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Question 1
Correct
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A 55-year-old female patient arrived at the emergency department complaining of intense pain in her left eye, along with redness and sensitivity to light. Upon examination, her intraocular pressure was found to be elevated at 30 mmHg, and her pupil was mid-dilated. After diagnosing her with acute angle closure glaucoma, you promptly administered IV acetazolamide and topical pilocarpine. What is the definitive treatment for this condition?
Your Answer: Laser peripheral iridotomy in both eyes
Explanation:The definitive treatment for acute angle-closure glaucoma is laser peripheral iridotomy, which creates an additional pathway in the iris for aqueous to flow from the posterior chamber to the anterior chamber and be drained into the angle. While topical beta blockers, alpha agonists, prostaglandin analogues, and carbonic anhydrase inhibitors can all help control intraocular pressure in glaucoma patients, they are not considered definitive treatments for AACG.
Glaucoma is a group of disorders that cause optic neuropathy due to increased intraocular pressure (IOP). However, not all patients with raised IOP have glaucoma, and vice versa. Acute angle-closure glaucoma (AACG) is a type of glaucoma where there is a rise in IOP due to impaired aqueous outflow. Factors that increase the risk of AACG include hypermetropia, pupillary dilatation, and lens growth associated with age. Symptoms of AACG include severe pain, decreased visual acuity, haloes around lights, and a hard, red-eye. Management of AACG is an emergency and requires urgent referral to an ophthalmologist. Emergency medical treatment is necessary to lower the IOP, followed by definitive surgical treatment once the acute attack has subsided.
There are no specific guidelines for the initial medical treatment of AACG, but a combination of eye drops may be used, including a direct parasympathomimetic, a beta-blocker, and an alpha-2 agonist. Intravenous acetazolamide may also be administered to reduce aqueous secretions. Definitive management of AACG involves laser peripheral iridotomy, which creates a small hole in the peripheral iris to allow aqueous humour to flow to the angle. It is important to seek medical attention immediately if symptoms of AACG are present to prevent permanent vision loss.
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This question is part of the following fields:
- Ophthalmology
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Question 2
Correct
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A 29-year-old male complains of experiencing low back pain and stiffness for a few months now, with the worst symptoms occurring in the mornings. He reports that exercise helps alleviate the pain, but prolonged sitting at his desk exacerbates it. During the examination, there is limited lumbar flexion, and a pelvic X-ray reveals sacroiliitis. What is the best initial approach to managing this condition?
Your Answer: Ibuprofen
Explanation:Ankylosing spondylitis, a spondyloarthropathy associated with HLA-B27 and commonly seen in men aged 20-30, can be managed with exercise regimes and NSAIDs as the first line of treatment. Pelvic X-rays are helpful in identifying subchondral erosions and sclerosis in the commonly affected sacroiliac joints. Physiotherapy and NSAIDs like ibuprofen are recommended as the initial management. Intra-articular corticosteroid injections are useful for unilateral joint symptoms, while methotrexate may be considered for peripheral joint involvement. Paracetamol can be used in conjunction with NSAIDs if needed, but ibuprofen should be the first-line option.
Investigating and Managing Ankylosing Spondylitis
Ankylosing spondylitis is a type of spondyloarthropathy that is associated with HLA-B27. It is more commonly seen in males aged 20-30 years old. Inflammatory markers such as ESR and CRP are usually elevated, but normal levels do not necessarily rule out ankylosing spondylitis. HLA-B27 is not a reliable diagnostic tool as it can also be positive in normal individuals. The most effective way to diagnose ankylosing spondylitis is through a plain x-ray of the sacroiliac joints. However, if the x-ray is negative but suspicion for AS remains high, an MRI can be obtained to confirm the diagnosis.
Management of ankylosing spondylitis involves regular exercise, such as swimming, and the use of NSAIDs as the first-line treatment. Physiotherapy can also be helpful. Disease-modifying drugs used for rheumatoid arthritis, such as sulphasalazine, are only useful if there is peripheral joint involvement. Anti-TNF therapy, such as etanercept and adalimumab, should be given to patients with persistently high disease activity despite conventional treatments, according to the 2010 EULAR guidelines. Ongoing research is being conducted to determine whether anti-TNF therapies should be used earlier in the course of the disease. Spirometry may show a restrictive defect due to a combination of pulmonary fibrosis, kyphosis, and ankylosis of the costovertebral joints.
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This question is part of the following fields:
- Musculoskeletal
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Question 3
Correct
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A 25-year-old homeless man presents to the emergency department with altered consciousness and abdominal pain after being intoxicated a few hours prior. He has a history of alcohol and overdose admissions.
