Wernicke’s encephalopathy is a sudden neurological condition that occurs due to a lack of thiamine (vitamin B1). It is characterized by symptoms such as confusion, difficulty with coordination, low body temperature, low blood pressure, involuntary eye movements, and vomiting.

Further Reading:

Alcoholic liver disease (ALD) is a spectrum of disease that ranges from fatty liver at one end to alcoholic cirrhosis at the other. Fatty liver is generally benign and reversible with alcohol abstinence, while alcoholic cirrhosis is a more advanced and irreversible form of the disease. Alcoholic hepatitis, which involves inflammation of the liver, can lead to the development of fibrotic tissue and cirrhosis.

Several factors can increase the risk of progression of ALD, including female sex, genetics, advanced age, induction of liver enzymes by drugs, and co-existent viral hepatitis, especially hepatitis C.

The development of ALD is multifactorial and involves the metabolism of alcohol in the liver. Alcohol is metabolized to acetaldehyde and then acetate, which can result in the production of damaging reactive oxygen species. Genetic polymorphisms and co-existing hepatitis C infection can enhance the pathological effects of alcohol metabolism.

Patients with ALD may be asymptomatic or present with non-specific symptoms such as abdominal discomfort, vomiting, or anxiety. Those with alcoholic hepatitis may have fever, anorexia, and deranged liver function tests. Advanced liver disease can manifest with signs of portal hypertension and cirrhosis, such as ascites, varices, jaundice, and encephalopathy.

Screening tools such as the AUDIT questionnaire can be used to assess alcohol consumption and identify hazardous or harmful drinking patterns. Liver function tests, FBC, and imaging studies such as ultrasound or liver biopsy may be performed to evaluate liver damage.

Management of ALD involves providing advice on reducing alcohol intake, administering thiamine to prevent Wernicke’s encephalopathy, and addressing withdrawal symptoms with benzodiazepines. Complications of ALD, such as intoxication, encephalopathy, variceal bleeding, ascites, hypoglycemia, and coagulopathy, require specialized interventions.

Heavy alcohol use can also lead to thiamine deficiency and the development of Wernicke Korsakoff’s syndrome, characterized by confusion, ataxia, hypothermia, hypotension, nystagmus, and vomiting. Prompt treatment is necessary to prevent progression to Korsakoff’s psychosis.

In summary, alcoholic liver disease is a spectrum of disease that can range from benign fatty liver to irreversible cirrhosis. Risk factors for progression include female sex, genetics, advanced age, drug-induced liver enzyme induction, and co-existing liver conditions.

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.

The initial stage of SJS is characterized by a rash on the skin, specifically on the macular area. As the condition progresses, the rash transforms into blisters, known as bullae, which eventually detach from the skin.

Further Reading:

Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are severe mucocutaneous immune reactions characterized by blistering skin rash and erosions/ulceration of mucous membranes. SJS has less than 10% total body surface area (TBSA) involvement, SJS/TEN overlap has 10% to 30% TBSA involvement, and TEN has more than 30% TBSA involvement. The exact cause of SJS and TEN is not well understood, but it is believed to be a T-cell–mediated cytotoxic reaction triggered by drugs, infections, or vaccinations. Drugs are responsible for 50% of SJS cases and up to 95% of TEN cases, with antibiotics and anticonvulsants being the most common culprits.

The clinical features of SJS and TEN include a prodrome of malaise, fever, headache, and cough, followed by the appearance of small pink-red macules with darker centers. These macules can coalesce and develop into larger blisters (bullae) that eventually break and cause the epidermis to slough off. Painful mucosal erosions can also occur, affecting various parts of the body and leading to complications such as renal failure, hepatitis, pneumonia, and urethritis. Nikolsky’s sign, which refers to the easy sloughing off of the epidermal layer with pressure, is a characteristic feature of SJS and TEN.

The diagnosis of SJS, SJS/TEN overlap, and TEN can be confirmed through a skin biopsy, which typically shows desquamation at the epidermal-papillary dermal junction and the presence of necrotic epithelium and lymphocytes. Management of SJS and TEN involves supportive care, withdrawal of the causative agent if drug-related, monitoring for metabolic derangement and infection, maintaining the airway, treating respiratory function and pneumonia, fluid resuscitation, wound care, analgesia, and nutritional support. Ophthalmology consultation is also recommended. Intravenous immunoglobulin, ciclosporin, corticosteroids, and plasmapheresis may be used in treatment, but there is limited evidence supporting their effectiveness.

The prognosis of SJS and TEN can be assessed using the SCORTEN score, which comprises of 7 clinical and biological parameters, with the predicted probability of mortality ranging from 3.2% to 90.0%.

Atopic dermatitis is a long-lasting inflammatory skin condition that is linked to increased levels of IgE in the bloodstream. It is also characterized by sensitivity to various allergens found in the air, food, and microorganisms.

Further Reading:

Eczema is a chronic inflammatory skin disease characterized by dry, itchy skin with eczematous lesions. It often follows a chronic relapsing course and can lead to chronic skin changes such as lichenification and pigment changes. The term eczema is often used interchangeably with dermatitis, but strictly speaking, dermatitis refers to inflammation of the skin while eczema refers to specific conditions where skin inflammation is a feature.

