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Question 1
Correct
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A 54-year-old woman presents with back and flank pain affecting both sides. She has been diagnosed some years ago with antiphospholipid antibody syndrome and has suffered from a previous deep vein thrombosis. On assessment, temperature is 36.7oC, heart rate is 76 bpm, blood pressure 128/80 mmHg and she is still passing urine.
Investigations:
Investigation Result Normal value
Sodium (Na+) 141 mmol/l 135–145 mmol/l
Potassium (K+) 6.3 mmol/l 3.5–5.0 mmol/l
Urea 17.3 mmol/l 2.5–6.5 mmol/l
Creatinine 325 μmol/l 50–120 µmol/l
Urine proteinuria +++
Which of the following diagnoses fits best with this clinical scenario?Your Answer: Bilateral renal vein thrombosis
Explanation:Possible Causes of Bilateral Flank Pain, Renal Failure, and Proteinuria
Bilateral flank pain, renal failure, and marked proteinuria can be caused by various conditions. One possible diagnosis is bilateral renal vein thrombosis, especially if the patient has a history of antiphospholipid antibody syndrome and previous deep vein thrombosis. Other causes of renal vein thrombosis include extrinsic compression of the renal vein by a tumour or a retroperitoneal mass, invasion of the renal vein or inferior vena cava by a tumour, or nephrotic syndrome that increases coagulability. Abdominal ultrasound and angiography can help diagnose renal vein thrombosis, and anticoagulation is the main treatment.
Bilateral ureteric obstruction can cause anuria, while bilateral pyelonephritis can cause sepsis and leukocytes and nitrites in the urine. Medullary sponge kidney, a congenital disorder that causes cystic dilation of the collecting ducts in one or both kidneys, may present with haematuria or nephrocalcinosis but does not affect renal function. Bilateral renal artery stenosis can cause uncontrollable hypertension and reduced renal function but not pain. Therefore, a thorough evaluation is necessary to determine the underlying cause of the patient’s symptoms.
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This question is part of the following fields:
- Renal
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Question 2
Incorrect
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A 26-year-old man on the Medical Ward develops status epilepticus. He is immediately attended by the Foundation Year One Doctor who notices that his airway has been compromised. The patient is immediately examined and found to be haemodynamically stable, with a history of hypertension and asthma. The anaesthetist immediately performs a rapid sequence induction and intubation (RSII) to clear the patient’s airway.
Which of the following inducing agents used in RSII is most likely to be used in this patient?Your Answer: Midazolam
Correct Answer: Propofol
Explanation:Common Inducing Anaesthetic Agents and Their Uses
Propofol, etomidate, ketamine, midazolam, and thiopental are all commonly used inducing anaesthetic agents with varying properties and uses.
Propofol is the drug of choice for RSII procedures in normotensive individuals without obvious cardiovascular pathology. It has amnesic, anxiolytic, anticonvulsant, and muscle relaxant properties, but no analgesic effects.
Etomidate provides haemodynamic stability without histamine activity and minimal analgesic effects. It is used in RSI procedures in patients with raised intracranial pressure and cardiovascular conditions, often in combination with fentanyl.
Ketamine is a non-competitive glutamate N-methyl-D-aspartate (NMDA) receptor blocker that produces dissociative anaesthesia. It can be used for induction of anaesthesia in patients with hypotension, status asthmaticus, and shock, but is avoided in hypertensive patients due to relative contraindications.
Midazolam is a benzodiazepine with anticonvulsive, muscle relaxant, and anaesthetic actions. At higher doses or in combination with other opioids, it induces significant cardiovascular and respiratory depression.
Thiopental is administered intravenously as an inducing anaesthetic agent or as a short-acting anaesthetic. It is also used as an anticonvulsant agent and to decrease intracranial pressure in neurosurgical procedures.
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This question is part of the following fields:
- Anaesthetics & ITU
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Question 3
Correct
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What is the underlying cause of primary hyperthyroidism associated with Graves' disease?
Your Answer: Anti-TSH receptor antibodies
Explanation:Graves’ Disease
Graves’ disease is a medical condition that is characterized by the presence of anti-TSH receptor antibodies that stimulate the thyroid gland. This results in hyperthyroidism and a diffusely enlarged thyroid gland, also known as a goitre. Patients with Graves’ disease may also experience other symptoms such as exophthalmos, which is the protrusion of the eyes, lid retraction, lid lag, and ophthalmoplegia.
It is important to note that Graves’ disease is often associated with other autoimmune diseases such as vitiligo, Addison’s disease, and type 1 diabetes. This means that patients with Graves’ disease may be at a higher risk of developing these conditions as well.
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This question is part of the following fields:
- Endocrinology
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Question 4
Incorrect
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A 35-year-old primigravida, who is 12 weeks pregnant, comes to your Antenatal clinic for counselling about Down syndrome screening, as her sister has the genetic condition. After discussing the various tests with her, she decides to opt for the earliest possible diagnostic test that will tell her whether her baby has Down syndrome.
What is the test that you are most likely to advise her to have?Your Answer: Nuchal translucency test
Correct Answer: Chorionic villus sampling (CVS)
Explanation:Prenatal Testing Options for Expecting Mothers
Expecting mothers have several options for prenatal testing to ensure the health of their developing baby. Chorionic villus sampling (CVS) is a diagnostic procedure that can be done from 11 weeks to detect chromosomal abnormalities. The risk of miscarriage is low, at 0.7% within 14 days and 1.3% within 30 days. Amniocentesis is another diagnostic option that can be done from 15 weeks, with a slightly lower risk of miscarriage at 0.6%.
Anomaly scans are typically done at 18-21 weeks to check for any physical abnormalities in the baby, such as spina bifida or anencephaly. The nuchal translucency test, combined with blood tests, is a screening test that can determine the individual’s risk for certain chromosomal abnormalities. The quadruple blood test is another screening option that measures various hormones and proteins to assess the risk of certain conditions.
Overall, expecting mothers have several options for prenatal testing to ensure the health of their baby. It is important to discuss these options with a healthcare provider to determine the best course of action for each individual pregnancy.