On examination:
A - Airway is clear.
B - Respiratory rate is 34 breaths per minute with deep labored inspiration. Oxygen saturation is 100%.
C - Heart rate is 124 beats per minute, blood pressure is 95/62 mmHg, and capillary refill is 4 seconds. Mucous membranes are dry.
D - Glasgow Coma Scale score is 10.
Lab results show a pH of 7.18 (normal range: 7.35-7.45), pCO2 of 4.3kPa (normal range: 4.5-6.0kPa), bicarbonate of 14 mmol/L (normal range: 22-28 mmol/L), glucose of 22.3mmol/L, and ketones of 4.5mmol/L.
What is the most likely diagnosis?Your Answer: Diabetic ketoacidosis
Explanation:Abdominal pain can be an initial symptom of DKA, which stands for diabetic ketoacidosis. In this particular case, a young man is showing signs of DKA, such as dehydration, Kussmaul respiration, and a significantly elevated capillary glucose level. DKA patients lose around 5-8 liters of fluids, which require immediate correction. The diagnostic criteria for DKA include a pH level of less than 7.3 and/or bicarbonate level of less than 15mmol/L, blood glucose level of over 11mmol/L or known diabetes mellitus, and ketonaemia level of over 3mmol/L or significant ketonuria ++ on urine dipstick. Alcoholic ketoacidosis is not the correct diagnosis as it usually presents with low or normal glucose levels and occurs due to starvation. Hyperosmolar hyperglycaemic state is also incorrect as it typically presents with marked hyperglycemia without ketoacidosis. Opioid overdose is not the correct diagnosis either as it usually presents with respiratory depression, pinpoint pupils, and a lowered GCS, while this patient has a raised respiratory rate and abnormal respirations consistent with Kussmaul respirations.
Diabetic ketoacidosis (DKA) is a serious complication of type 1 diabetes mellitus, accounting for around 6% of cases. It can also occur in rare cases of extreme stress in patients with type 2 diabetes mellitus. However, mortality rates have decreased from 8% to under 1% in the past 20 years. DKA is caused by uncontrolled lipolysis, resulting in an excess of free fatty acids that are ultimately converted to ketone bodies. The most common precipitating factors of DKA are infection, missed insulin doses, and myocardial infarction. Symptoms include abdominal pain, polyuria, polydipsia, dehydration, Kussmaul respiration, and acetone-smelling breath. Diagnostic criteria include glucose levels above 13.8 mmol/l, pH below 7.30, serum bicarbonate below 18 mmol/l, anion gap above 10, and ketonaemia.
Management of DKA involves fluid replacement, insulin, and correction of electrolyte disturbance. Most patients with DKA are depleted around 5-8 litres, and isotonic saline is used initially, even if the patient is severely acidotic. Insulin is administered through an intravenous infusion, and correction of electrolyte disturbance is necessary. Long-acting insulin should be continued, while short-acting insulin should be stopped. DKA resolution is defined as pH above 7.3, blood ketones below 0.6 mmol/L, and bicarbonate above 15.0mmol/L. Complications may occur from DKA itself or the treatment, such as gastric stasis, thromboembolism, arrhythmias, acute respiratory distress syndrome, acute kidney injury, and cerebral oedema. Children and young adults are particularly vulnerable to cerebral oedema following fluid resuscitation in DKA and often need 1:1 nursing to monitor neuro-observations.
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This question is part of the following fields:
- Endocrinology/Metabolic Disease
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Question 4
Correct
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A 7-year-old girl comes to the emergency department with a 2-day history of right-sided otalgia and otorrhoea. Her mother suspects a middle ear infection as she has had them before. During the examination, she is found to be running a fever and has tenderness behind her right ear. The affected ear appears more prominent than the other, and otoscopy reveals a red tympanic membrane with a visible tear and pus discharge. What is the typical initial treatment for this probable diagnosis?
Your Answer: IV antibiotics
Explanation:Mastoiditis is usually diagnosed based on clinical symptoms and requires immediate administration of IV antibiotics.
Upon examination, the patient displays symptoms consistent with mastoiditis, an infection of the mastoid air cells located in the temporal bone. This condition often arises as a complication of untreated or recurrent otitis media, as is the case here. Mastoiditis is the probable diagnosis due to tenderness upon palpation of the mastoid bone, swelling of the affected ear, and accompanying symptoms of otitis media.
The correct answer is IV antibiotics. Mastoiditis is typically diagnosed based on clinical presentation and requires urgent treatment with IV antibiotics.