Atopic eczema, also known as atopic dermatitis, is the most common type of eczema. It is usually first diagnosed in young children, with 90% of cases diagnosed before the age of 5. However, it can affect individuals of any age. Symptoms often improve as patients progress into their teens and adulthood. Around 10-20% of children are affected by atopic eczema, but only 3% of adults experience symptoms.

The exact cause of atopic eczema is not fully understood, but it is believed to be multifactorial, with both genetic and environmental factors playing a role. Genetic defects in genes that aid in the functioning of the skin barrier have been identified, which may predispose individuals to breaks in the skin barrier and increased exposure to antigens. Environmental factors such as pollution, allergen exposure, climate, and others also contribute to the development of the disease.

Diagnosing atopic eczema involves assessing the presence of key clinical features, such as pruritus (itching), eczema/dermatitis in a pattern appropriate for age, early age of onset, and personal or family history of atopy. Various diagnostic criteria have been established to aid in the diagnosis, including those set out by the American Academy of Dermatology and the UK working party.

The severity of atopic eczema can vary, and treatment options depend on the severity. Mild cases may be managed with emollients (moisturizers) and mild potency topical corticosteroids. Moderate cases may require moderate potency topical corticosteroids, topical calcineurin inhibitors, and bandages. Severe cases may necessitate the use of potent topical corticosteroids, topical calcineurin inhibitors, bandages, phototherapy, and systemic therapy.

In addition to medical treatment, identifying and avoiding triggers is an important aspect of managing atopic eczema. Common triggers include irritants, contact allergens, certain foods, skin infections, inhalant triggers, stress and infection.

Tricuspid regurgitation is commonly caused by right ventricular dilatation, often as a result of heart failure. Other factors that can contribute to this condition include right ventricular infarction and cor pulmonale. The clinical signs of right-sided heart failure are frequently observed, such as an elevated jugular venous pressure, peripheral edema, hepatomegaly, and ascites.

The murmur associated with tricuspid regurgitation is a pansystolic murmur that is most audible at the tricuspid area during inspiration. A thrill may also be felt at the left sternal edge. Reverse splitting of the second heart sound can occur due to the early closure of the pulmonary valve. Additionally, a third heart sound may be present due to rapid filling of the right ventricle.

Children with gastroenteritis who exhibit jittery movements, increased muscle tone, hyper-reflexia, or convulsions should be suspected of having hypernatraemic dehydration. This condition occurs when there is an excessive amount of sodium in the body. In this case, the patient’s history aligns with gastroenteritis, which puts them at risk for hypernatraemia. The presence of jittery movements, increased muscle tone, and hyper-reflexia further support this suspicion. To confirm the diagnosis, it is recommended to send a sample for urea and electrolyte testing to assess the patient’s sodium levels.

Further Reading:

Gastroenteritis is a common condition in children, particularly those under the age of 5. It is characterized by the sudden onset of diarrhea, with or without vomiting. The most common cause of gastroenteritis in infants and young children is rotavirus, although other viruses, bacteria, and parasites can also be responsible. Prior to the introduction of the rotavirus vaccine in 2013, rotavirus was the leading cause of gastroenteritis in children under 5 in the UK. However, the vaccine has led to a significant decrease in cases, with a drop of over 70% in subsequent years.

Norovirus is the most common cause of gastroenteritis in adults, but it also accounts for a significant number of cases in children. In England & Wales, there are approximately 8,000 cases of norovirus each year, with 15-20% of these cases occurring in children under 9.

When assessing a child with gastroenteritis, it is important to consider whether there may be another more serious underlying cause for their symptoms. Dehydration assessment is also crucial, as some children may require intravenous fluids. The NICE traffic light system can be used to identify the risk of serious illness in children under 5.

In terms of investigations, stool microbiological testing may be indicated in certain cases, such as when the patient has been abroad, if diarrhea lasts for more than 7 days, or if there is uncertainty over the diagnosis. U&Es may be necessary if intravenous fluid therapy is required or if there are symptoms and/or signs suggestive of hypernatremia. Blood cultures may be indicated if sepsis is suspected or if antibiotic therapy is planned.

Fluid management is a key aspect of treating children with gastroenteritis. In children without clinical dehydration, normal oral fluid intake should be encouraged, and oral rehydration solution (ORS) supplements may be considered. For children with dehydration, ORS solution is the preferred method of rehydration, unless intravenous fluid therapy is necessary. Intravenous fluids may be required for children with shock or those who are unable to tolerate ORS solution.

Antibiotics are generally not required for gastroenteritis in children, as most cases are viral or self-limiting. However, there are some exceptions, such as suspected or confirmed sepsis, Extraintestinal spread of bacterial infection, or specific infections like Clostridium difficile-associated pseudomembranous enterocolitis or giardiasis.

Triage is a crucial process that involves determining the priority of patients’ treatment based on the severity of their condition and their chances of recovery. Its purpose is to ensure that limited resources are used efficiently, maximizing the number of lives saved. During a major incident, primary triage takes place in the bronze area, which is located within the inner cordon.

In the context of a major incident, priorities are assigned numbers from 1 to 3, with 1 being the highest priority. These priorities are also color-coded for easy identification:
– P1: Immediate priority. This category includes patients who require immediate life-saving intervention to prevent death. They are color-coded red.
– P2: Intermediate priority. Patients in this group also require significant interventions, but their treatment can be delayed for a few hours. They are color-coded yellow.
– P3: Delayed priority. Patients in this category require medical treatment, but it can be safely delayed. This category also includes walking wounded individuals. The classification as P3 is based on the motor score of the Glasgow Coma Scale, which predicts a favorable outcome. They are color-coded green.