Understanding Prenatal Testing Options for Expecting Mothers
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This question is part of the following fields:
- Obstetrics
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Question 5
Incorrect
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Sarah is a 19-year-old woman who visits her GP complaining of myalgia and fatigue. She has no significant medical history. In the past, she had a rash on her cheeks that did not improve with anti-fungal cream.
During the examination, her vital signs are normal, and there is no joint swelling or redness. However, she experiences tenderness when her hands are squeezed. Sarah's muscle strength is 5/5 in all groups.
Sarah's maternal aunt has been diagnosed with systemic lupus erythematosus (SLE), and she is worried that she might have it too.
Which of the following blood tests, if negative, can be a useful test to rule out SLE?Your Answer: ENA
Correct Answer: ANA
Explanation:A useful test to rule out SLE is ANA positivity, as the majority of patients with SLE are ANA positive. While CRP and ESR may rise during an acute flare of SLE, they are not specific to autoimmune conditions. ANCA is an antibody found in patients with autoimmune vasculitis.
Systemic lupus erythematosus (SLE) can be investigated through various tests, including antibody tests. ANA testing is highly sensitive, making it useful for ruling out SLE, but it has low specificity. About 99% of SLE patients are ANA positive. Rheumatoid factor testing is positive in 20% of SLE patients. Anti-dsDNA testing is highly specific (>99%), but less sensitive (70%). Anti-Smith testing is also highly specific (>99%), but only 30% of SLE patients test positive. Other antibody tests include anti-U1 RNP, SS-A (anti-Ro), and SS-B (anti-La).
Monitoring of SLE can be done through various markers, including inflammatory markers such as ESR. During active disease, CRP levels may be normal, but a raised CRP may indicate an underlying infection. Complement levels (C3, C4) are low during active disease due to the formation of complexes that lead to the consumption of complement. Anti-dsDNA titres can also be used for disease monitoring, but it is important to note that they are not present in all SLE patients. Proper monitoring of SLE is crucial for effective management of the disease.
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This question is part of the following fields:
- Musculoskeletal
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Question 6
Correct
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A 75-year-old man of Brazilian descent is referred for an outpatient DEXA scan by his general practitioner. He has obesity and chronic kidney disease (for which he takes ramipril). He has never smoked and rarely drinks alcohol. What risk factor predisposes him to this condition? His DEXA scan now shows a T-score of -3 and he is started on alendronic acid.
Your Answer: Chronic kidney disease
Explanation:Chronic kidney disease (CKD) increases the risk of developing osteoporosis, a condition characterized by a T score < -2.5 on DEXA scan. CKD affects the metabolic pathways involved in vitamin D synthesis and serum phosphate levels, leading to increased parathyroid hormone (PTH) secretion and osteoclast activation, which contribute to the development of osteoporosis. Ethnicity, including being Brazilian, does not affect the risk of developing osteoporosis. However, being Asian or Caucasian is associated with a higher risk, although the reasons for this are not fully understood. Smoking is a significant risk factor for osteoporosis, and non-smokers are relatively protected against it. Smoking affects bone metabolism by limiting oxygen supply to the bones, slowing down osteoblast production, and reducing calcium absorption. Contrary to popular belief, obesity is not a risk factor for osteoporosis. In fact, a low body mass index is associated with a higher risk. This is because extra weight stresses the bone, which stimulates the formation of new bone tissue. Additionally, adipose tissue is a source of estrogen synthesis, which helps prevent bone density loss. Understanding the Causes of Osteoporosis Osteoporosis is a condition that affects the bones, making them weak and brittle. It is more common in women and older adults, with the prevalence increasing significantly in women over the age of 80. However, there are many other risk factors and secondary causes of osteoporosis that should be considered. Some of the most important risk factors include a history of glucocorticoid use, rheumatoid arthritis, alcohol excess, parental hip fracture, low body mass index, and smoking. Other risk factors include a sedentary lifestyle, premature menopause, certain ethnicities, and endocrine disorders such as hyperthyroidism and diabetes mellitus. There are also medications that may worsen osteoporosis, such as SSRIs, antiepileptics, and proton pump inhibitors. If a patient is diagnosed with osteoporosis or has a fragility fracture, further investigations may be necessary to identify the cause and assess the risk of subsequent fractures. Recommended investigations include blood tests, bone densitometry, and other procedures as indicated. It is important to identify the cause of osteoporosis and contributory factors in order to select the most appropriate form of treatment. As a minimum, all patients should have a full blood count, urea and electrolytes, liver function tests, bone profile, CRP, and thyroid function tests.
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This question is part of the following fields:
- Musculoskeletal
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Question 7
Correct
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A 65-year-old man presents for his regular diabetic eye screening. He had visited his GP recently and had his blood sugar levels under control. During the examination, cotton wool spots and neovascularisation are observed throughout the retina, leading to a diagnosis of proliferative retinopathy. What is the most effective treatment for this condition?
Your Answer: Panretinal laser photocoagulation
Explanation:Panretinal laser photocoagulation is the preferred treatment for proliferative retinopathy, a condition characterized by the growth of fragile new blood vessels that can cause vitreal hemorrhage. In addition to controlling blood sugar levels and using anti-VEGF injections, thermal burns are made using a laser to prevent abnormal blood vessel development. Conservative management and monitoring are not sufficient for definitive management, as neovascularization can lead to serious complications. Laser iridotomy and phacoemulsification are not indicated for this condition.
Understanding Diabetic Retinopathy
Diabetic retinopathy is a leading cause of blindness among adults aged 35-65 years old. The condition is caused by hyperglycemia, which leads to abnormal metabolism in the retinal vessel walls and damage to endothelial cells and pericytes. This damage causes increased vascular permeability, resulting in exudates seen on fundoscopy. Pericyte dysfunction predisposes to the formation of microaneurysms, while neovascularization is caused by the production of growth factors in response to retinal ischemia.
Patients with diabetic retinopathy are classified into those with nonproliferative diabetic retinopathy (NPDR), proliferative retinopathy (PDR), and maculopathy. NPDR is further classified into mild, moderate, and severe, depending on the presence of microaneurysms, blot hemorrhages, hard exudates, cotton wool spots, venous beading/looping, and intraretinal microvascular abnormalities. PDR is characterized by retinal neovascularization, which may lead to vitreous hemorrhage, and fibrous tissue forming anterior to the retinal disc. Maculopathy is based on location rather than severity and is more common in Type II DM.
