-
Question 1
Correct
-
A 53-year-old man comes to the hospital complaining of left-sided arm and facial weakness that started while he was watching TV for 5 hours. He has a medical history of type 2 diabetes mellitus and hypercholesterolemia. Upon examination, there is a significant motor weakness in his left arm with no effortful muscle contractions. Sensation to pain and light touch is reduced, and he has a left-sided facial droop. A CT scan of his head shows a hypodense lesion in the area of the right anterior cerebral artery. What is the recommended definitive treatment for this patient?
Your Answer: Thrombectomy
Explanation:The recommended target time for thrombectomy in acute ischaemic stroke is within 6 hours of symptom onset.
Thrombectomy is the preferred treatment for this patient who has presented with symptoms of left-sided paralysis and paraesthesia, along with vascular risk factors and confirmatory CT imaging indicating an ischaemic stroke. While aspirin may be given initially, thrombectomy is the most definitive treatment option within the 6-hour timeframe. Clopidogrel is used for secondary prevention, and thrombolysis is only indicated within 4.5 hours of symptom onset, making them incorrect choices for this patient.
The Royal College of Physicians (RCP) and NICE have published guidelines on the diagnosis and management of patients following a stroke. The management of acute stroke includes maintaining normal levels of blood glucose, hydration, oxygen saturation, and temperature. Blood pressure should not be lowered in the acute phase unless there are complications. Aspirin should be given as soon as possible if a haemorrhagic stroke has been excluded. Anticoagulants should not be started until brain imaging has excluded haemorrhage. Thrombolysis with alteplase should only be given if administered within 4.5 hours of onset of stroke symptoms and haemorrhage has been definitively excluded. Mechanical thrombectomy is a new treatment option for patients with an acute ischaemic stroke. NICE recommends thrombectomy for people who have acute ischaemic stroke and confirmed occlusion of the proximal anterior circulation demonstrated by computed tomographic angiography or magnetic resonance angiography. Secondary prevention includes the use of clopidogrel and dipyridamole. Carotid artery endarterectomy should only be considered if carotid stenosis is greater than 70% according to ECST criteria or greater than 50% according to NASCET criteria.
-
This question is part of the following fields:
- Neurology
-
-
Question 2
Correct
-
A 54-year-old diabetic patient visits your clinic with a complaint of painless difficulty in swallowing that has been ongoing for the past two months. The patient reports that the difficulty has been getting worse, but is unsure if there has been any weight loss. On examination, there are no notable findings.
What would be your next course of action considering the possible diagnoses?Your Answer: Referral for gastroscopy
Explanation:If a patient experiences new-onset dysphagia, urgent endoscopy is necessary regardless of age or other symptoms. In the case of progressive dysphagia, it is crucial to rule out oesophageal or stomach cancer with a two week wait referral for gastroscopy. Gastroparesis, a delay in gastric emptying associated with diabetes, can be treated with metoclopramide. Plummer-vinson syndrome, which is characterized by iron deficiency anaemia and oesophageal webs, can also cause dysphagia along with glossitis and stomatitis. Gaviscon is not a suitable treatment for dysphagia as it only helps with dyspepsia. While a stroke can cause difficulties in initiating swallowing, it is typically sudden onset rather than progressive.
Understanding Dysphagia and its Causes
Dysphagia, or difficulty in swallowing, can be caused by various conditions affecting the esophagus, such as oesophageal cancer, oesophagitis, oesophageal candidiasis, achalasia, pharyngeal pouch, systemic sclerosis, and myasthenia gravis. Each condition has its own characteristic features, which can help in identifying the underlying cause of dysphagia. For instance, dysphagia associated with weight loss, anorexia, or vomiting during eating may indicate oesophageal cancer, while dysphagia of both liquids and solids from the start may suggest achalasia.
To determine the cause of dysphagia, patients usually undergo an upper GI endoscopy, which allows doctors to examine the esophagus and detect any abnormalities. Fluoroscopic swallowing studies may also be done to evaluate motility disorders. Additionally, a full blood count and ambulatory oesophageal pH and manometry studies may be required for certain conditions.
It’s important to note that new-onset dysphagia is a red flag symptom that requires urgent endoscopy, regardless of age or other symptoms. Therefore, understanding the different causes of dysphagia and their characteristic features can aid in prompt diagnosis and treatment.