Oral antibiotics are not the correct answer. Although antibiotics are necessary to treat mastoiditis, this condition is considered an emergency and therefore requires IV antibiotics as the preferred treatment method.
Routine referral to an ENT specialist is not the correct answer. Mastoiditis requires immediate treatment, and therefore a routine referral is not appropriate. The patient needs prompt access to IV antibiotics.
Topical antibiotics are not the correct answer. This treatment is not suitable for mastoiditis and is typically used to treat otitis externa.
Understanding Mastoiditis
Mastoiditis is a condition that occurs when an infection spreads from the middle ear to the mastoid air spaces of the temporal bone. It is characterized by severe pain behind the ear, fever, and a history of recurrent otitis media. Patients with mastoiditis are typically very unwell and may experience swelling, erythema, and tenderness over the mastoid process. In some cases, the external ear may protrude forwards and ear discharge may be present if the eardrum has perforated.
Diagnosis of mastoiditis is typically made based on clinical presentation, although a CT scan may be ordered if complications are suspected. Treatment involves the use of IV antibiotics to combat the infection. If left untreated, mastoiditis can lead to complications such as facial nerve palsy, hearing loss, and even meningitis.
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This question is part of the following fields:
- ENT
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Question 5
Correct
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At her routine check-up, a 75 year old woman is discovered to have a serum sodium level of 128 mmol/L. Despite feeling fine and having no symptoms, which of the following medications could be responsible for her hyponatraemia?
Your Answer: Sertraline
Explanation:Hyponatraemia, a condition where there is low sodium levels in the blood, can be caused by various drugs that either increase the production or enhance the effects of antidiuretic hormone (ADH). Among these drugs, diuretics (especially thiazides), SSRIs, antipsychotics like haloperidol, nonsteroidal anti-inflammatories, and carbamazepine are the most commonly implicated. SSRIs, in particular, can trigger the release of ADH, leading to hyponatraemia within the first few weeks of treatment. However, this condition usually resolves within two weeks of discontinuing the drug. The risk of developing hyponatraemia is higher in older patients and those taking diuretics concomitantly with SSRIs.
Understanding the Side-Effects and Interactions of SSRIs
SSRIs, or selective serotonin reuptake inhibitors, are commonly prescribed antidepressants that can have various side-effects and interactions with other medications. The most common side-effect of SSRIs is gastrointestinal symptoms, and patients taking these medications are at an increased risk of gastrointestinal bleeding. To mitigate this risk, a proton pump inhibitor should be prescribed if the patient is also taking a NSAID. Hyponatraemia, or low sodium levels, can also occur with SSRIs, and patients should be vigilant for increased anxiety and agitation after starting treatment.
Fluoxetine and paroxetine have a higher propensity for drug interactions, and citalopram has been associated with dose-dependent QT interval prolongation. The Medicines and Healthcare products Regulatory Agency (MHRA) has advised that citalopram and escitalopram should not be used in patients with congenital long QT syndrome, known pre-existing QT interval prolongation, or in combination with other medicines that prolong the QT interval. The maximum daily dose of citalopram has been reduced for certain patient populations.
SSRIs can also interact with other medications, such as NSAIDs, warfarin/heparin, aspirin, and triptans. It is important to review patients after starting antidepressant therapy and to gradually reduce the dose when stopping treatment to avoid discontinuation symptoms. These symptoms can include mood changes, restlessness, difficulty sleeping, unsteadiness, sweating, gastrointestinal symptoms, and paraesthesia.
In summary, understanding the potential side-effects and interactions of SSRIs is crucial for safe and effective treatment of depression and other mental health conditions. Patients should be closely monitored and counseled on the risks and benefits of these medications.
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This question is part of the following fields:
- Psychiatry
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Question 6
Correct
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A 65-year-old woman with hypertension is taking multiple medications for her condition, including aspirin, bisoprolol, ramipril, amiodarone and furosemide. She has been experiencing increasing shortness of breath and her doctor orders pulmonary function tests, which reveal a restrictive ventilatory defect with decreased gas transfer.
Which of the following medications is most likely responsible for these abnormalities?Your Answer: Amiodarone
Explanation:Amiodarone is known to cause pulmonary fibrosis, which is evident in the patient’s symptoms of dyspnea and restrictive lung disease on spirometry. However, other potential causes of restrictive lung disease should be investigated before attributing it solely to amiodarone use. Amiodarone can also lead to liver injury and thyroid dysfunction, so monitoring liver and thyroid function is important during treatment.