Management of diabetic retinopathy involves optimizing glycaemic control, blood pressure, and hyperlipidemia, as well as regular review by ophthalmology. Treatment options include intravitreal vascular endothelial growth factor (VEGF) inhibitors for maculopathy, regular observation for nonproliferative retinopathy, and panretinal laser photocoagulation and intravitreal VEGF inhibitors for proliferative retinopathy. Vitreoretinal surgery may be necessary in cases of severe or vitreous hemorrhage.
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This question is part of the following fields:
- Ophthalmology
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Question 8
Incorrect
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A 3-year-old girl is brought to her pediatrician with a 1 day history of limping on her left side. Her parents state that she has been healthy except for a recent cough and her daycare provider has not noticed any injuries. During the physical exam, the child appears uncomfortable and in pain, but has normal range of motion in her left hip. What is the best course of action for management at this point?
Your Answer: Provide simple analgesia and request bloods and a hip X-ray
Correct Answer: Urgent hospital assessment
Explanation:If a child under the age of 3 presents with an acute limp, it is crucial to arrange urgent assessment in secondary care. This is because they are at a higher risk of septic arthritis and child maltreatment, according to Nice Clinical Knowledge Summaries. Additionally, the diagnosis of transient synovitis should be made with extreme caution after ruling out serious causes of limp, as it is rare in this age group. Urgent referral for assessment is recommended due to the difficulty in examining and identifying subtle clinical signs.
Causes of Limping in Children
Limping in children can be caused by various factors, which may differ depending on the child’s age. One possible cause is transient synovitis, which has an acute onset and is often accompanied by viral infections. This condition is more common in boys aged 2-12 years. On the other hand, septic arthritis/osteomyelitis may cause a child to feel unwell and have a high fever. Juvenile idiopathic arthritis may cause a painless limp, while trauma can usually be diagnosed through the child’s history. Development dysplasia of the hip is usually detected in neonates and is six times more common in girls. Perthes disease, which is due to avascular necrosis of the femoral head, is more common in children aged 4-8 years. Finally, slipped upper femoral epiphysis may occur in children aged 10-15 years and is characterized by the displacement of the femoral head epiphysis postero-inferiorly. It is important to identify the cause of a child’s limp in order to provide appropriate treatment and prevent further complications.
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This question is part of the following fields:
- Paediatrics
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Question 9
Incorrect
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A 66-year-old patient presents to the emergency department with complaints of feeling unwell and pain in a wound on their left leg. The patient reports sustaining the injury 10 days ago when they accidentally burned their leg on a hot stove. They did not seek medical attention at the time as they believed the wound was not severe. The patient has been experiencing episodes of feeling hot and cold for the past three days and the pain in their leg has been increasing. They deny any cough, dysuria, or pain in other areas of their body. Upon examination, a deep partial thickness burn is observed on the patient's left leg with surrounding erythema and ascending lymphangitis tracking up past their left knee.
Investigations:
Investigation Result Normal value
White cell count (WCC) 14 × 109/l 3.6–11 × 109/l
C-reactive protein (CRP) 56 mg/l 0–10 mg/l
What would be the most appropriate course of action for this patient?Your Answer:
Correct Answer: IV antibiotics, keep NBM and discuss with regional burns referral centre
Explanation:Treatment Options for Infected Burn Wound
When dealing with an infected burn wound, it is important to consider the severity of the infection and the appropriate treatment options. In the case of a deep partial thickness burn with evidence of cellulitis, IV antibiotics are necessary and surgical debridement may be required. It is crucial to discuss the case with a regional burns referral centre for urgent transfer and further treatment. Blood cultures and a wound swab should be taken, and other sources of sepsis ruled out. Oral antibiotics or discharge without treatment are not sufficient options. Admitting for IV antibiotics and reviewing in 24 hours may be appropriate for simple cellulitis, but not for an infected burn wound. It is important to provide the appropriate treatment to prevent further complications and promote healing.
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This question is part of the following fields:
- Plastics
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Question 10
Incorrect
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A 62-years-old-man presents to the pulmonology clinic with a recent onset of ptosis in his right upper lid. He has been experiencing a chronic cough for the past three months, accompanied by streaks of blood. Upon radiological examination, an opacification is observed in the upper right part of his chest. The patient appears cachexic and unwell, with a BMI of 18 kg/m² and a fasting blood sugar level of 8.3 mmol/L. What other clinical findings may be present in this patient?
Your Answer:
Correct Answer: Right upper limb pain
Explanation:Patients with Pancoast tumours may experience shoulder pain and upper limb neurological signs, in addition to Horner’s syndrome, due to the tumour proximity to the brachial plexus. Therefore, the correct answer is right upper limb pain. Kussmaul breathing is an incorrect option as it is associated with metabolic acidosis, which is not present in this case. Lupus pernio is also an incorrect answer as it is more commonly seen in sarcoidosis rather than lung cancer. Opsoclonus-myoclonus syndrome is another incorrect option as it is a paraneoplastic syndrome typically associated with neuroblastoma in children.
Horner’s syndrome is a medical condition that is characterized by a set of symptoms including a small pupil (miosis), drooping of the upper eyelid (ptosis), sunken eye (enophthalmos), and loss of sweating on one side of the face (anhidrosis). The presence of heterochromia, or a difference in iris color, is often seen in cases of congenital Horner’s syndrome. Anhidrosis is also a distinguishing feature that can help differentiate between central, Preganglionic, and postganglionic lesions. Pharmacologic tests, such as the use of apraclonidine drops, can be helpful in confirming the diagnosis of Horner’s syndrome and localizing the lesion.
Central lesions, Preganglionic lesions, and postganglionic lesions can all cause Horner’s syndrome, with each type of lesion presenting with different symptoms. Central lesions can result in anhidrosis of the face, arm, and trunk, while Preganglionic lesions can cause anhidrosis of the face only. postganglionic lesions, on the other hand, do not typically result in anhidrosis.
