduces cerebral blood flow and intracranial pressure. The adult dose for thiopentone is 3-5 mg/kg, while the child dose is 5-8 mg/kg. However, these doses should be halved in patients with hypovolemia. Side effects of thiopentone include venodilation, myocardial depression, and hypotension. It is contraindicated in patients with acute porphyrias and myotonic dystrophy.

Etomidate is the most haemodynamically stable induction agent and is useful in patients with hypovolemia, anaphylaxis, and asthma. It has similar cerebral effects to thiopentone. The dose for etomidate is 0.15-0.3 mg/kg. Side effects of etomidate include injection site pain, movement disorders, adrenal insufficiency, and apnoea. It is contraindicated in patients with sepsis due to adrenal suppression.

Bronchiolitis is a short-term infection of the lower respiratory tract that primarily affects infants aged 2 to 6 months. It is commonly caused by a viral infection, with respiratory syncytial virus (RSV) being the most prevalent culprit. RSV infections are most prevalent during the winter months, typically occurring between November and March. In the UK, bronchiolitis is the leading cause of hospitalization among infants.

The typical symptoms of bronchiolitis include fever, difficulty breathing, coughing, poor feeding, irritability, apnoeas (more common in very young infants), and wheezing or fine inspiratory crackles. To confirm the diagnosis, a nasopharyngeal aspirate can be taken for RSV rapid testing. This test is useful in preventing unnecessary further testing and facilitating the isolation of the affected infant.

Most infants with acute bronchiolitis experience a mild, self-limiting illness that does not require hospitalization. Treatment primarily focuses on supportive measures, such as ensuring adequate fluid and nutritional intake and controlling the infant’s temperature. The illness typically lasts for 7 to 10 days.

However, hospital referral and admission are recommended in certain cases, including poor feeding (less than 50% of usual intake over the past 24 hours), lethargy, a history of apnoea, a respiratory rate exceeding 70 breaths per minute, nasal flaring or grunting, severe chest wall recession, cyanosis, oxygen saturations below 90% for children aged 6 weeks and over, and oxygen saturations below 92% for babies under 6 weeks or those with underlying health conditions.

If hospitalization is necessary, treatment involves supportive measures, supplemental oxygen, and nasogastric feeding as needed. There is limited or no evidence supporting the use of antibiotics, antivirals, bronchodilators, corticosteroids, hypertonic saline, or adrenaline nebulizers in the management of bronchiolitis.

Confidentiality plays a crucial role in the doctor-patient relationship and is vital for maintaining trust in the medical profession. However, there are certain situations, such as cases involving gun and knife crimes that pose a potential risk to the public, where it may be necessary to breach this confidentiality and provide information to the police, even if the patient refuses.

It is important to make every effort to obtain the patient’s consent, while also explaining your legal obligation to report such incidents. When sharing information with the police, it is essential to disclose only the minimum amount of information required. Typically, this would include the patient’s basic details and the fact that they have sought medical attention for a non-self-inflicted deliberate knife wound.

In some cases, where it is evident that the injury was accidental or a result of deliberate self-harm due to a mental health condition, there may be no need to involve the police. However, regardless of the circumstances, the necessary medical treatment should still be provided for the wound, as long as the patient gives their consent.

For more information on this topic, you can refer to the GMC Guidance on Reporting Gunshot and Knife Wounds.

Klebsiella pneumoniae is commonly observed in individuals who are dependent on alcohol. It is more prevalent in men compared to women and typically manifests after the age of 40.

The clinical manifestations of this condition include fevers and rigors, pleuritic chest pain, purulent sputum, and haemoptysis, which occurs more frequently than with other bacterial pneumonias. Klebsiella pneumoniae tends to affect the upper lobes of the lungs and often leads to the formation of cavitating lesions.

While Staphylococcus aureus can also cause cavitation, it usually affects multiple lobes and is not limited to the upper lobes. Other potential causes of cavitating pneumonia include Pseudomonas aeruginosa, Mycobacterium tuberculosis, and, although rare, Legionella pneumophila.

Glandular fever, also known as infectious mononucleosis or mono, is a clinical syndrome characterized by symptoms such as sore throat, fever, and swollen lymph nodes. It is primarily caused by the Epstein-Barr virus (EBV), with other viruses and infections accounting for the remaining cases. Glandular fever is transmitted through infected saliva and primarily affects adolescents and young adults. The incubation period is 4-8 weeks.

The majority of EBV infections are asymptomatic, with over 95% of adults worldwide having evidence of prior infection. Clinical features of glandular fever include fever, sore throat, exudative tonsillitis, lymphadenopathy, and prodromal symptoms such as fatigue and headache. Splenomegaly (enlarged spleen) and hepatomegaly (enlarged liver) may also be present, and a non-pruritic macular rash can sometimes occur.

Glandular fever can lead to complications such as splenic rupture, which increases the risk of rupture in the spleen. Approximately 50% of splenic ruptures associated with glandular fever are spontaneous, while the other 50% follow trauma. Diagnosis of glandular fever involves various investigations, including viral serology for EBV, monospot test, and liver function tests. Additional serology tests may be conducted if EBV testing is negative.