Ramipril, an ACE inhibitor, commonly causes a persistent dry cough, which is the most frequently reported side effect and often leads to discontinuation of treatment. The exact mechanism of cough production is unclear, but it may involve increased levels of kinins and substance P due to ACE inhibition. Substituting with another antihypertensive drug, such as an angiotensin II receptor blocker, is typically necessary to alleviate the cough.
Aspirin can exacerbate asthma in susceptible individuals, particularly those with Samter’s triad (nasal polyps, asthma, and aspirin sensitivity). However, the patient’s restrictive lung disease is not associated with aspirin use.
Beta blockers like bisoprolol can cause bronchoconstriction in patients with asthma and COPD, making them contraindicated in asthma and requiring caution in COPD. However, the patient’s spirometry results suggest pulmonary fibrosis rather than bronchospasm.
Furosemide can rarely cause bronchoconstriction, but it is not associated with the restrictive lung disease seen in this patient.
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This question is part of the following fields:
- Respiratory Medicine
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Question 7
Incorrect
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A 28-year-old woman visits the GP clinic as she hasn't had her menstrual period for 3 months. Upon conducting a urinary pregnancy test, it comes out positive. A dating scan is scheduled, which shows a gestational sac with a nonviable foetus. What could be the possible diagnosis?
Your Answer: Inevitable miscarriage
Correct Answer: Missed miscarriage
Explanation:Miscarriage is a common complication that can occur in up to 25% of all pregnancies. There are different types of miscarriage, each with its own set of symptoms and characteristics. Threatened miscarriage is painless vaginal bleeding that occurs before 24 weeks, typically at 6-9 weeks. The bleeding is usually less than menstruation, and the cervical os is closed. Missed or delayed miscarriage is when a gestational sac containing a dead fetus is present before 20 weeks, without the symptoms of expulsion. The mother may experience light vaginal bleeding or discharge, and the symptoms of pregnancy may disappear. Pain is not usually a feature, and the cervical os is closed. Inevitable miscarriage is characterized by heavy bleeding with clots and pain, and the cervical os is open. Incomplete miscarriage occurs when not all products of conception have been expelled, and there is pain and vaginal bleeding. The cervical os is open in this type of miscarriage.
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This question is part of the following fields:
- Reproductive Medicine
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Question 8
Correct
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A 56-year-old woman collapses during a hypertension clinic. She is not breathing and a carotid pulse cannot be felt. What is the appropriate ratio of chest compressions to ventilation?
Your Answer: 30:02:00
Explanation:The 2015 Resus Council guidelines for adult advanced life support outline the steps to be taken when dealing with patients with shockable and non-shockable rhythms. For both types of patients, chest compressions are a crucial part of the process, with a ratio of 30 compressions to 2 ventilations. Defibrillation is recommended for shockable rhythms, with a single shock for VF/pulseless VT followed by 2 minutes of CPR. Adrenaline and amiodarone are the drugs of choice for non-shockable rhythms, with adrenaline given as soon as possible and amiodarone administered after 3 shocks for VF/pulseless VT. Thrombolytic drugs should be considered if a pulmonary embolus is suspected. Atropine is no longer recommended for routine use in asystole or PEA. Oxygen should be titrated to achieve saturations of 94-98% following successful resuscitation. The Hs and Ts should be considered as potential reversible causes of cardiac arrest.
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This question is part of the following fields:
- Cardiovascular
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Question 9
Correct
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A 24-year-old woman presents to the emergency department with a 3-day history of vomiting. She is unable to take any fluids orally and complains of feeling dizzy and lethargic. There is no past medical history of note and she takes no regular medications. She is 12 weeks pregnant.
On examination, she has a temperature of 36.5ÂșC with a heart rate of 110 beats/min and a blood pressure of 100/60 mmHg. She has dry mucous membranes. Her abdomen is soft and nontender.
What is the most appropriate initial anti-emetic for this patient, given the likely diagnosis?Your Answer: Cyclizine
Explanation:Antihistamines, specifically cyclizine, are the recommended first-line treatment for nausea and vomiting in pregnancy, including hyperemesis gravidarum. Dexamethasone is not typically used for hyperemesis gravidarum, as it is more commonly used for post-operative and chemotherapy-induced nausea and vomiting. Domperidone is not commonly used for hyperemesis gravidarum, as it is primarily used to treat nausea in patients with Parkinson’s disease. Metoclopramide is a second-line treatment option for hyperemesis gravidarum, but is not the first-line choice.