The fourth classification is for deceased individuals. It is important to identify and classify them to prevent the unnecessary use of limited resources on those who cannot be helped. Dead bodies should be left in their current location, both to avoid wasting resources and because the area may be considered a crime scene. Deceased individuals are color-coded black.

It is crucial to be able to distinguish between the underlying causes of congenital cyanotic and acyanotic heart disease. Tricuspid atresia is one of the causes of congenital cyanotic heart disease. Other causes in this category include Ebstein’s anomaly, Hypoplastic left heart syndrome, Tetralogy of Fallot, and Transposition of the great vessels.

On the other hand, congenital acyanotic heart disease has different causes. These include Ventricular septal defect, Patent ductus arteriosus, Atrial septal defect, Atrioventricular septal defect, Pulmonary stenosis, Aortic stenosis, and Coarctation of the aorta.

By understanding the distinctions between these causes, healthcare professionals can provide appropriate diagnosis and treatment for patients with congenital heart disease.

Malignant otitis externa, also known as necrotising otitis externa, is a severe infection that affects the external auditory canal and spreads to the temporal bone and nearby tissues, leading to skull base osteomyelitis. The primary cause of this condition is usually an infection by Pseudomonas aeruginosa. It is commonly observed in older individuals with diabetes.

Further Reading:

Otitis externa is inflammation of the skin and subdermis of the external ear canal. It can be acute, lasting less than 6 weeks, or chronic, lasting more than 3 months. Malignant otitis externa, also known as necrotising otitis externa, is a severe and potentially life-threatening infection that can spread to the bones and surrounding structures of the ear. It is most commonly caused by Pseudomonas aeruginosa.

Symptoms of malignant otitis externa include severe and persistent ear pain, headache, discharge from the ear, fever, malaise, vertigo, and profound hearing loss. It can also lead to facial nerve palsy and other cranial nerve palsies. In severe cases, the infection can spread to the central nervous system, causing meningitis, brain abscess, and sepsis.

Acute otitis externa is typically caused by Pseudomonas aeruginosa or Staphylococcus aureus, while chronic otitis externa can be caused by fungal infections such as Aspergillus or Candida albicans. Risk factors for otitis externa include eczema, psoriasis, dermatitis, acute otitis media, trauma to the ear canal, foreign bodies in the ear, water exposure, ear canal obstruction, and long-term antibiotic or steroid use.

Clinical features of otitis externa include itching of the ear canal, ear pain, tenderness of the tragus and/or pinna, ear discharge, hearing loss if the ear canal is completely blocked, redness and swelling of the ear canal, debris in the ear canal, and cellulitis of the pinna and adjacent skin. Tender regional lymphadenitis is uncommon.

Management of acute otitis externa involves general ear care measures, optimizing any underlying medical or skin conditions that are risk factors, avoiding the use of hearing aids or ear plugs if there is a suspected contact allergy, and avoiding the use of ear drops if there is a suspected allergy to any of its ingredients. Treatment options include over-the-counter acetic acid 2% ear drops or spray, aural toileting via dry swabbing, irrigation, or microsuction, and prescribing topical antibiotics with or without a topical corticosteroid. Oral antibiotics may be prescribed in severe cases or for immunocompromised individuals.

Follow-up is advised if symptoms do not improve within 48-72 hours of starting treatment, if symptoms have not fully resolved

The most commonly identified causative pathogen in patients with spontaneous bacterial peritonitis (SBP) is Escherichia coli. SBP is a serious infection that occurs in individuals with liver cirrhosis, where bacteria from the gut migrate into the peritoneal cavity, leading to infection and inflammation. E. coli is a gram-negative bacterium commonly found in the intestines and is known to be a frequent cause of SBP. It is important to promptly diagnose and treat SBP to prevent further complications and improve patient outcomes.

Further Reading:

Cirrhosis is a condition where the liver undergoes structural changes, resulting in dysfunction of its normal functions. It can be classified as either compensated or decompensated. Compensated cirrhosis refers to a stage where the liver can still function effectively with minimal symptoms, while decompensated cirrhosis is when the liver damage is severe and clinical complications are present.

Cirrhosis develops over a period of several years due to repeated insults to the liver. Risk factors for cirrhosis include alcohol misuse, hepatitis B and C infection, obesity, type 2 diabetes, autoimmune liver disease, genetic conditions, certain medications, and other rare conditions.

The prognosis of cirrhosis can be assessed using the Child-Pugh score, which predicts mortality based on parameters such as bilirubin levels, albumin levels, INR, ascites, and encephalopathy. The score ranges from A to C, with higher scores indicating a poorer prognosis.

Complications of cirrhosis include portal hypertension, ascites, hepatic encephalopathy, variceal hemorrhage, increased infection risk, hepatocellular carcinoma, and cardiovascular complications.

Diagnosis of cirrhosis is typically done through liver function tests, blood tests, viral hepatitis screening, and imaging techniques such as transient elastography or acoustic radiation force impulse imaging. Liver biopsy may also be performed in some cases.