Management of glandular fever involves supportive care and symptomatic relief with simple analgesia. Antiviral medication has not been shown to be beneficial. It is important to identify patients at risk of serious complications, such as airway obstruction, splenic rupture, and dehydration, and provide appropriate management. Patients can be advised to return to normal activities as soon as possible, avoiding heavy lifting and contact sports for the first month to reduce the risk of splenic rupture.

Rare but serious complications associated with glandular fever include hepatitis, upper airway obstruction, cardiac complications, renal complications, neurological complications, haematological complications, chronic fatigue, and an increased risk of lymphoproliferative cancers and multiple sclerosis.

Most histamine receptors in the skin are of the H1 type. Therefore, when treating urticaria without airway compromise, it is appropriate to use an H1 blocking antihistamine such as chlorpheniramine, fexofenadine, or loratadine. However, if the case is mild and the trigger is easily identifiable and avoidable, NICE advises that no treatment may be necessary. In the given case, the trigger is not obvious. For more severe cases, an oral systemic steroid course like prednisolone 40 mg for 5 days may be used in addition to antihistamines. Topical steroids do not have a role in this treatment.

Further Reading:

Angioedema and urticaria are related conditions that involve swelling in different layers of tissue. Angioedema refers to swelling in the deeper layers of tissue, such as the lips and eyelids, while urticaria, also known as hives, refers to swelling in the epidermal skin layers, resulting in raised red areas of skin with itching. These conditions often coexist and may have a common underlying cause.

Angioedema can be classified into allergic and non-allergic types. Allergic angioedema is the most common type and is usually triggered by an allergic reaction, such as to certain medications like penicillins and NSAIDs. Non-allergic angioedema has multiple subtypes and can be caused by factors such as certain medications, including ACE inhibitors, or underlying conditions like hereditary angioedema (HAE) or acquired angioedema.

HAE is an autosomal dominant disease characterized by a deficiency of C1 esterase inhibitor. It typically presents in childhood and can be inherited or acquired as a result of certain disorders like lymphoma or systemic lupus erythematosus. Acquired angioedema may have similar clinical features to HAE but is caused by acquired deficiencies of C1 esterase inhibitor due to autoimmune or lymphoproliferative disorders.

The management of urticaria and allergic angioedema focuses on ensuring the airway remains open and addressing any identifiable triggers. In mild cases without airway compromise, patients may be advised that symptoms will resolve without treatment. Non-sedating antihistamines can be used for up to 6 weeks to relieve symptoms. Severe cases of urticaria may require systemic corticosteroids in addition to antihistamines. In moderate to severe attacks of allergic angioedema, intramuscular epinephrine may be considered.

The management of HAE involves treating the underlying deficiency of C1 esterase inhibitor. This can be done through the administration of C1 esterase inhibitor, bradykinin receptor antagonists, or fresh frozen plasma transfusion, which contains C1 inhibitor.

In summary, angioedema and urticaria are related conditions involving swelling in different layers of tissue. They can coexist and may have a common underlying cause. Management involves addressing triggers, using antihistamines, and in severe cases, systemic corticosteroids or other specific treatments for HAE.

Bell’s palsy is a condition characterized by a facial paralysis that affects the lower motor neurons. It can be distinguished from an upper motor neuron lesion by the inability to raise the eyebrow and the involvement of the upper facial muscles.

One distinctive feature of Bell’s palsy is the occurrence of Bell’s phenomenon, which refers to the upward and outward rolling of the eye on the affected side when attempting to close the eye and bare the teeth.

Approximately 80% of sudden onset lower motor neuron facial palsies are attributed to Bell’s palsy. It is believed that this condition is caused by swelling of the facial nerve within the petrous temporal bone, which is secondary to a latent herpesvirus, specifically HSV-1 and HZV.

Unlike some other conditions, Bell’s palsy does not lead to sensorineural deafness and tinnitus.

Treatment options for Bell’s palsy include the use of steroids and acyclovir.

A tension pneumothorax occurs when there is an air leak from the lung or chest wall that acts like a one-way valve. This causes air to build up in the pleural space without any way to escape. As a result, the pressure in the pleural space increases and pushes the mediastinum into the opposite side of the chest. If left untreated, this can lead to cardiovascular instability and even cardiac arrest.

The clinical features that are typically seen in tension pneumothorax include respiratory distress and cardiovascular instability. Tracheal deviation away from the side of injury, unilateral absence of breath sounds on the affected side, and a hyper-resonant percussion note are also characteristic. Other signs may include distended neck veins and cyanosis, although cyanosis is usually a late sign.

Both tension pneumothorax and massive haemothorax can cause decreased breath sounds on auscultation. However, they can be differentiated by percussion. Hyper-resonance suggests tension pneumothorax, while dullness indicates a massive haemothorax.

It is important to note that tension pneumothorax is a clinical diagnosis and treatment should not be delayed for radiological confirmation. Immediate decompression through needle thoracocentesis is the recommended treatment. Traditionally, a large-bore needle or cannula is inserted into the 2nd intercostal space in the midclavicular line of the affected side. However, studies have shown that using the 4th or 5th intercostal space in the midaxillary line has better success in reaching the thoracic cavity in adult patients. ATLS now recommends this location for needle decompression in adults. The location for children remains the same, and the 2nd intercostal space in the midclavicular line should still be used. It is important to remember that needle thoracocentesis is a temporary measure and definitive treatment involves the insertion of a chest drain.