There are many potential causes of Horner’s syndrome, including stroke, syringomyelia, multiple sclerosis, tumors, encephalitis, thyroidectomy, trauma, cervical rib, carotid artery dissection, carotid aneurysm, cavernous sinus thrombosis, and cluster headache. It is important to identify the underlying cause of Horner’s syndrome in order to determine the appropriate treatment plan.
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This question is part of the following fields:
- Ophthalmology
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Question 11
Incorrect
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A 50-year-old runner experiences chest pain and collapses while jogging. He is brought to the Emergency department within an hour. Upon arrival, he is conscious and given a sublingual nitrate which provides some relief. His heart rate is 90 beats per minute and his blood pressure is 120/85 mmHg. An ECG reveals 3 mm of ST segment elevation in leads II, III, AVF, V5 and V6. What is the most appropriate next step in managing this patient?
Your Answer:
Correct Answer: Admission for cardiac catheterisation and percutaneous transluminal coronary angioplasty
Explanation:Initial and Long-Term Treatment for Inferolateral ST-Elevation MI
The patient’s history and ECG findings suggest that they are experiencing an Inferolateral ST-elevation MI. The best initial treatment for this condition would be percutaneous coronary intervention. It is likely that the patient would have already received aspirin in the ambulance.
For long-term treatment, the patient will require dual antiplatelet therapy, such as aspirin and clopidogrel, a statin, a beta blocker, and an ACE-inhibitor. These medications will help manage the patient’s condition and prevent future cardiac events.
It is important to follow the NICE guideline for Acute Coronary Syndrome to ensure that the patient receives the appropriate treatment and care. By following these guidelines, healthcare professionals can help improve the patient’s prognosis and quality of life.
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This question is part of the following fields:
- Emergency Medicine
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Question 12
Incorrect
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A 42-year-old female patient complains of a slow onset of difficulty swallowing both solids and liquids. An upper GI endoscopy shows no abnormalities, and there is no visible swelling in the neck. A preliminary psychiatric evaluation reveals no issues. The on-call junior doctor suspects a psychological or functional cause. What signs would indicate an organic origin for the dysphagia?
Your Answer:
Correct Answer: Raynaud's phenomenon
Explanation:The relationship between Raynaud’s phenomenon and dysphagia is important in identifying potential underlying systemic diseases such as scleroderma. Raynaud’s phenomenon is a common symptom found in scleroderma, a systemic disease that can cause dysphagia and oesophageal dysmotility. While Raynaud’s phenomenon may be the only early manifestation of scleroderma, gastrointestinal involvement can also occur in the early stages. Therefore, the combination of Raynaud’s phenomenon with oesophageal symptoms should prompt further investigation for scleroderma.
Arthritis is not a specific cause of dysphagia-related illness, although it may occur in a variety of diseases. In scleroderma, arthralgia is more common than arthritis. Globus pharyngeus, the sensation of having something stuck in the throat, can cause severe distress, but despite extensive investigation, there is no known cause. Malar rash, found in systemic lupus erythematosus (SLE), is not associated with dysphagia. Weakness is a non-specific symptom that may be a manifestation of psychiatric illness or malnutrition as a consequence of dysphagia, and cannot guide further management.
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This question is part of the following fields:
- Gastroenterology
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Question 13
Incorrect
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A 86-year-old patient arrives at the Emergency Department complaining of epigastric pain and difficulty breathing. Upon examination, there is decreased airflow in the left base. A chest X-ray shows an air-fluid level located behind the mediastinum. What is the probable diagnosis?
Your Answer:
Correct Answer: Diaphragmatic hiatal hernia
Explanation:Diaphragmatic Hiatal Hernia
Diaphragmatic hiatal hernia is a condition where the fundus or gastro-oesophageal junction of the stomach herniates upwards in the chest due to an abnormal defect in the diaphragm. A chest X-ray may reveal gastric air and fluid behind the mediastinum, and reduced air entry at the lung bases due to compression of the lung lobes. Immediate management involves stabilizing the patient with ABCDE and seeking an urgent surgical review for a possible Nissen fundoplication.
Other conditions such as early cholangitis, aspiration pneumonia of the left lower lobe of the lung, ruptured left ventricle, or ruptured right ventricle may present with different symptoms and would not cause the air and fluid level behind the mediastinum seen in diaphragmatic hiatal hernia.
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This question is part of the following fields:
- Gastroenterology
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Question 14
Incorrect
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A 50-year-old male patient presents with dyspepsia of 4 weeks’ duration. Other than a 15-pack year history of smoking, he has no other medical history and reports no prescribed or over-the-counter medications. Endoscopy reveals features of gastritis and a solitary gastric ulcer in the pyloric antrum. A rapid urease test turned red, revealing a positive result.
What would be a suitable treatment for this patient?Your Answer:
Correct Answer: Amoxicillin, clarithromycin and omeprazole
Explanation:Diagnosis and Treatment of Helicobacter pylori Infection
Helicobacter pylori is a Gram-negative bacillus that causes chronic gastritis and can lead to ulceration if left untreated. Diagnosis of H. pylori infection can be done through a rapid urease test, which detects the presence of the enzyme urease produced by the bacterium. Treatment for H. pylori infection involves a 7-day course of two antibiotics and a proton pump inhibitor (PPI). Fluconazole, prednisolone and azathioprine, and quinine and clindamycin are not appropriate treatments for H. pylori infection. Combination drug therapy is common to reduce the risk of resistance in chronic infections. Repeat testing should be done after treatment to ensure clearance of the infection.
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This question is part of the following fields:
- Gastroenterology
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Question 15
Incorrect
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Sarah is a 28-year-old woman who underwent cervical cancer screening 12 months ago and the result showed positive for high-risk human papillomavirus (hrHPV) with a negative cytology report.
She has now undergone a repeat smear and the result is once again positive for hrHPV with a negative cytology report.
What would be the most suitable course of action to take next?Your Answer:
Correct Answer: Repeat sample in 12 months
Explanation:According to NICE guidelines for cervical cancer screening, if the first repeat smear at 12 months is still positive for high-risk human papillomavirus (hrHPV), the next step is to repeat the smear 12 months later (i.e. at 24 months). If the patient remains hrHPV positive but cytology negative at 12 months, they should have another HPV test in a further 12 months. If the patient becomes hrHPV negative at 24 months, they can return to routine recall. However, if they remain hrHPV positive, cytology negative or inadequate at 24 months, they should be referred to colposcopy.