Management of cirrhosis involves treating the underlying cause, controlling risk factors, and monitoring for complications. Complications such as ascites, spontaneous bacterial peritonitis, oesophageal varices, and hepatic encephalopathy require specific management strategies.

Overall, cirrhosis is a progressive condition that requires ongoing monitoring and management to prevent further complications and improve outcomes for patients.

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. The condition is more commonly observed in men than women, particularly in the age group of 30 to 50 years. It 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.

Suxamethonium, also called succinylcholine, is a type of drug used to block neuromuscular transmission. It acts as an agonist by binding to acetylcholine receptors at the neuromuscular junction. Unlike acetylcholine, suxamethonium is not broken down by acetylcholinesterase, which means it stays bound to the receptors for a longer time, leading to prolonged inhibition of neuromuscular transmission. Eventually, suxamethonium is metabolized by plasma cholinesterase.

Further Reading:

Rapid sequence induction (RSI) is a method used to place an endotracheal tube (ETT) in the trachea while minimizing the risk of aspiration. It involves inducing loss of consciousness while applying cricoid pressure, followed by intubation without face mask ventilation. The steps of RSI can be remembered using the 7 P’s: preparation, pre-oxygenation, pre-treatment, paralysis and induction, protection and positioning, placement with proof, and post-intubation management.

Preparation involves preparing the patient, equipment, team, and anticipating any difficulties that may arise during the procedure. Pre-oxygenation is important to ensure the patient has an adequate oxygen reserve and prolongs the time before desaturation. This is typically done by breathing 100% oxygen for 3 minutes. Pre-treatment involves administering drugs to counter expected side effects of the procedure and anesthesia agents used.

Paralysis and induction involve administering a rapid-acting induction agent followed by a neuromuscular blocking agent. Commonly used induction agents include propofol, ketamine, thiopentone, and etomidate. The neuromuscular blocking agents can be depolarizing (such as suxamethonium) or non-depolarizing (such as rocuronium). Depolarizing agents bind to acetylcholine receptors and generate an action potential, while non-depolarizing agents act as competitive antagonists.

Protection and positioning involve applying cricoid pressure to prevent regurgitation of gastric contents and positioning the patient’s neck appropriately. Tube placement is confirmed by visualizing the tube passing between the vocal cords, auscultation of the chest and stomach, end-tidal CO2 measurement, and visualizing misting of the tube. Post-intubation management includes standard care such as monitoring ECG, SpO2, NIBP, capnography, and maintaining sedation and neuromuscular blockade.

Overall, RSI is a technique used to quickly and safely secure the airway in patients who may be at risk of aspiration. It involves a series of steps to ensure proper preparation, oxygenation, drug administration, and tube placement. Monitoring and post-intubation care are also important aspects of RSI.

Moderate to severe cyanide poisoning typically leads to a condition called high anion gap metabolic acidosis, characterized by elevated levels of lactate (>10 mmol/L). Cyanide toxicity can occur from inhaling smoke produced by burning materials such as plastics, wools, silk, and other natural and synthetic polymers, which can release hydrogen cyanide (HCN). Symptoms of cyanide poisoning include headaches, nausea, decreased consciousness or loss of consciousness, and seizures. Measuring cyanide levels is not immediately helpful in managing a patient suspected of cyanide toxicity. Cyanide binds to the ferric (Fe3+) ion of cytochrome oxidase, causing a condition known as histotoxic hypoxia and resulting in lactic acidosis. The presence of a high lactate level (>10) and a classic high anion gap metabolic acidosis should raise suspicion of cyanide poisoning in a clinician.

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.

The term Apparent Life-Threatening Event (ALTE) has traditionally been used to describe a specific type of event. However, in 2016, the American Academy of Paediatrics (AAP) recommended replacing ALTE with a new term called Brief Resolved Unexplained Event (BRUE).

An ALTE is defined as an episode that is frightening to the observer and is characterized by a combination of symptoms such as apnoea (central or occasionally obstructive), color change (usually cyanotic or pallid but occasionally erythematous or plethoric), significant change in muscle tone (usually marked limpness), choking, or gagging. In some cases, the observer may even fear that the infant has died.

On the other hand, BRUE has stricter criteria and is only applicable to episodes that occur in infants under 12 months old. A BRUE is characterized by being brief (lasting less than 1 minute, typically 2-30 seconds), resolved (the infant must have returned to their baseline state), and not explained by any identifiable medical condition. It must also exhibit at least one of the following symptoms: cyanosis or pallor, absent, decreased, or irregular breathing, marked change in muscle tone (hyper- or hypotonia), or altered level of responsiveness.

To diagnose a BRUE, a thorough history and physical examination of the infant must be conducted, and no explanation for the event should be found. Additionally, there are several risk factors associated with the development of a BRUE, including prematurity, age less than ten weeks, recent anesthesia, airway or maxillofacial abnormalities, history of gastro-oesophageal reflux disease, previous apnoeic episode, recent upper respiratory tract infection. Low birth weight may also be a risk factor, while high birth weight has no recognized association with BRUEs.

Haemophilia is a collection of genetic disorders that are inherited and lead to impaired blood clotting. Haemophilia A specifically occurs when there is a deficiency of factor VIII and is typically passed down as a recessive trait on the X chromosome.