-
This question is part of the following fields:
- Gastroenterology/Nutrition
-
-
Question 3
Correct
-
A 61-year-old man with a history of type 2 diabetes mellitus and benign prostatic hypertrophy experiences urinary retention and an acute kidney injury. Which medication should be discontinued?
Your Answer: Metformin
Explanation:Due to the risk of lactic acidosis, metformin should be discontinued as the patient has developed an acute kidney injury. Additionally, in the future, it may be necessary to discontinue paroxetine as SSRIs can exacerbate urinary retention.
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.
-
This question is part of the following fields:
- Pharmacology/Therapeutics
-
-
Question 4
Correct
-
A 72-year-old patient with chronic lymphocytic leukaemia presents to the emergency department with haematemesis. Urgent blood tests are taken and blood products ordered from the laboratory.
A full blood count shows:
Hb 76 g/L Male: (135-180) Female: (115 - 160)
Platelets 26 * 109/L (150 - 400)
WBC 21.8 * 109/L (4.0 - 11.0)
Which blood product carries the highest risk for this immunocompromised patient?Your Answer: Platelets
Explanation:Platelet transfusions have the highest risk of bacterial contamination due to their short shelf life and refrigeration. This patient requires both red blood cells and platelets, but caution should be taken with platelet transfusions due to the risk of contamination. Cryoprecipitate and plasma have lower contamination risks and can be stored for longer periods. Packed red cells can also be used and have a longer shelf life.
Platelet Transfusion Guidelines for Active Bleeding and Pre-Invasive Procedures
Platelet transfusions are recommended for patients with thrombocytopenia and clinically significant bleeding, such as haematemesis, melaena, or prolonged epistaxis, with a platelet count of less than 30 x 10 9. For severe bleeding or bleeding at critical sites, such as the CNS, platelet thresholds for transfusion are higher, with a maximum of less than 100 x 10 9. However, it should be noted that platelet transfusions have a higher risk of bacterial contamination compared to other types of blood products.
For pre-invasive procedures, platelet transfusions are recommended to maintain platelet levels of greater than 50 x 10 9/L for most patients, 50-75 x 10 9/L for those at high risk of bleeding, and greater than 100 x 10 9/L for surgeries at critical sites. However, if there is no active bleeding or planned invasive procedure, a threshold of 10 x 10 9/L is recommended, unless platelet transfusion is contraindicated or there are alternative treatments available for the patient’s condition.
It is important to note that platelet transfusions should not be performed for chronic bone marrow failure, autoimmune thrombocytopenia, heparin-induced thrombocytopenia, or thrombotic thrombocytopenic purpura. These guidelines aim to provide appropriate and safe platelet transfusion practices for patients with thrombocytopenia.
-
This question is part of the following fields:
- Haematology/Oncology
-
-
Question 5
Correct
-
A 48-year-old man suffers an Achilles tendon rupture while playing basketball. He has never had any medical issues related to his muscles or bones. He recently began taking antibiotics for an infection and has been on them for the past week. What type of antibiotic is he likely taking?
Your Answer: Ciprofloxacin
Explanation:New-onset Achilles tendon disorders, including tendinitis and tendon rupture, are likely caused by ciprofloxacin, a medication with important side effects to consider.
Achilles tendon disorders are a common cause of pain in the back of the heel. These disorders can include tendinopathy, partial tears, and complete ruptures of the Achilles tendon. Certain factors, such as the use of quinolone antibiotics and high cholesterol levels, can increase the risk of developing these disorders. Symptoms of Achilles tendinopathy typically include gradual onset of pain that worsens with activity, as well as morning stiffness. Treatment for this condition usually involves pain relief, reducing activities that exacerbate the pain, and performing calf muscle eccentric exercises.
In contrast, an Achilles tendon rupture is a more serious condition that requires immediate medical attention. This type of injury is often caused by sudden, forceful movements during sports or running. Symptoms of an Achilles tendon rupture include an audible popping sound, sudden and severe pain in the calf or ankle, and an inability to walk or continue the activity. To help diagnose an Achilles tendon rupture, doctors may use Simmond’s triad, which involves examining the foot for abnormal angles and feeling for a gap in the tendon. Ultrasound is typically the first imaging test used to confirm a diagnosis of Achilles tendon rupture. If a rupture is suspected, it is important to seek medical attention from an orthopaedic specialist as soon as possible.