The cervical cancer screening program has evolved to include HPV testing, which allows for further risk stratification. A negative hrHPV result means a return to normal recall, while a positive result requires cytological examination. Abnormal cytology results lead to colposcopy, while normal cytology results require a repeat test at 12 months. Inadequate samples require a repeat within 3 months, and two consecutive inadequate samples lead to colposcopy. Treatment for CIN typically involves LLETZ or cryotherapy. Individuals who have been treated for CIN should be invited for a test of cure repeat cervical sample 6 months after treatment.
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This question is part of the following fields:
- Gynaecology
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Question 16
Incorrect
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A 20-year-old woman arrives at the Emergency Department in Nepal. She had flown from the United Kingdom the previous day for a hiking trip with her friends. She reports feeling light-headed and dizzy in the hotel lobby in the morning. Despite taking a short rest, she continues to feel unwell and complains of nausea and a generalised dull headache. She is overweight and has no history of migraine. Although she is well oriented, she feels that her nausea and headache are getting worse.
What would be the most appropriate course of action for managing this patient?Your Answer:
Correct Answer: Administer oxygen and acetazolamide
Explanation:Treatment Options for Acute Mountain Sickness
Acute mountain sickness (AMS) is a common condition that can occur when ascending to high altitudes without proper acclimatization. Symptoms include nausea, headache, difficulty breathing, and dizziness. Here are some treatment options for AMS:
Administer oxygen and acetazolamide: Low-flow oxygen and acetazolamide can effectively relieve symptoms of AMS. Dexamethasone is also an alternative to acetazolamide.
Antiemetics and a dose of prophylactic antibiotics: These can help relieve symptoms in mild cases, but are not sufficient for moderate to severe cases.
Nifedipine: This medication may be effective in treating high-altitude pulmonary edema, but has no role in treating AMS.
Non-steroidal anti-inflammatory drugs (NSAIDs) and bed rest: NSAIDs can provide symptomatic relief, but cannot cure the underlying cause of AMS.
Transfer the patient immediately to a location at lower altitude: Descent is always an effective treatment for AMS, but is not necessary unless symptoms are intractable or there is suspicion of illness progression.
Treatment Options for Acute Mountain Sickness
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This question is part of the following fields:
- Acute Medicine And Intensive Care
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Question 17
Incorrect
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At a multidisciplinary meeting, the nutritional concerns of a 70-year-old patient on the oncology ward are being discussed. The patient is currently undergoing chemotherapy and radiotherapy for pancreatic cancer and has been experiencing a significant decrease in appetite and body mass index, which now sits at 17 kg/m². Nurses have reported that the patient has not been eating meals. The dietician team suggests discussing the risks and benefits of parenteral nutrition before involving the patient's family. This form of nutrition is expected to continue for the next few weeks. Which blood vessel would be suitable for administering parenteral nutrition?
Your Answer:
Correct Answer: Subclavian vein
Explanation:Total parenteral nutrition must be administered through a central vein due to its high phlebitic nature. This type of nutrition is considered full nutrition and should only be given for more than 10 days. If it is only used to supplement enteral feeding or for a short period, peripheral parenteral nutrition may be an option. The reason for using a central vein is that TPN is hypertonic to blood and has a high osmolality, which can increase the risk of phlebitis. Central veins are larger, have higher flow rates, and fewer valves than peripheral veins, making them more suitable for TPN administration. The subclavian vein is an example of a central vein that can be used for this purpose. The external jugular veins, hepatic portal vein, superior mesenteric artery, and pulmonary arteries are not appropriate for TPN administration.
Nutrition Options for Surgical Patients
When it comes to providing nutrition for surgical patients, there are several options available. The easiest and most common option is oral intake, which can be supplemented with calorie-rich dietary supplements. However, this may not be suitable for all patients, especially those who have undergone certain procedures.
nasogastric feeding is another option, which involves administering feed through a fine bore nasogastric feeding tube. While this method may be safe for patients with impaired swallow, there is a risk of aspiration or misplaced tube. It is also usually contra-indicated following head injury due to the risks associated with tube insertion.
Naso jejunal feeding is a safer alternative as it avoids the risk of feed pooling in the stomach and aspiration. However, the insertion of the feeding tube is more technically complicated and is easiest if done intra-operatively. This method is safe to use following oesophagogastric surgery.
Feeding jejunostomy is a surgically sited feeding tube that may be used for long-term feeding. It has a low risk of aspiration and is thus safe for long-term feeding following upper GI surgery. However, there is a risk of tube displacement and peritubal leakage immediately following insertion, which carries a risk of peritonitis.
Percutaneous endoscopic gastrostomy is a combined endoscopic and percutaneous tube insertion method. However, it may not be technically possible in patients who cannot undergo successful endoscopy. Risks associated with this method include aspiration and leakage at the insertion site.
Finally, total parenteral nutrition is the definitive option for patients in whom enteral feeding is contra-indicated. However, individualised prescribing and monitoring are needed, and it should be administered via a central vein as it is strongly phlebitic. Long-term use is associated with fatty liver and deranged LFTs.
In summary, there are several nutrition options available for surgical patients, each with its own benefits and risks. The choice of method will depend on the patient’s individual needs and circumstances.
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This question is part of the following fields:
- Surgery
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Question 18
Incorrect
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A fifty-six-year-old man visits his GP with complaints of recurring headaches and limb pain that have persisted for six months. Despite taking ibuprofen and paracetamol, he has not experienced any relief. The headaches occur without any preceding symptoms, last for less than an hour, and do not cause dizziness or nausea. They occur 4-6 times per day. Additionally, he has noticed a loss of hearing in his left ear. The GP conducts some blood tests, which reveal elevated alkaline phosphatase (ALP), normal calcium, normal phosphate, and normal thyroid hormone levels. Based on the most probable diagnosis, what is the most appropriate treatment?