The initial signs of haemophilia A usually appear around 6 months of age when infants start crawling, although it can manifest later. Bleeding can occur either spontaneously or as a result of trauma. One key indicator of haemophilia is bleeding into muscles and joints, known as haemarthrosis. While gastrointestinal and cerebral bleeding can also happen, they are less common occurrences.

Based on the symptoms described, the most likely diagnosis from the given options would be Haemophilia A, especially when there is a combination of haemarthrosis and an older brother with the same disorder.

Idiopathic thrombocytopenic purpura (ITP) is a condition where the immune system causes a decrease in platelet count. Antibodies target the glycoprotein IIb-IIIa or Ib complex. Acute ITP is more prevalent in children and affects both sexes equally. Chronic ITP, on the other hand, is more common in young to middle-aged women. Unlike haemophilia, ITP typically presents with symptoms such as nosebleeds, oral bleeding, purpura, or petechiae, rather than haemarthrosis. Additionally, ITP is not an inherited disorder.

Glucose-6-phosphate dehydrogenase (G6PD) deficiency is an inherited disorder that follows an X-linked recessive pattern. It is characterized by a defect in the G6PD enzyme, which plays a crucial role in red blood cell metabolism. Most individuals with G6PD deficiency do not experience symptoms. However, haemolytic crisis can occur in response to factors like illness (especially infection and diabetic ketoacidosis), certain medications (such as specific antibiotics, antimalarials, sulphonamides, and aspirin), or certain foods (notably fava beans).

Von Willebrand disease (vWD) is the most common hereditary coagulation disorder, affecting approximately 1 in 100 individuals. It arises from a deficiency in Von Willebrand factor (vWF), which leads to reduced levels of factor VIII. vWF is responsible for protecting factor VIII from rapid breakdown in the blood and is also necessary for platelet adhesion.

The FeverPAIN score is a clinical scoring system that helps determine the likelihood of a streptococcal infection and whether antibiotic treatment is necessary. It consists of several criteria that are assessed to assign a score.

Firstly, if the patient has a fever higher than 38°C, they score 0 or 1 depending on the presence or absence of this symptom.

Secondly, the presence of purulence, such as pharyngeal or tonsillar exudate, results in a score of 1.

Thirdly, if the patient sought medical attention within 3 days or less, they score 1.

Fourthly, if the patient has severely inflamed tonsils, they score 1.

Lastly, if the patient does not have a cough or coryza (nasal congestion), they score 1.

By adding up the scores from each criterion, the FeverPAIN score can help healthcare professionals determine the likelihood of a streptococcal infection and guide the decision on whether antibiotic treatment is necessary. In this particular case, the patient has a score of 4.

Further Reading:

Pharyngitis and tonsillitis are common conditions that cause inflammation in the throat. Pharyngitis refers to inflammation of the oropharynx, which is located behind the soft palate, while tonsillitis refers to inflammation of the tonsils. These conditions can be caused by a variety of pathogens, including viruses and bacteria. The most common viral causes include rhinovirus, coronavirus, parainfluenza virus, influenza types A and B, adenovirus, herpes simplex virus type 1, and Epstein Barr virus. The most common bacterial cause is Streptococcus pyogenes, also known as Group A beta-hemolytic streptococcus (GABHS). Other bacterial causes include Group C and G beta-hemolytic streptococci and Fusobacterium necrophorum.

Group A beta-hemolytic streptococcus is the most concerning pathogen as it can lead to serious complications such as rheumatic fever and glomerulonephritis. These complications can occur due to an autoimmune reaction triggered by antigen/antibody complex formation or from cell damage caused by bacterial exotoxins.

When assessing a patient with a sore throat, the clinician should inquire about the duration and severity of the illness, as well as associated symptoms such as fever, malaise, headache, and joint pain. It is important to identify any red flags and determine if the patient is immunocompromised. Previous non-suppurative complications of Group A beta-hemolytic streptococcus infection should also be considered, as there is an increased risk of further complications with subsequent infections.

Red flags that may indicate a more serious condition include severe pain, neck stiffness, or difficulty swallowing. These symptoms may suggest epiglottitis or a retropharyngeal abscess, which require immediate attention.

To determine the likelihood of a streptococcal infection and the need for antibiotic treatment, two scoring systems can be used: CENTOR and FeverPAIN. The CENTOR criteria include tonsillar exudate, tender anterior cervical lymphadenopathy or lymphadenitis, history of fever, and absence of cough. The FeverPAIN criteria include fever, purulence, rapid onset of symptoms, severely inflamed tonsils, and absence of cough or coryza. Based on the scores from these criteria, the likelihood of a streptococcal infection can be estimated, and appropriate management can be undertaken. can

Ceftriaxone is currently one of the limited antibiotics that effectively treats gonorrhoea. It is typically administered alongside azithromycin or doxycycline to enhance its effectiveness.

If you have missed one pill, which means it has been 48-72 hours since you took the last pill in your current packet or you started the first pill in a new packet 24-48 hours late, you need to take the missed pill as soon as you remember. Make sure to continue taking the remaining pills at your usual time. Emergency contraception is generally not necessary in this situation, but it may be worth considering if you have missed pills earlier in the packet or during the last week of the previous packet.

Conscious sedation involves a patient who can respond purposefully to verbal commands. It is different from deeper levels of sedation where the patient may only respond to painful stimuli or not respond at all. In conscious sedation, the patient can usually maintain their own airway and does not need assistance with breathing or cardiovascular support.