-
This question is part of the following fields:
- Musculoskeletal
-
-
Question 6
Correct
-
A 30-year-old female patient visits the GP clinic with a tiny lump in her right breast. Upon examination, a smooth fluctuant lump is found in the right upper quadrant of the breast. The patient is referred to the breast clinic for an ultrasound scan, which reveals a 2cm cyst in the right upper quadrant of the breast. What is the most suitable course of action for management?
Your Answer: Aspiration of the cyst
Explanation:Aspirating breast cysts is necessary due to the potential risk of breast cancer, particularly in younger women. Merely monitoring the cysts with ultrasound or mammogram without aspiration is not a suitable approach. There is no need for wide local excision at this point. Providing false reassurance to the patient is not advisable.
Benign breast lesions have different features and treatments. Fibroadenomas are firm, mobile lumps that develop from a whole lobule and usually do not increase the risk of malignancy. Breast cysts are smooth, discrete lumps that may be aspirated, but blood-stained or persistently refilling cysts should be biopsied or excised. Sclerosing adenosis, radial scars, and complex sclerosing lesions cause mammographic changes that may mimic carcinoma, but do not increase the risk of malignancy. Epithelial hyperplasia may present as general lumpiness or a discrete lump, and atypical features and family history of breast cancer increase the risk of malignancy. Fat necrosis may mimic carcinoma and requires imaging and core biopsy. Duct papillomas usually present with nipple discharge and may require microdochectomy.
-
This question is part of the following fields:
- Haematology/Oncology
-
-
Question 7
Correct
-
A 25-year-old female is scheduled for middle ear prosthesis implantation to treat her sensorineural hearing loss. She has a history of appendectomy, during which she experienced intense postoperative nausea and vomiting. Which anaesthetic agent would be the most suitable for her procedure?
Your Answer: Propofol
Explanation:Overview of General Anaesthetics
General anaesthetics are drugs used to induce a state of unconsciousness in patients undergoing surgical procedures. There are two main types of general anaesthetics: inhaled and intravenous. Inhaled anaesthetics, such as isoflurane, desflurane, sevoflurane, and nitrous oxide, are administered through inhalation. These drugs work by acting on various receptors in the brain, including GABAA, glycine, NDMA, nACh, and 5-HT3 receptors. Inhaled anaesthetics can cause adverse effects such as myocardial depression, malignant hyperthermia, and hepatotoxicity.
Intravenous anaesthetics, such as propofol, thiopental, etomidate, and ketamine, are administered through injection. These drugs work by potentiating GABAA receptors or blocking NDMA receptors. Intravenous anaesthetics can cause adverse effects such as pain on injection, hypotension, laryngospasm, myoclonus, and disorientation. However, they are often preferred over inhaled anaesthetics in cases of haemodynamic instability.
It is important to note that the exact mechanism of action of general anaesthetics is not fully understood. Additionally, the choice of anaesthetic depends on various factors such as the patient’s medical history, the type of surgery, and the anaesthetist’s preference. Overall, general anaesthetics play a crucial role in modern medicine by allowing for safe and painless surgical procedures.
-
This question is part of the following fields:
- ENT
-
-
Question 8
Incorrect
-
A 40-year-old woman with amyotrophic lateral sclerosis is in a meeting with her clinical team to discuss her ongoing care. The team notes that she has been experiencing weight loss and increased fatigue. The patient reports struggling with chewing and swallowing food, even when it has been mashed or pureed. What is the most suitable long-term management plan for this patient?
Your Answer: Insert a nasogastric tube
Correct Answer: Insert a percutaneous gastrostomy tube
Explanation:The most appropriate way to provide nutritional support for patients with motor neuron disease is through the insertion of a percutaneous gastrostomy (PEG) tube. If a patient is struggling to feed themselves, they may initially benefit from smaller, more liquid-like meals, but if this is not sufficient, a PEG tube is a definitive long-term management option. Continuing with their current diet regimen is not recommended as it may lead to poor nutrition and a risk of aspiration. Total parenteral nutrition is only used as a last resort when there is impaired nutrient absorption. Inserting a nasogastric tube is not a suitable option as it must be removed after a few weeks to avoid adverse effects. A percutaneous jejunostomy tube is also not recommended as it is less commonly used and harder to maintain than a PEG tube.