Hyperemesis gravidarum is an extreme form of nausea and vomiting of pregnancy that occurs in around 1% of pregnancies and is most common between 8 and 12 weeks. It is associated with raised beta hCG levels and can be caused by multiple pregnancies, trophoblastic disease, hyperthyroidism, nulliparity, and obesity. Referral criteria for nausea and vomiting in pregnancy include continued symptoms with ketonuria and/or weight loss, a confirmed or suspected comorbidity, and inability to keep down liquids or oral antiemetics. The diagnosis of hyperemesis gravidarum requires the presence of 5% pre-pregnancy weight loss, dehydration, and electrolyte imbalance. Management includes first-line use of antihistamines and oral cyclizine or promethazine, with second-line options of ondansetron and metoclopramide. Admission may be needed for IV hydration. Complications can include Wernicke’s encephalopathy, Mallory-Weiss tear, central pontine myelinolysis, acute tubular necrosis, and fetal growth issues.
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This question is part of the following fields:
- Gastroenterology/Nutrition
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Question 10
Incorrect
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Which of the following contraceptives may lead to a decrease in bone mineral density among women?
Your Answer: Progestogen only pill
Correct Answer: Depo Provera (injectable contraceptive)
Explanation:Injectable Contraceptives: Depo Provera
Injectable contraceptives are a popular form of birth control in the UK, with Depo Provera being the main option available. This contraceptive contains 150mg of medroxyprogesterone acetate and is administered via intramuscular injection every 12 weeks. It can be given up to 14 weeks after the last dose without the need for extra precautions. The primary method of action is by inhibiting ovulation, while secondary effects include cervical mucus thickening and endometrial thinning.
However, there are some disadvantages to using Depo Provera. Once the injection is given, it cannot be reversed, and there may be a delayed return to fertility of up to 12 months. Adverse effects may include irregular bleeding and weight gain, and there is a potential increased risk of osteoporosis. It should only be used in adolescents if no other method of contraception is suitable.
It is important to note that there are contraindications to using Depo Provera, such as current breast cancer (UKMEC 4) or past breast cancer (UKMEC 3). While Noristerat is another injectable contraceptive licensed in the UK, it is rarely used in clinical practice and is given every 8 weeks. Overall, injectable contraceptives can be an effective form of birth control, but it is important to weigh the potential risks and benefits before deciding on this method.
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This question is part of the following fields:
- Reproductive Medicine
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Question 11
Correct
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An 18-year-old woman presents to her GP with painful lumps in her neck that appeared two days ago. She also reports a sore throat and fever. Upon examination, she has tender, enlarged, smooth masses on both sides. What is the most probable diagnosis?
Your Answer: Reactive lymphadenopathy
Explanation:Differentiating Neck Lumps: Causes and Characteristics
When a patient presents with a neck lump, it is important to consider the possible causes and characteristics to determine the appropriate course of action. In this case, the patient’s sore throat and fever suggest a throat infection, which has resulted in reactive lymphadenopathy. This is a common cause of neck lump presentations in primary care.
Other possible causes of neck lumps include goitre, which is a painless mass in the midline of the throat that is not associated with fever and may be functional if accompanied by hyperthyroidism. An abscess could also present as a painful neck lump, but the history of a sore throat and bilateral swelling make this less likely.
Branchial cysts are smooth, soft masses in the lateral neck that are usually benign and congenital in origin. Lipomas, on the other hand, are lumps caused by the accumulation of soft, fatty deposits under the skin and do not typically present with systemic features.
In summary, understanding the characteristics and possible causes of neck lumps can aid in the diagnosis and management of patients presenting with this symptom.
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This question is part of the following fields:
- ENT
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Question 12
Incorrect
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Which one of the following statements regarding metformin is not true?
Your Answer: Decreases hepatic gluconeogenesis
Correct Answer: Increases endogenous insulin secretion
Explanation:Sulphonylureas possess the characteristic of enhancing the secretion of insulin produced naturally within the body.
Metformin is a medication commonly used to treat type 2 diabetes mellitus. It belongs to a class of drugs called biguanides and works by activating the AMP-activated protein kinase (AMPK), which increases insulin sensitivity and reduces hepatic gluconeogenesis. Additionally, it may decrease the absorption of carbohydrates in the gastrointestinal tract. Unlike other diabetes medications, such as sulphonylureas, metformin does not cause hypoglycemia or weight gain, making it a first-line treatment option, especially for overweight patients. It is also used to treat polycystic ovarian syndrome and non-alcoholic fatty liver disease.