Your Answer:
Correct Answer: Bisphosphonates
Explanation:The preferred treatment for Paget’s disease of the bone is bisphosphonates, which inhibit osteoblastic activity. This patient’s symptoms, including bone pain, headaches, and hearing loss, along with elevated ALP levels, suggest a diagnosis of Paget’s disease. While calcium supplements may be useful for other conditions, they are not indicated for Paget’s disease, as calcium levels are typically normal. Triptans, codeine, and a Cochlear implant are also not appropriate treatments for this condition.
Understanding Paget’s Disease of the Bone
Paget’s disease of the bone is a condition characterized by increased and uncontrolled bone turnover. It is believed to be caused by excessive osteoclastic resorption followed by increased osteoblastic activity. Although it is a common condition, affecting 5% of the UK population, only 1 in 20 patients experience symptoms. The most commonly affected areas are the skull, spine/pelvis, and long bones of the lower extremities. Predisposing factors include increasing age, male sex, northern latitude, and family history.
Symptoms of Paget’s disease include bone pain, particularly in the pelvis, lumbar spine, and femur. The stereotypical presentation is an older male with bone pain and an isolated raised alkaline phosphatase (ALP). Classical, untreated features include bowing of the tibia and bossing of the skull. Diagnosis is made through blood tests, which show raised ALP, and x-rays, which reveal osteolysis in early disease and mixed lytic/sclerotic lesions later.
Treatment is indicated for patients experiencing bone pain, skull or long bone deformity, fracture, or periarticular Paget’s. Bisphosphonates, either oral risedronate or IV zoledronate, are the preferred treatment. Calcitonin is less commonly used now. Complications of Paget’s disease include deafness, bone sarcoma (1% if affected for > 10 years), fractures, skull thickening, and high-output cardiac failure.
Overall, understanding Paget’s disease of the bone is important for early diagnosis and management of symptoms and complications.
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This question is part of the following fields:
- Musculoskeletal
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Question 19
Incorrect
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A 22-year-old patient comes to your clinic after receiving a positive pregnancy test result. She has made the decision to have an abortion after discussing it with her partner and family. However, as a healthcare provider, you personally do not support abortion and are currently treating patients who are struggling with infertility. How should you handle this challenging consultation?
Your Answer:
Correct Answer: Discuss her options and explain that due to your personal beliefs, you will arrange for her to see another doctor in this instance who will make necessary arrangements
Explanation:According to Good Medical Practice (2013), if you have a conscientious objection to a particular procedure, it is your responsibility to inform your patients and explain their right to see another doctor. You must provide them with sufficient information to exercise this right without expressing any disapproval of their lifestyle, choices, or beliefs. It is important to ensure that your personal views do not unfairly discriminate against patients or colleagues and do not affect the treatment you provide or arrange.
Termination of Pregnancy in the UK
The UK’s current abortion law is based on the 1967 Abortion Act, which was amended in 1990 to reduce the upper limit for termination from 28 weeks to 24 weeks gestation. To perform an abortion, two registered medical practitioners must sign a legal document, except in emergencies where only one is needed. The procedure must be carried out by a registered medical practitioner in an NHS hospital or licensed premise.
The method used to terminate a pregnancy depends on the gestation period. For pregnancies less than nine weeks, mifepristone (an anti-progesterone) is administered, followed by prostaglandins 48 hours later to stimulate uterine contractions. For pregnancies less than 13 weeks, surgical dilation and suction of uterine contents is used. For pregnancies more than 15 weeks, surgical dilation and evacuation of uterine contents or late medical abortion (inducing ‘mini-labour’) is used.
The 1967 Abortion Act outlines the circumstances under which a person shall not be guilty of an offence under the law relating to abortion. These include if two registered medical practitioners are of the opinion, formed in good faith, that the pregnancy has not exceeded its 24th week and that the continuance of the pregnancy would involve risk, greater than if the pregnancy were terminated, of injury to the physical or mental health of the pregnant woman or any existing children of her family. The limits do not apply in cases where it is necessary to save the life of the woman, there is evidence of extreme fetal abnormality, or there is a risk of serious physical or mental injury to the woman.
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This question is part of the following fields:
- Gynaecology
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Question 20
Incorrect
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After an emergency Caesarian-section for foetal distress, the consultant obstetrician hands the paediatrician a normal term female infant. You observe that the infant is apnoeic, floppy and blue in colour.
What would be your initial step?Your Answer:
Correct Answer: Dry the neonate
Explanation:According to UK resuscitation guidelines, the first step in neonatal resuscitation is to dry the baby, remove any wet towels, and note the time. Within 30 seconds, an Apgar assessment should be conducted to evaluate the baby’s tone, breathing, and heart rate. If the baby is gasping or not breathing, the airway should be opened, and 5 inflation breaths should be given within 60 seconds. If there is no increase in heart rate, chest movement should be checked. If the chest is not moving, the head position should be rechecked, and other airway maneuvers should be considered. Inflation breaths should be repeated, and a response should be looked for. If there is still no increase in heart rate, chest compressions should be started with 3 compressions to each breath. The heart rate should be reassessed every 30 seconds. If the heart rate is still slow or undetectable, venous access and drugs should be considered. Atropine and intubation are later steps in the management.
The Apgar score is a tool used to evaluate the health of a newborn baby. It is recommended by NICE to be assessed at 1 and 5 minutes after birth, and again at 10 minutes if the initial score is low. The score is based on five factors: pulse, respiratory effort, color, muscle tone, and reflex irritability. A score of 0-3 is considered very low, 4-6 is moderate low, and 7-10 indicates that the baby is in good health. The score helps healthcare professionals quickly identify any potential issues and provide appropriate care.
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This question is part of the following fields:
- Paediatrics
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Question 21
Incorrect
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What is the most suitable course of action for a 33-year-old man who has an extracapsular fractured neck of femur?
Your Answer:
Correct Answer: Dynamic hip screw
Explanation:Fractured Neck of Femur in Elderly Patients
Fractured neck of femur is a common injury that causes morbidity and mortality in elderly patients. This type of fracture occurs between the head and trochanteric region of the femur and can also occur in younger patients due to trauma or associated conditions. The fracture can be displaced or nondisplaced, and intracapsular or extracapsular.