Managing Motor Neuron Disease
Motor neuron disease is a neurological condition that affects both upper and lower motor neurons. It typically presents after the age of 40 and can manifest in different patterns, such as amyotrophic lateral sclerosis, progressive muscular atrophy, and bulbar palsy. The cause of the disease is unknown.
One medication used in the management of motor neuron disease is riluzole, which works by preventing the stimulation of glutamate receptors. It is mainly used in cases of amyotrophic lateral sclerosis and has been shown to prolong life by approximately three months.
Respiratory care is also an important aspect of managing motor neuron disease. Non-invasive ventilation, usually in the form of BIPAP, is used at night and has been associated with a survival benefit of around seven months.
Nutrition support is also crucial in managing motor neuron disease. The preferred method is percutaneous gastrostomy tube (PEG), which has been linked to prolonged survival.
Unfortunately, the prognosis for motor neuron disease is poor, with 50% of patients dying within three years.
-
This question is part of the following fields:
- Gastroenterology/Nutrition
-
-
Question 9
Correct
-
Which of the following medications is most likely to cause a rash when exposed to sunlight?
Your Answer: Tetracycline
Explanation:Drugs that can cause sensitivity to light
Photosensitivity is a condition where the skin becomes more sensitive to light, resulting in rashes, blisters, and other skin irritations. Certain drugs can cause photosensitivity, making it important to be aware of the medications that can cause this condition. Some of the drugs that can cause photosensitivity include thiazides, tetracyclines, sulphonamides, ciprofloxacin, amiodarone, NSAIDs like piroxicam, psoralens, and sulphonylureas.
Thiazides are a type of diuretic that can cause photosensitivity, while tetracyclines, sulphonamides, and ciprofloxacin are antibiotics that can also cause this condition. Amiodarone is a medication used to treat heart rhythm problems, but it can also cause photosensitivity. NSAIDs like piroxicam are pain relievers that can cause photosensitivity, while psoralens are used to treat skin conditions like psoriasis and can also cause photosensitivity. Sulphonylureas are medications used to treat diabetes that can cause photosensitivity as well.
It is important to note that not everyone who takes these medications will experience photosensitivity, but it is still important to be aware of the potential side effects.
-
This question is part of the following fields:
- Pharmacology/Therapeutics
-
-
Question 10
Correct
-
A 27-year-old man visits his GP and insists on getting a CT scan of his abdomen, claiming that he is certain he has cancer despite previous negative test results. What type of disorder does this behavior exemplify?
Your Answer: Hypochondrial disorder
Explanation:Somatisation refers to the manifestation of physical symptoms that cannot be explained by any underlying medical condition. On the other hand, hypochondria is a condition where a person constantly worries about having a serious illness, often believing that minor symptoms are signs of a life-threatening disease such as cancer.
Psychiatric Terms for Unexplained Symptoms
There are various psychiatric terms used to describe patients who exhibit symptoms for which no organic cause can be found. One such disorder is somatisation disorder, which involves the presence of multiple physical symptoms for at least two years, and the patient’s refusal to accept reassurance or negative test results. Another disorder is illness anxiety disorder, which is characterized by a persistent belief in the presence of an underlying serious disease, such as cancer, despite negative test results.
Conversion disorder is another condition that involves the loss of motor or sensory function, and the patient does not consciously feign the symptoms or seek material gain. Patients with this disorder may be indifferent to their apparent disorder, a phenomenon known as la belle indifference. Dissociative disorder, on the other hand, involves the process of ‘separating off’ certain memories from normal consciousness, and may manifest as amnesia, fugue, or stupor. Dissociative identity disorder (DID) is the most severe form of dissociative disorder and was previously known as multiple personality disorder.
Factitious disorder, also known as Munchausen’s syndrome, involves the intentional production of physical or psychological symptoms. Finally, malingering is the fraudulent simulation or exaggeration of symptoms with the intention of financial or other gain. Understanding these psychiatric terms can help healthcare professionals better diagnose and treat patients with unexplained symptoms.
-
This question is part of the following fields:
- Psychiatry
-
-
Question 11
Incorrect
-
A 45-year old teacher is diagnosed with a medical condition that is inherited in an autosomal dominant manner.