Further Reading:

Procedural sedation is commonly used by emergency department (ED) doctors to minimize pain and discomfort during procedures that may be painful or distressing for patients. Effective procedural sedation requires the administration of analgesia, anxiolysis, sedation, and amnesia. This is typically achieved through the use of a combination of short-acting analgesics and sedatives.

There are different levels of sedation, ranging from minimal sedation (anxiolysis) to general anesthesia. It is important for clinicians to understand the level of sedation being used and to be able to manage any unintended deeper levels of sedation that may occur. Deeper levels of sedation are similar to general anesthesia and require the same level of care and monitoring.

Various drugs can be used for procedural sedation, including propofol, midazolam, ketamine, and fentanyl. Each of these drugs has its own mechanism of action and side effects. Propofol is commonly used for sedation, amnesia, and induction and maintenance of general anesthesia. Midazolam is a benzodiazepine that enhances the effect of GABA on the GABA A receptors. Ketamine is an NMDA receptor antagonist and is used for dissociative sedation. Fentanyl is a highly potent opioid used for analgesia and sedation.

The doses of these drugs for procedural sedation in the ED vary depending on the drug and the route of administration. It is important for clinicians to be familiar with the appropriate doses and onset and peak effect times for each drug.

Safe sedation requires certain requirements, including appropriate staffing levels, competencies of the sedating practitioner, location and facilities, and monitoring. The level of sedation being used determines the specific requirements for safe sedation.

After the procedure, patients should be monitored until they meet the criteria for safe discharge. This includes returning to their baseline level of consciousness, having vital signs within normal limits, and not experiencing compromised respiratory status. Pain and discomfort should also be addressed before discharge.

Tricuspid regurgitation is characterized by a continuous murmur that spans the entire systolic phase of the cardiac cycle. This murmur is best audible at the lower left sternal edge and has a low frequency. Interestingly, the intensity of the murmur increases during inspiration and decreases during expiration, a phenomenon referred to as Carvallo’s sign.

Further Reading:

Tricuspid regurgitation (TR) is a condition where blood flows backwards through the tricuspid valve in the heart. It is classified as either primary or secondary, with primary TR being caused by abnormalities in the tricuspid valve itself and secondary TR being the result of other conditions outside of the valve. Mild TR is common, especially in young adults, and often does not cause symptoms. However, severe TR can lead to right-sided heart failure and the development of symptoms such as ascites, peripheral edema, and hepatomegaly.

The causes of TR can vary. Primary TR can be caused by conditions such as rheumatic heart disease, myxomatous valve disease, or Ebstein anomaly. Secondary TR is often the result of right ventricular dilatation due to left heart failure or pulmonary hypertension. Other causes include endocarditis, traumatic chest injury, left ventricular systolic dysfunction, chronic lung disease, pulmonary thromboembolism, myocardial disease, left to right shunts, and carcinoid heart disease. In some cases, TR can occur as a result of infective endocarditis in IV drug abusers.

Clinical features of TR can include a pansystolic murmur that is best heard at the lower left sternal edge, Carvallo’s sign (murmur increases with inspiration and decreases with expiration), an S3 heart sound, and the presence of atrial arrhythmias such as flutter or fibrillation. Other signs can include giant C-V waves in the jugular pulse, hepatomegaly (often pulsatile), and edema with lung crepitations or pleural effusions.

The management of TR depends on the underlying cause and the severity of the condition. In severe cases, valve repair or replacement surgery may be necessary. Treatment may also involve addressing the underlying conditions contributing to TR, such as managing left heart failure or pulmonary hypertension.

Malignant otitis externa (MOE), also known as necrotising otitis externa, is a rare type of ear infection that primarily affects older individuals with diabetes, particularly if their diabetes is poorly managed.

MOE initially starts as an infection in the ear canal and gradually spreads to the surrounding bone and soft tissues. In about 98% of cases, the responsible pathogen is Pseudomonas aeruginosa.

Typically, MOE presents with intense ear pain and persistent inflammation of the ear canal that does not respond well to topical antibiotics. The pain is often described as constant and tends to worsen at night. Even after the swelling of the ear canal subsides with the use of topical antibiotics, the pain may persist. Other symptoms that may be present include pus drainage from the ear and temporal headaches. Approximately 50% of patients also experience facial nerve paralysis, and cranial nerves IX to XII may also be affected.

If left untreated, MOE can be life-threatening, and serious complications may arise, such as skull base osteomyelitis, subdural empyema, and cerebral abscess.

To diagnose MOE, technetium scanning and contrast-enhanced CT scanning are typically performed. Treatment usually involves long-term administration of intravenous antibiotics.

Vomiting is a common occurrence during the early stages of pregnancy, typically happening between 7 and 12 weeks. However, there is a more severe condition called hyperemesis gravidarum, which involves uncontrollable and intense nausea and vomiting. This condition can lead to imbalances in fluids and electrolytes, significant ketonuria, malnutrition, and weight loss. It is relatively rare, affecting less than 1% of pregnancies.

For mild cases of nausea and vomiting in early pregnancy, dietary adjustments and non-pharmacological measures like consuming ginger or using P6 wrist acupressure can often provide relief.