While metformin is generally well-tolerated, gastrointestinal side effects such as nausea, anorexia, and diarrhea are common and can be intolerable for some patients. Reduced absorption of vitamin B12 is also a potential side effect, although it rarely causes clinical problems. In rare cases, metformin can cause lactic acidosis, particularly in patients with severe liver disease or renal failure. However, it is important to note that lactic acidosis is now recognized as a rare side effect of metformin.
There are several contraindications to using metformin, including chronic kidney disease, recent myocardial infarction, sepsis, acute kidney injury, severe dehydration, and alcohol abuse. Additionally, metformin should be discontinued before and after procedures involving iodine-containing x-ray contrast media to reduce the risk of contrast nephropathy.
When starting metformin, it is important to titrate the dose slowly to reduce the incidence of gastrointestinal side effects. If patients experience intolerable side effects, modified-release metformin may be considered as an alternative.
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This question is part of the following fields:
- Pharmacology/Therapeutics
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Question 13
Incorrect
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A 7-year-old boy who has recently arrived from India complains of fever. During examination, extensive cervical lymphadenopathy is observed and a grey coating is seen surrounding the tonsils. What is the probable diagnosis?
Your Answer: Typhoid
Correct Answer: Diphtheria
Explanation:Understanding Diphtheria: Causes, Symptoms, and Treatment
Diphtheria is a bacterial infection caused by the Gram positive bacterium Corynebacterium diphtheriae. The pathophysiology of this disease involves the release of an exotoxin encoded by a ÎČ-prophage, which inhibits protein synthesis by catalyzing ADP-ribosylation of elongation factor EF-2. This toxin commonly causes a ‘diphtheric membrane’ on tonsils, resulting in a grey, pseudomembrane on the posterior pharyngeal wall. Systemic distribution may produce necrosis of myocardial, neural, and renal tissue.
Possible presentations of diphtheria include sore throat with a ‘diphtheric membrane’, bulky cervical lymphadenopathy, and neuritis of cranial nerves. It may also result in a ‘bull neck’ appearance and heart block. People who have recently visited Eastern Europe, Russia, or Asia are at a higher risk of contracting this disease.
To diagnose diphtheria, a culture of throat swab is taken using tellurite agar or Loeffler’s media. The treatment for diphtheria involves intramuscular penicillin and diphtheria antitoxin.
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This question is part of the following fields:
- Infectious Diseases
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Question 14
Correct
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A 30-year-old woman is brought to the emergency department with difficulty breathing. Her pulmonary function tests show a peak expiratory flow rate that is 60% below the normal range for her age and height.
What is the most likely diagnosis?Your Answer: Asthma
Explanation:Understanding PEFR and Its Role in Diagnosing Asthma
Peak expiratory flow rate (PEFR) is a valuable tool in both the diagnosis and management of asthma. It is measured by a maximal forced expiration through a peak-flow meter and correlates well with forced expiratory volume in one second (FEV1), providing an estimate of airway calibre. Patients with asthma can monitor their PEFR at home to track disease control. A PEFR <80% of predicted is a strong indicator of obstructive airway disease, such as asthma. However, it’s important to note that PEFR is not affected by restrictive defects, such as those caused by kyphoscoliosis. Bronchial carcinoma itself does not cause airflow limitation, but a co-morbid obstructive lung disease, such as asthma or COPD, could produce abnormal PEFR readings. Bronchiectasis can cause an obstructive pattern on spirometry, but it would not typically cause a reduction in PEFR. Whooping cough, despite causing inflammation of the airways, would not typically result in the markedly reduced PEFR readings seen in asthma. In conclusion, understanding PEFR and its role in diagnosing asthma is crucial for both patients and healthcare providers. By monitoring PEFR at home and seeking medical attention when necessary, individuals with asthma can better manage their condition and improve their quality of life.
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This question is part of the following fields:
- Respiratory Medicine
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Question 15
Correct
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An 80-year-old woman arrives at the emergency department complaining of a severe headache on the right side of her head. Upon further inquiry, the doctors discover that she experiences pain while chewing. During the examination, there are no neurological impairments, and her visual fields appear normal. However, she does exhibit tenderness on her right scalp. What is the probable diagnosis?
Your Answer: Temporal arteritis
Explanation:Temporal arteritis is likely the cause of a constant throbbing headache, pain while chewing, and tenderness in the scalp. These symptoms are not typical of a migraine, which usually involves pain on one side of the head, sensitivity to light, nausea/vomiting, and sometimes an aura. A subarachnoid hemorrhage typically presents with a sudden, severe headache in the occipital region. Tension headaches are often described as a dull, band-like pain across the forehead. Cluster headaches are characterized by intense pain around the eye, accompanied by tearing, redness, and a stuffy nose.