For displaced fractures, there are two treatment strategies: reduction and fixation or replacement of the head and neck of the femur with a prosthesis. Physiologically younger and active patients with displaced extracapsular fractures should be treated with reduction and fixation, often with a dynamic hip screw. However, there is a risk of further surgery if the hip develops painful avascular necrosis, which may not be avoided despite the best surgical treatment. Displaced intracapsular fractures in younger patients are not straightforward to manage, and a total hip replacement may be considered.
In older patients, displaced fractures are best treated with replacement of the head and neck of the femur to avoid potential further surgery. It is important for patients to understand the risks and benefits of each treatment option and to work with their healthcare provider to determine the best course of action.
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This question is part of the following fields:
- Surgery
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Question 22
Incorrect
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Each one of the following is a feature of organophosphate poisoning, except for which one?
Your Answer:
Correct Answer: Mydriasis
Explanation:Understanding Organophosphate Insecticide Poisoning
Organophosphate insecticide poisoning is a condition that occurs when there is an accumulation of acetylcholine in the body, leading to the inhibition of acetylcholinesterase. This, in turn, causes an upregulation of nicotinic and muscarinic cholinergic neurotransmission. In warfare, sarin gas is a highly toxic synthetic organophosphorus compound that has similar effects. The symptoms of organophosphate poisoning can be remembered using the mnemonic SLUD, which stands for salivation, lacrimation, urination, and defecation/diarrhea. Other symptoms include hypotension, bradycardia, small pupils, and muscle fasciculation.
The management of organophosphate poisoning involves the use of atropine, which helps to counteract the effects of acetylcholine. However, the role of pralidoxime in the treatment of this condition is still unclear. Meta-analyses conducted to date have failed to show any clear benefit of pralidoxime in the management of organophosphate poisoning.
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This question is part of the following fields:
- Pharmacology
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Question 23
Incorrect
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A 35-year-old female presents with pain and stiffness in her left knee, which she’s had for the last 4 months. On further questioning, she also has pain and stiffness in her right wrist and the distal interphalangeal joint of her left index finger. Her symptoms are worse in the morning and seem to improve throughout the day. She reports that her late mother also had joint problems; but does not know the diagnosis, although she recalls that her fingers were completely swollen before she started treatment.
What is the most likely diagnosis?Your Answer:
Correct Answer: Psoriatic arthritis
Explanation:In many instances, arthritis symptoms are identified prior to the onset of psoriasis. Symmetrical polyarthritis is a common manifestation of rheumatoid arthritis.
Psoriatic arthropathy is a type of inflammatory arthritis that is associated with psoriasis. It is classified as one of the seronegative spondyloarthropathies and is known to have a poor correlation with cutaneous psoriasis. In fact, it often precedes the development of skin lesions. This condition affects both males and females equally, with around 10-20% of patients with skin lesions developing an arthropathy.
The presentation of psoriatic arthropathy can vary, with different patterns of joint involvement. The most common type is symmetric polyarthritis, which is very similar to rheumatoid arthritis and affects around 30-40% of cases. Asymmetrical oligoarthritis is another type, which typically affects the hands and feet and accounts for 20-30% of cases. Sacroiliitis, DIP joint disease, and arthritis mutilans (severe deformity of fingers/hand) are other patterns of joint involvement. Other signs of psoriatic arthropathy include psoriatic skin lesions, periarticular disease, enthesitis, tenosynovitis, dactylitis, and nail changes.
To diagnose psoriatic arthropathy, X-rays are often used. These can reveal erosive changes and new bone formation, as well as periostitis and a pencil-in-cup appearance. Management of this condition should be done by a rheumatologist, and treatment is similar to that of rheumatoid arthritis. However, there are some differences, such as the use of monoclonal antibodies like ustekinumab and secukinumab. Mild peripheral arthritis or mild axial disease may be treated with NSAIDs alone, rather than all patients being on disease-modifying therapy as with RA. Overall, psoriatic arthropathy has a better prognosis than RA.
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This question is part of the following fields:
- Musculoskeletal
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Question 24
Incorrect
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A 42-year-old woman has visited her doctor to discuss her plans of getting pregnant. She is seeking guidance on basic lifestyle modifications and medications she should be taking. The doctor advises her to take a high dose (5 mg) of folic acid. What is the rationale behind taking high dose folic acid?
Your Answer:
Correct Answer: BMI >30
Explanation:High dose 5mg folic acid should be prescribed to pregnant women with obesity (BMI >30 kg/m2) to reduce the risk of neural tube defects (NTD). Other factors that may require high dose folic acid include a history of NTD in a previous pregnancy or family history of NTD, as well as conditions such as antiepileptic drug use, coeliac disease, diabetes, and thalassaemia trait.
Folic Acid: Importance, Deficiency, and Prevention
Folic acid is a vital nutrient that is converted to tetrahydrofolate (THF) in the body. It is found in green, leafy vegetables and plays a crucial role in the transfer of 1-carbon units to essential substrates involved in the synthesis of DNA and RNA. However, certain factors such as phenytoin, methotrexate, pregnancy, and alcohol excess can cause a deficiency in folic acid. This deficiency can lead to macrocytic, megaloblastic anemia and neural tube defects.
To prevent neural tube defects during pregnancy, it is recommended that all women take 400mcg of folic acid until the 12th week of pregnancy. Women at higher risk of conceiving a child with a neural tube defect should take 5mg of folic acid from before conception until the 12th week of pregnancy. Women are considered higher risk if they or their partner has a neural tube defect, they have had a previous pregnancy affected by a neural tube defect, or they have a family history of a neural tube defect. Additionally, women with certain medical conditions such as coeliac disease, diabetes, or thalassaemia trait, or those taking antiepileptic drugs, or who are obese (BMI of 30 kg/m2 or more) are also considered higher risk.
In summary, folic acid is an essential nutrient that plays a crucial role in DNA and RNA synthesis. Deficiency in folic acid can lead to serious health consequences, including neural tube defects. However, taking folic acid supplements during pregnancy can prevent these defects and ensure a healthy pregnancy.
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This question is part of the following fields:
- Obstetrics
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Question 25
Incorrect
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A 68-year-old retired electrical engineer had a gradual decline in initiating and performing voluntary movements. His face was expressionless and he had tremors, which were particularly obvious when he was sat idle watching tv. He also showed a marked decrease in blinking frequency but had no evidence of dementia.