Which of the following diseases is best described as being inherited in an autosomal dominant manner?Your Answer: Hereditary haemochromatosis
Correct Answer: Familial hypercholesterolaemia
Explanation:Familial hypercholesterolaemia is a single gene disorder inherited in an autosomal dominant manner. Mutations in genes such as LDLR, Apo, and PCSK9 affect cholesterol handling in the body. Patients with mutations in the LDLR gene produce a defective receptor that cannot bind LDLs, leading to cholesterol accumulation outside cells and atherosclerosis. Heterozygotes are at risk of developing premature cardiovascular disease, while homozygotes can develop severe cardiovascular disease in childhood. Cystic fibrosis is the most common autosomal recessive disease caused by mutations in the CFTR gene, inhibiting the flow of chloride ions and water, leaving mucus thickened and blocking hollow organs. Hereditary haemochromatosis is caused by mutations in the HFE gene, leading to iron overload. Sickle cell anaemia is caused by a mutation in the gene coding for β globin, leading to deformed red cells that block circulation and cause tissue oxygen deficiency. Wilson’s disease is caused by a defective copper-transporting ATPase, leading to copper accumulation in the liver, brain, and other tissues, which can be fatal if not recognized.
-
This question is part of the following fields:
- Genetics
-
-
Question 12
Correct
-
A 61-year-old man with a known history of type 2 diabetes mellitus, atrial fibrillation and epilepsy presents with a complaint of feeling generally unwell. He reports a blue tinge to his vision. Which medication is most likely responsible for this symptom?
Your Answer: Sildenafil
Explanation:Drug-induced visual alterations
Viagra, also known as ‘the blue pill’, can cause blue-tinted vision. Digoxin, on the other hand, may result in yellow-green vision.Understanding Phosphodiesterase Type V Inhibitors
Phosphodiesterase type V (PDE5) inhibitors are medications used to treat erectile dysfunction and pulmonary hypertension. These drugs work by increasing the levels of cGMP, which leads to the relaxation of smooth muscles in the blood vessels supplying the corpus cavernosum. The most well-known PDE5 inhibitor is sildenafil, also known as Viagra, which was the first drug of its kind. It is a short-acting medication that is usually taken one hour before sexual activity.
Other PDE5 inhibitors include tadalafil (Cialis) and vardenafil (Levitra). Tadalafil is longer-acting than sildenafil and can be taken on a regular basis, while vardenafil has a similar duration of action to sildenafil. However, these drugs are not suitable for everyone. Patients taking nitrates or related drugs, those with hypotension, and those who have had a recent stroke or myocardial infarction should not take PDE5 inhibitors.
Like all medications, PDE5 inhibitors can cause side effects. These may include visual disturbances, blue discolouration, non-arteritic anterior ischaemic neuropathy, nasal congestion, flushing, gastrointestinal side-effects, headache, and priapism. It is important to speak to a healthcare professional before taking any medication to ensure that it is safe and appropriate for you.
Overall, PDE5 inhibitors are an effective treatment for erectile dysfunction and pulmonary hypertension. However, they should only be used under the guidance of a healthcare professional and with careful consideration of the potential risks and benefits.
-
This question is part of the following fields:
- Pharmacology/Therapeutics
-
-
Question 13
Correct
-
In a 20-year-old man with primary generalised epilepsy, what is the most suitable initial oral treatment option?
Your Answer: Valproate
Explanation:First-Line Treatments for Seizures: A Guide to Medications
When it comes to treating seizures, there are several medications available. However, not all medications are suitable for every type of seizure. Here is a breakdown of some commonly used medications and their recommended uses:
Valproate: This medication is recommended as a first-line treatment for children, young people, and adults with newly diagnosed generalized tonic-clonic seizures. However, it is important to be aware of the teratogenic and developmental risks associated with valproate.
Carbamazepine: This medication is recommended as a first-line treatment for new-onset focal seizures, but not for generalized seizures.
Topiramate: While topiramate is not routinely used as a first-line treatment for any type of seizure, it can be used as an adjunct.
Phenytoin: This medication is useful as a rescue medication in status epilepticus, but should not be considered first-line for any seizure type due to troublesome long-term side effects.