Understanding Temporal Arteritis
Temporal arteritis is a type of large vessel vasculitis that often overlaps with polymyalgia rheumatica (PMR). It is characterized by changes in the affected artery that skip certain sections while damaging others. This condition typically affects individuals who are over 60 years old and has a rapid onset, usually occurring in less than a month. The most common symptoms include headache and jaw claudication, while vision testing is a crucial investigation for all patients.
Temporal arteritis can lead to various ocular complications, with anterior ischemic optic neuropathy being the most common. This results from the occlusion of the posterior ciliary artery, leading to ischemia of the optic nerve head. Patients may experience temporary visual loss or even permanent visual loss, which is the most feared complication of this condition. Other symptoms may include diplopia, tender and palpable temporal artery, and features of PMR such as aching, morning stiffness in proximal limb muscles, lethargy, depression, low-grade fever, anorexia, and night sweats.
To diagnose temporal arteritis, doctors may look for raised inflammatory markers such as an ESR of over 50 mm/hr or elevated CRP levels. A temporal artery biopsy may also be performed to check for skip lesions. Urgent high-dose glucocorticoids should be given as soon as the diagnosis is suspected, and an ophthalmologist should review patients with visual symptoms on the same day. Treatment may also involve bone protection with bisphosphonates and low-dose aspirin, although the evidence supporting the latter is weak.
In summary, temporal arteritis is a serious condition that requires prompt diagnosis and treatment to prevent irreversible visual damage. Patients who experience symptoms such as headache, jaw claudication, and visual disturbances should seek medical attention immediately.
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This question is part of the following fields:
- Musculoskeletal
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Question 16
Correct
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As a foundation doctor in general practice, you have a patient who is a sexually active sixteen-year-old seeking advice about her contraceptive patch. She typically changes the patch on Saturday mornings but forgot to do so this week. What guidance should you provide?
Your Answer: Change the patch now, use barrier contraceptives for seven days and consider emergency contraception
Explanation:To ensure the effectiveness of the contraceptive patch, it should be applied to clean, dry skin on a weekly basis for three weeks, followed by a patch-free week to stimulate a withdrawal bleed. However, if the patch change is delayed for more than 48 hours, it is important to change it immediately and use a barrier method of contraception for the next 7 days. In case of unprotected intercourse, emergency contraceptives should be considered.
The Evra patch is the only contraceptive patch that is approved for use in the UK. The patch cycle lasts for four weeks, during which the patch is worn every day for the first three weeks and changed weekly. During the fourth week, the patch is not worn, and a withdrawal bleed occurs.
If a woman delays changing the patch at the end of week one or two, she should change it immediately. If the delay is less than 48 hours, no further precautions are necessary. However, if the delay is more than 48 hours, she should change the patch immediately and use a barrier method of contraception for the next seven days. If she has had unprotected sex during this extended patch-free interval or in the last five days, emergency contraception should be considered.
If the patch removal is delayed at the end of week three, the woman should remove the patch as soon as possible and apply a new patch on the usual cycle start day for the next cycle, even if withdrawal bleeding is occurring. No additional contraception is needed.
If patch application is delayed at the end of a patch-free week, additional barrier contraception should be used for seven days following any delay at the start of a new patch cycle. For more information, please refer to the NICE Clinical Knowledge Summary on combined hormonal methods of contraception.
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This question is part of the following fields:
- Reproductive Medicine
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Question 17
Incorrect
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Which of the following complications is most commonly associated with PUVA therapy in elderly patients?
Your Answer: Basal cell cancer
Correct Answer: Squamous cell cancer
Explanation:Squamous cell skin cancer is the most notable adverse effect of PUVA therapy in treating psoriasis.
NICE recommends a step-wise approach for chronic plaque psoriasis, starting with regular emollients and then using a potent corticosteroid and vitamin D analogue separately, followed by a vitamin D analogue twice daily, and then a potent corticosteroid or coal tar preparation if there is no improvement. Phototherapy, systemic therapy, and topical treatments are also options for management. Topical steroids should be used cautiously and vitamin D analogues may be used long-term. Dithranol and coal tar have adverse effects but can be effective.
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This question is part of the following fields:
- Dermatology
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Question 18
Correct
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A 5-year-old girl is presented to your GP clinic by her father with a complaint of erythematous sores on her face for the past 2 days. The lesions are limited to her face and have started to weep and progress to honey crusted lesions over the last 24 hours. The child is otherwise healthy. Previously, topical hydrogen peroxide was ineffective for a similar episode. What is the most appropriate treatment option?