In severe cases where heavy ketonuria and severe dehydration are present, hospital admission is usually necessary for intravenous fluid rehydration. The NICE Clinical Knowledge Summary (CKS) on nausea and vomiting in pregnancy recommends using oral promethazine, oral cyclizine, or oral prochlorperazine as the first-line treatment if an antiemetic is needed. After 24 hours, the situation should be reassessed to determine if the initial treatment is effective. If not, a second-line drug like metoclopramide or ondansetron should be considered.

It’s important to note that metoclopramide should not be used in patients under the age of 20 due to the increased risk of extrapyramidal side effects. Additionally, proton pump inhibitors (e.g., omeprazole) and histamine H2-receptor antagonists (e.g., ranitidine) can be beneficial for women experiencing significant dyspepsia alongside their nausea and vomiting.

For more information, you can refer to the NICE CKS on nausea and vomiting in pregnancy.

Insect removal from the ear can be quite challenging due to the distress it causes the patient and the inevitable movement of the insect during the process.

To begin, it is important to make the patient comfortable by providing analgesia. In some cases, inhaled Entonox can be helpful, and if the patient is extremely distressed or experiencing significant discomfort, sedation may be necessary.

The first step in the removal process involves immobilizing or killing the insect to prevent further movement and potential damage within the ear. This can be achieved using options such as microscope immersion oil, mineral oil, or lidocaine solution.

Once the insect is confirmed to be dead, the actual removal can be performed using forceps or the highly effective Frazier suction technique. After inspecting the ear and ensuring the insect is no longer alive, connect the Frazier suction device to low continuous suction and slowly insert it into the patient’s external ear canal. By occluding the insufflation port, the contents of the ear canal can be suctioned out. Once no more liquid returns, withdraw the catheter and verify that the insect has been successfully removed.

Ipratropium bromide is a medication that falls under the category of antimuscarinic drugs. It is commonly used to manage acute asthma and chronic obstructive pulmonary disease (COPD). While it can provide short-term relief for chronic asthma, it is generally recommended to use short-acting β2 agonists as they act more quickly and are preferred.

According to the guidelines set by the British Thoracic Society (BTS), nebulized ipratropium bromide (0.5 mg every 4-6 hours) can be added to β2 agonist treatment for patients with acute severe or life-threatening asthma, or those who do not respond well to initial β2 agonist therapy.

For mild cases of chronic obstructive pulmonary disease, aerosol inhalation of ipratropium can be used for short-term relief, as long as the patient is not already using a long-acting antimuscarinic drug like tiotropium. The maximum effect of ipratropium occurs within 30-60 minutes after use, and its bronchodilating effects can last for 3-6 hours. Typically, treatment with ipratropium is recommended three times a day to maintain bronchodilation.

The most common side effect of ipratropium bromide is dry mouth. Other potential side effects include constipation, cough, paroxysmal bronchospasm, headache, nausea, and palpitations. It is important to note that ipratropium can cause urinary retention in patients with prostatic hyperplasia and bladder outflow obstruction. Additionally, it can trigger acute closed-angle glaucoma in susceptible patients.

For more information on the management of asthma, it is recommended to refer to the BTS/SIGN Guideline on the Management of Asthma.

Pyloric stenosis is characterized by recurring episodes of projectile vomiting and the presence of a mass in the upper abdomen, often described as an olive. This patient exhibits clinical features that align with pyloric stenosis and possesses several common risk factors, including being a male, being the firstborn son, being bottle-fed, and being delivered via C-section. It is important to note that intestinal atresia is typically diagnosed either during pregnancy or shortly after birth.

Further Reading:

Pyloric stenosis is a condition that primarily affects infants, characterized by the thickening of the muscles in the pylorus, leading to obstruction of the gastric outlet. It typically presents between the 3rd and 12th weeks of life, with recurrent projectile vomiting being the main symptom. The condition is more common in males, with a positive family history and being first-born being additional risk factors. Bottle-fed children and those delivered by c-section are also more likely to develop pyloric stenosis.

Clinical features of pyloric stenosis include projectile vomiting, usually occurring about 30 minutes after a feed, as well as constipation and dehydration. A palpable mass in the upper abdomen, often described as like an olive, may also be present. The persistent vomiting can lead to electrolyte disturbances, such as hypochloremia, alkalosis, and mild hypokalemia.

Ultrasound is the preferred diagnostic tool for confirming pyloric stenosis. It can reveal specific criteria, including a pyloric muscle thickness greater than 3 mm, a pylorus longitudinal length greater than 15-17 mm, a pyloric volume greater than 1.5 cm3, and a pyloric transverse diameter greater than 13 mm.

The definitive treatment for pyloric stenosis is pyloromyotomy, a surgical procedure that involves making an incision in the thickened pyloric muscle to relieve the obstruction. Before surgery, it is important to correct any hypovolemia and electrolyte disturbances with intravenous fluids. Overall, pyloric stenosis is a relatively common condition in infants, but with prompt diagnosis and appropriate management, it can be effectively treated.

Loop diuretics, like furosemide, commonly result in several electrolyte imbalances. These imbalances include hyponatremia, which is a decrease in sodium levels in the blood. Another common imbalance is hypokalemia, which refers to low levels of potassium. Additionally, loop diuretics can cause hypocalcemia, a condition characterized by low levels of calcium in the blood. Another electrolyte affected by loop diuretics is magnesium, as they can lead to hypomagnesemia, which is a deficiency of magnesium. Lastly, loop diuretics can cause hypochloremic alkalosis, which is a condition characterized by low levels of chloride in the blood and an increase in blood pH.