Phenobarbital: This medication is now rarely used for seizures due to its unacceptable side effects when compared to more modern alternatives.
Overall, the first-choice treatments for primary generalized epilepsy are lamotrigine and valproate. For partial (localization-related) epilepsy, carbamazepine, valproate, lamotrigine, and oxcarbazepine are all reasonable first choices.
In summary, it is important to work closely with a healthcare provider to determine the best medication for an individual’s specific type of seizure.
-
This question is part of the following fields:
- Neurology
-
-
Question 14
Correct
-
A 25-year-old woman presents with recurrent syncope following aerobics classes. On examination, a systolic murmur is heard that worsens with the Valsalva manoeuvre and improves on squatting. What is the most likely diagnosis?
Your Answer: Hypertrophic cardiomyopathy (HCM)
Explanation:Differentiating Causes of Syncope: A Guide
Syncope, or fainting, can be caused by a variety of underlying conditions. One such condition is hypertrophic cardiomyopathy (HCM), which often presents with syncope following exercise. Patients with HCM may also have a mid-systolic murmur and a jerky pulse, which worsens with Valsalva but improves with squatting.
Atrial fibrillation, on the other hand, typically presents with palpitations, fatigue, or shortness of breath, but not syncope. It does not cause a murmur and results in an irregularly irregular pulse.
Epilepsy is not a common cause of syncope, as typical seizures involve loss of consciousness, tensing, shaking, and postictal fatigue.
Aortic stenosis can cause dizziness and syncope, and is usually associated with angina. The murmur associated with aortic stenosis is a crescendo-decrescendo murmur that radiates to the carotids.
A vasovagal attack, while it can cause syncope, would not cause a murmur. If syncope is recurrent, other causes should be sought.
Dyspnea is a common complaint in patients with HCM, but they may also experience angina or syncope. A left ventricular apical impulse, a prominent S4 gallop, and a harsh systolic ejection murmur are typical findings. The Valsalva maneuver can increase the murmur. An echocardiogram is the diagnostic procedure of choice.
Most patients with aortic stenosis have gradually increasing obstruction for years but do not become symptomatic until their sixth to eighth decades.
-
This question is part of the following fields:
- Cardiovascular
-
-
Question 15
Correct
-
A 47-year-old obese man complains of fatigue and excessive thirst. What is the lowest HbA1c level that can confirm the diagnosis of type 2 diabetes mellitus?
Your Answer: 6.5% (48 mmol/mol)
Explanation:Type 2 diabetes mellitus can be diagnosed through a plasma glucose or HbA1c sample. The diagnostic criteria vary depending on whether the patient is experiencing symptoms or not. If the patient is symptomatic, a fasting glucose level of 7.0 mmol/l or higher or a random glucose level of 11.1 mmol/l or higher (or after a 75g oral glucose tolerance test) indicates diabetes. If the patient is asymptomatic, the same criteria apply but must be demonstrated on two separate occasions.
In 2011, the World Health Organization released supplementary guidance on the use of HbA1c for diagnosing diabetes. A HbA1c level of 48 mmol/mol (6.5%) or higher is diagnostic of diabetes mellitus. However, a HbA1c value of less than 48 mmol/mol (6.5%) does not exclude diabetes and may not be as sensitive as fasting samples for detecting diabetes. For patients without symptoms, the test must be repeated to confirm the diagnosis. It is important to note that increased red cell turnover can cause misleading HbA1c results.
There are certain conditions where HbA1c cannot be used for diagnosis, such as haemoglobinopathies, haemolytic anaemia, untreated iron deficiency anaemia, suspected gestational diabetes, children, HIV, chronic kidney disease, and people taking medication that may cause hyperglycaemia (such as corticosteroids).
Impaired fasting glucose (IFG) is defined as a fasting glucose level of 6.1 mmol/l or higher but less than 7.0 mmol/l. Impaired glucose tolerance (IGT) is defined as a fasting plasma glucose level less than 7.0 mmol/l and an OGTT 2-hour value of 7.8 mmol/l or higher but less than 11.1 mmol/l. People with IFG should be offered an oral glucose tolerance test to rule out a diagnosis of diabetes. A result below 11.1 mmol/l but above 7.8 mmol/l indicates that the person does not have diabetes but does have IGT.