Your Answer: Topical fusidic acid
Explanation:If hydrogen peroxide is not appropriate, topical fusidic acid can be used for impetigo.
Understanding Impetigo: Causes, Symptoms, and Management
Impetigo is a common bacterial skin infection that affects both children and adults. It is caused by either Staphylococcus aureus or Streptococcus pyogenes and can develop anywhere on the body, but lesions tend to occur on the face, flexures, and limbs not covered by clothing. The infection can be a primary infection or a complication of an existing skin condition such as eczema, scabies, or insect bites. Impetigo is highly contagious and can spread through direct contact with discharges from the scabs of an infected person or indirectly through toys, clothing, equipment, and the environment.
The symptoms of impetigo include ‘golden’, crusted skin lesions typically found around the mouth. The infection can be managed with limited, localized disease by using hydrogen peroxide 1% cream or topical antibiotic creams such as fusidic acid or mupirocin. However, if the disease is extensive, oral flucloxacillin or oral erythromycin may be prescribed. It is important to note that MRSA is not susceptible to either fusidic acid or retapamulin, so topical mupirocin should be used in this situation.
Children with impetigo should be excluded from school until the lesions are crusted and healed or 48 hours after commencing antibiotic treatment. It is also important to practice good hygiene, such as washing hands regularly and avoiding close contact with infected individuals, to prevent the spread of impetigo. By understanding the causes, symptoms, and management of impetigo, individuals can take steps to prevent and treat this common bacterial skin infection.
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This question is part of the following fields:
- Dermatology
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Question 19
Correct
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A 35-year-old man is being monitored by his general practitioner for primary prevention of cardiovascular disease. He is a smoker and has a strong family history of premature death from ischaemic heart disease. Following lifestyle modifications, his fasting cholesterol concentration is 7.2 mmol/l. Upon consulting the local guidelines, it is found that his Qrisk2 score is > 17%. What drug therapy would you recommend?
Your Answer: Statin
Explanation:New NICE Guidelines for Lipid Modification: Statins as First-Line Treatment for Cardiovascular Risk
The National Institute for Health and Care Excellence (NICE) has updated its guidelines for lipid modification, recommending statins as the first-line treatment for patients with a cardiovascular risk of over 10%. Atorvastatin 20 mg is the preferred statin for these patients.
Cholestyramine, a previously used medication for hypercholesterolaemia, is no longer recommended. Instead, dietary advice should be offered alongside statin therapy. Fibrates and nicotinic acid may be used as second-line options for patients with high triglyceride levels or those who cannot tolerate multiple statins.
Under the new guidelines, patients with a QRISK2 score of over 10% should be offered statin therapy to reduce their 10-year risk for cardiovascular disease. After three months, lipids should be rechecked, with a focus on non-HDL cholesterol and aiming for a 40% reduction in non-HDL cholesterol.
In addition to medication, patients should be offered interventions to address modifiable risk factors such as smoking cessation, alcohol moderation, and weight reduction where appropriate. These new guidelines aim to improve the management of lipid disorders and reduce the risk of cardiovascular disease.
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This question is part of the following fields:
- Cardiovascular
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Question 20
Correct
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A 6-year-old girl from a travelling community is brought to the Emergency Department with respiratory distress. Upon examination, she has a fever of 38.5ÂșC, stridor, and appears toxic. The medical team suspects acute epiglottitis. Which of the following pathogens is the most probable cause?
Your Answer: Haemophilus influenzae
Explanation:Incomplete immunisation may be a concern for patients belonging to travelling communities with regards to acute epiglottitis caused by Haemophilus influenzae type B.
Acute epiglottitis is a rare but serious infection caused by Haemophilus influenzae type B. It is important to recognize and treat it promptly as it can lead to airway obstruction. Although it was once considered a disease of childhood, it is now more common in adults in the UK due to the immunization program. The incidence of epiglottitis has decreased since the introduction of the Hib vaccine. Symptoms include a rapid onset, high temperature, stridor, drooling of saliva, and a tripod position where the patient leans forward and extends their neck to breathe easier. Diagnosis is made by direct visualization, but x-rays may be done to rule out a foreign body.
Immediate senior involvement is necessary, including those who can provide emergency airway support such as anaesthetics or ENT. Endotracheal intubation may be necessary to protect the airway. It is important not to examine the throat if epiglottitis is suspected due to the risk of acute airway obstruction. The diagnosis is made by direct visualization, but only senior staff who are able to intubate if necessary should perform this. Treatment includes oxygen and intravenous antibiotics.
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This question is part of the following fields:
- Paediatrics
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