Wernicke’s encephalopathy is a condition that is commonly associated with alcohol abuse and other causes of thiamine deficiency. It is characterized by a classic triad of symptoms, including acute confusion, ophthalmoplegia (paralysis or weakness of the eye muscles), and ataxia (loss of coordination). Additional possible features of this condition may include papilloedema (swelling of the optic disc), hearing loss, apathy, dysphagia (difficulty swallowing), memory impairment, and hypothermia. The majority of cases also experience peripheral neuropathy, which typically affects the legs.

The condition is marked by acute capillary haemorrhages, astrocytosis (increase in the number of astrocytes, a type of brain cell), and neuronal death in the upper brainstem and diencephalon. These abnormalities can be visualized using MRI scanning, while CT scanning is not very useful for diagnosis.

If left untreated, most patients with Wernicke’s encephalopathy will go on to develop a Korsakoff psychosis. This condition is characterized by retrograde amnesia (loss of memory for events that occurred before the onset of amnesia), an inability to form new memories, disordered time perception, and confabulation (fabrication of false memories).

When Wernicke’s encephalopathy is suspected, it is crucial to administer parenteral thiamine (such as Pabrinex) for at least 5 days. Following the parenteral therapy, oral thiamine should be continued.

Compartment syndrome can occur when there are circumferential burns on the arms or legs. This typically happens with full thickness burns, where the burnt skin becomes stiff and compresses the compartment, making it difficult for blood to flow out. To treat this condition, escharotomy and possibly fasciotomy may be necessary.

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.

When a variceal bleed is suspected, it is important to start treatment with either terlipressin or somatostatin as soon as possible. These medications help control the bleeding and are typically continued for 3-5 days if variceal haemorrhage is confirmed. Additionally, an upper GI endoscopy may be performed to either band the varices or inject a sclerosing agent to stop the bleeding. If the bleeding is difficult to control, a Sengstaken-Blakemore tube may be inserted until further treatment can be administered. Once the bleeding is under control and the patient has been resuscitated, antibiotic prophylaxis should be prescribed. Ceftriaxone or fluoroquinolones are commonly used for this purpose. Proton pump inhibitors are not recommended unless there is a specific need for treating peptic ulcer disease. Beta blockers like carvedilol are used to prevent variceal bleeding but are not effective in treating active bleeding. Vitamin K is typically not used in the acute setting of variceal bleeding.

Further Reading:

Cirrhosis is a condition where the liver undergoes structural changes, resulting in dysfunction of its normal functions. It can be classified as either compensated or decompensated. Compensated cirrhosis refers to a stage where the liver can still function effectively with minimal symptoms, while decompensated cirrhosis is when the liver damage is severe and clinical complications are present.

Cirrhosis develops over a period of several years due to repeated insults to the liver. Risk factors for cirrhosis include alcohol misuse, hepatitis B and C infection, obesity, type 2 diabetes, autoimmune liver disease, genetic conditions, certain medications, and other rare conditions.

The prognosis of cirrhosis can be assessed using the Child-Pugh score, which predicts mortality based on parameters such as bilirubin levels, albumin levels, INR, ascites, and encephalopathy. The score ranges from A to C, with higher scores indicating a poorer prognosis.

Complications of cirrhosis include portal hypertension, ascites, hepatic encephalopathy, variceal hemorrhage, increased infection risk, hepatocellular carcinoma, and cardiovascular complications.

Diagnosis of cirrhosis is typically done through liver function tests, blood tests, viral hepatitis screening, and imaging techniques such as transient elastography or acoustic radiation force impulse imaging. Liver biopsy may also be performed in some cases.

Management of cirrhosis involves treating the underlying cause, controlling risk factors, and monitoring for complications. Complications such as ascites, spontaneous bacterial peritonitis, oesophageal varices, and hepatic encephalopathy require specific management strategies.

Overall, cirrhosis is a progressive condition that requires ongoing monitoring and management to prevent further complications and improve outcomes for patients.

Two scoring systems are suggested by NICE to aid in the evaluation of sore throat: The Centor Clinical Prediction Score and The FeverPAIN Score.

The FeverPAIN score was developed from a study involving 1760 adults and children aged three and above. The score was tested in a trial that compared three prescribing strategies: empirical delayed prescribing, using the score to guide prescribing, or a combination of the score with the use of a near-patient test (NPT) for streptococcus. Utilizing the score resulted in faster symptom resolution and a reduction in the prescription of antibiotics (both reduced by one third). The inclusion of the NPT did not provide any additional benefit.

The score comprises of five factors, each of which is assigned one point: Fever (Temp >38°C) in the last 24 hours, Purulence, Attended rapidly in under three days, Inflamed tonsils, and No cough or coryza.

Based on the score, the recommendations are as follows:
– Score 0-1 = 13-18% likelihood of streptococcus infection, antibiotics are not recommended.
– Score 2-3 = 34-40% likelihood of streptococcus infection, consider delayed prescribing of antibiotics (3-5 day ‘backup prescription’).
– Score 4-5 = 62-65% likelihood of streptococcus infection, use immediate antibiotics if severe, or a 48-hour short ‘backup prescription.’