-
This question is part of the following fields:
- Endocrinology/Metabolic Disease
-
-
Question 16
Correct
-
You are examining test results. The midstream urine specimen (MSU) of a 26-year-old woman who is 14 weeks pregnant indicates a urinary tract infection. During the discussion of the outcome with the patient, she reports experiencing dysuria and having 'foul-smelling urine.' What is the best course of action?
Your Answer: Nitrofurantoin for 7 days
Explanation:As the woman is experiencing symptoms, she requires treatment with a pregnancy-safe antibiotic. Trimethoprim is not recommended for use during the first trimester of pregnancy, making nitrofurantoin the appropriate choice. According to NICE CKS, amoxicillin should not be used due to its high resistance levels.
Urinary tract infections (UTIs) are common in adults and can affect different parts of the urinary tract. The management of UTIs depends on various factors such as the patient’s age, gender, and pregnancy status. For non-pregnant women, local antibiotic guidelines should be followed if available. Trimethoprim or nitrofurantoin for three days are recommended by NICE Clinical Knowledge Summaries. However, if the patient is aged over 65 years or has visible or non-visible haematuria, a urine culture should be sent. Pregnant women with UTIs should be treated with nitrofurantoin, amoxicillin, or cefalexin for seven days. Trimethoprim should be avoided during pregnancy as it is teratogenic in the first trimester. Asymptomatic bacteriuria in pregnant women should also be treated to prevent progression to acute pyelonephritis. Men with UTIs should be offered a seven-day course of trimethoprim or nitrofurantoin unless prostatitis is suspected. A urine culture should be sent before antibiotics are started. Catheterised patients should not be treated for asymptomatic bacteria, but if symptomatic, a seven-day course of antibiotics should be given. Acute pyelonephritis requires hospital admission and treatment with a broad-spectrum cephalosporin or quinolone for 10-14 days. Referral to urology is not routinely required for men who have had one uncomplicated lower UTI.
-
This question is part of the following fields:
- Renal Medicine/Urology
-
-
Question 17
Incorrect
-
Which of the following is not an absolute contraindication to using combined oral contraceptive pills for women?
Your Answer: Continuous use before, during and after a total knee replacement
Correct Answer: Breast feeding a 10-week-old baby
Explanation:Breastfeeding is classified as UKMEC category 4 if done for less than 6 weeks after giving birth, but it is categorized as UKMEC category 2 if done after this period.
The decision to prescribe the combined oral contraceptive pill is now based on the UK Medical Eligibility Criteria (UKMEC), which categorizes potential contraindications and cautions on a four-point scale. UKMEC 1 indicates no restrictions for use, while UKMEC 2 suggests that the benefits outweigh the risks. UKMEC 3 indicates that the disadvantages may outweigh the advantages, and UKMEC 4 represents an unacceptable health risk. Examples of UKMEC 3 conditions include controlled hypertension, a family history of thromboembolic disease in first-degree relatives under 45 years old, and current gallbladder disease. Examples of UKMEC 4 conditions include a history of thromboembolic disease or thrombogenic mutation, breast cancer, and uncontrolled hypertension. Diabetes mellitus diagnosed over 20 years ago is classified as UKMEC 3 or 4 depending on severity. In 2016, breast feeding between 6 weeks and 6 months postpartum was changed from UKMEC 3 to UKMEC 2.
-
This question is part of the following fields:
- Reproductive Medicine
-
-
Question 18
Correct
-
Sarah, a 5-year-old child visits the allergy clinic with her parents. She has a confirmed milk protein allergy and her parents are interested in using the milk ladder to manage it. Which food item would be suitable to gradually introduce?
Your Answer: Malted milk biscuits
Explanation:Children with cows milk protein allergy can use the milk ladder to reintroduce milk protein after they turn 6 months old.
To gradually introduce milk, the milk ladder starts with cooked or baked milk. The process begins with malted milk biscuits and then progresses in a step-by-step manner towards pasteurised milk.
Understanding Cow’s Milk Protein Intolerance/Allergy
Cow’s milk protein intolerance/allergy (CMPI/CMPA) is a condition that affects around 3-6% of children, typically presenting in the first 3 months of life in formula-fed infants. Both immediate and delayed reactions can occur, with CMPA used for immediate reactions and CMPI for mild-moderate delayed reactions. Symptoms include regurgitation, vomiting, diarrhea, urticaria, atopic eczema, colic symptoms, wheeze, chronic cough, and rarely, angioedema and anaphylaxis. Diagnosis is often clinical, with investigations including skin prick/patch testing and total IgE and specific IgE (RAST) for cow’s milk protein.
Management for formula-fed infants includes using extensive hydrolyzed formula (eHF) milk as the first-line replacement formula for mild-moderate symptoms and amino acid-based formula (AAF) for severe CMPA or if no response to eHF. Around 10% of infants are also intolerant to soya milk. For breastfed infants, mothers should eliminate cow’s milk protein from their diet and consider prescribing calcium supplements to prevent deficiency. eHF milk can be used when breastfeeding stops until at least 6 months and up to 12 months of age.
The prognosis for CMPI is usually good, with most children becoming milk tolerant by the age of 3-5 years. However, a challenge is often performed in a hospital setting as anaphylaxis can occur. It is important to refer infants with severe symptoms to a pediatrician for management. Understanding CMPI/CMPA and its management can help parents and healthcare providers provide appropriate care for affected children.
-
This question is part of the following fields:
- Paediatrics
-
-
Question 19
Incorrect
-
A 48-year-old man visits his doctor with worries about a discharge coming from his nipples. Which medication is the most probable cause for this symptom?
Your Answer: Isoniazid
Correct Answer: Chlorpromazine
Explanation:Gynaecomastia may be linked to each of the remaining four drugs instead of galactorrhoea.
Understanding Prolactin and Galactorrhoea
Prolactin is a hormone produced by the anterior pituitary gland, and its release is regulated by various physiological factors. Dopamine is the primary inhibitor of prolactin release, and dopamine agonists like bromocriptine can be used to manage galactorrhoea. Galactorrhoea is a condition characterized by the production of breast milk in individuals who are not breastfeeding. It is important to distinguish the causes of galactorrhoea from those of gynaecomastia, which is the enlargement of male breast tissue.
Excess prolactin can lead to different symptoms in men and women. Men may experience impotence, loss of libido, and galactorrhoea, while women may have amenorrhoea and galactorrhoea. Several factors can cause raised prolactin levels, including prolactinoma, pregnancy, oestrogens, stress, exercise, sleep, acromegaly, polycystic ovarian syndrome, and primary hypothyroidism. Additionally, certain medications like metoclopramide, domperidone, phenothiazines, haloperidol, SSRIs, and opioids can also increase prolactin levels.
In summary, understanding prolactin and its effects on the body is crucial in diagnosing and managing conditions like galactorrhoea. Identifying the underlying causes of raised prolactin levels is essential in providing appropriate treatment and improving patient outcomes.
-
This question is part of the following fields:
- Reproductive Medicine
-
-
Question 20
Correct
-
A 64-year-old woman presents to her GP complaining of worsening dyspnea. Upon taking a detailed medical history and conducting a thorough physical examination, the GP orders an outpatient chest CT scan. The results reveal lung fibrosis as the likely cause of the patient's symptoms. The patient has a medical history of gout and rheumatoid arthritis. Which medication prescribed to the patient is most likely responsible for causing lung fibrosis?
Your Answer: Sulfasalazine
Explanation:Drugs that can lead to lung fibrosis
Lung fibrosis is a condition where the lung tissue becomes scarred and thickened, making it difficult for the lungs to function properly. There are several drugs that can cause lung fibrosis as a side effect. These drugs include amiodarone, which is used to treat heart rhythm problems, cytotoxic agents such as busulphan and bleomycin, which are used to treat cancer, and anti-rheumatoid drugs like methotrexate and sulfasalazine. Nitrofurantoin, an antibiotic used to treat urinary tract infections, and ergot-derived dopamine receptor agonists like bromocriptine, cabergoline, and pergolide, which are used to treat Parkinson’s disease, can also cause lung fibrosis. It is important to be aware of the potential side effects of these drugs and to discuss any concerns with a healthcare provider. Proper monitoring and management can help prevent or minimize the risk of lung fibrosis.
-
This question is part of the following fields:
- Pharmacology/Therapeutics
-
00
Correct
00
Incorrect
00
:
00
:
00
Session Time
00
:
00
Average Question Time (
Secs)