What is the most probable diagnosis associated with these symptoms?Your Answer:
Correct Answer: Parkinson’s disease
Explanation:Movement Disorders and Neurodegenerative Diseases: A Brief Overview
Movement disorders and neurodegenerative diseases are conditions that affect the nervous system and can lead to a range of symptoms, including tremors, rigidity, and difficulty with voluntary movements. Parkinson’s disease is a common neurodegenerative disease that primarily affects the elderly and is characterized by hypokinesia, bradykinesia, resting tremor, rigidity, lack of facial expression, and decreased blinking frequency. While there is no cure for Parkinson’s disease, current treatment strategies involve the administration of L-dopa, which is metabolized to dopamine within the brain and can help stimulate the initiation of voluntary movements.
Huntington’s disease is another neurodegenerative disease that typically presents in middle-aged patients and is characterized by movement disorders, seizures, dementia, and ultimately death. Alzheimer’s disease is a degenerative disorder that can also lead to dementia, but it is not typically associated with movement disorders like Parkinson’s or Huntington’s disease.
In rare cases, damage to the subthalamic nucleus can cause movement disorders like ballism and hemiballism, which are characterized by uncontrolled movements of the limbs on the contralateral side of the body. While these conditions are rare, they highlight the complex interplay between different regions of the brain and the importance of understanding the underlying mechanisms of movement disorders and neurodegenerative diseases.
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This question is part of the following fields:
- Neurology
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Question 26
Incorrect
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A 50-year-old male with a history of heavy alcohol consumption presents with sudden onset epigastric pain that spreads to the right side. During examination, his sclera appear yellow, and he experiences tenderness in the right upper quadrant of his abdomen with localized guarding. His vital signs are as follows: heart rate 95/min, blood pressure 80/50 mmHg, saturation 99% on 2L, temperature 39.5ºC, and Glasgow coma score 14/15 (confused speech). Which of the following diagnoses could account for these symptoms?
Your Answer:
Correct Answer: Ascending cholangitis
Explanation:Charcot’s cholangitis triad consists of three symptoms: fever, jaundice, and right upper quadrant pain. Meanwhile, Reynolds Pentad, which includes jaundice, right upper quadrant pain, fever/rigors, shock, and altered mental status, is linked to ascending cholangitis. Before conducting further investigations on the biliary tree, such as ultrasound or magnetic resonance cholangiopancreatography for common bile duct stones, or endoscopic retrograde cholangiopancreatography, the patient must first receive adequate resuscitation.
Understanding Ascending Cholangitis
Ascending cholangitis is a bacterial infection that affects the biliary tree, with E. coli being the most common culprit. This condition is often associated with gallstones, which can predispose individuals to the infection. Patients with ascending cholangitis may present with Charcot’s triad, which includes fever, right upper quadrant pain, and jaundice. However, this triad is only present in 20-50% of cases. Other common symptoms include hypotension and confusion. In severe cases, Reynolds’ pentad may be observed, which includes the additional symptoms of hypotension and confusion.
To diagnose ascending cholangitis, ultrasound is typically used as a first-line investigation to look for bile duct dilation and stones. Raised inflammatory markers may also be observed. Treatment involves intravenous antibiotics and endoscopic retrograde cholangiopancreatography (ERCP) after 24-48 hours to relieve any obstruction.
Overall, ascending cholangitis is a serious condition that requires prompt diagnosis and treatment. Understanding the symptoms and risk factors associated with this condition can help individuals seek medical attention early and improve their chances of a successful recovery.
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This question is part of the following fields:
- Surgery
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Question 27
Incorrect
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A 35-year-old woman with G4P3 at 39 weeks gestation presents to the labour ward following a spontaneous rupture of membranes. She delivers a healthy baby vaginally but experiences excessive bleeding and hypotension. Despite attempts to control the bleeding, the senior doctor decides to perform a hysterectomy. Upon examination, the pathologist observes that the chorionic villi have deeply invaded the myometrium but not the perimetrium.
What is the diagnosis?Your Answer:
Correct Answer: Placenta increta
Explanation:The correct answer is placenta increta, where the chorionic villi invade the myometrium but not the perimetrium. The patient’s age and history of multiple pregnancies increase the risk of this abnormal placentation, which can be diagnosed through pathological studies. Placenta accreta, percreta, and previa are incorrect answers, as they involve different levels of placental attachment and can cause different symptoms.
Understanding Placenta Accreta
Placenta accreta is a condition where the placenta attaches to the myometrium instead of the decidua basalis, which can lead to postpartum hemorrhage. This condition is caused by a defective decidua basalis. There are three types of placenta accreta, which are categorized based on the degree of invasion. The first type is accreta, where the chorionic villi attach to the myometrium. The second type is increta, where the chorionic villi invade into the myometrium. The third type is percreta, where the chorionic villi invade through the perimetrium.
There are certain risk factors that increase the likelihood of developing placenta accreta, such as having a previous caesarean section or placenta previa. It is important for healthcare providers to be aware of these risk factors and monitor patients closely during pregnancy and delivery. Early detection and management of placenta accreta can help prevent complications and ensure the best possible outcome for both the mother and baby.
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This question is part of the following fields:
- Obstetrics
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Question 28
Incorrect
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A newborn delivered at 36 weeks gestation through a normal vaginal delivery is exhibiting irritability and has experienced a convulsion 72 hours after birth. No visible head trauma or swelling is present. What type of cranial injury is most probable in this case?
Your Answer:
Correct Answer: Intraventricular haemorrhage
Explanation:Caput succedaneum is a condition that occurs when pressure is applied to the fetal scalp during birth, resulting in a swollen and bruised area. This condition typically resolves on its own within a few days and does not require treatment.
Cephalohaematoma, on the other hand, can occur after a vaginal delivery or due to trauma from obstetric tools. This condition results in bleeding between the skull and the periosteum, causing a tense swelling that is limited to the outline of the bone. Cephalohaematoma typically resolves over a period of weeks to months.
Subaponeurotic haemorrhage, also known as subgaleal haemorrhage, is a rare condition that can occur due to a traumatic birth. This condition can result in significant blood loss in the infant.
Intracranial haemorrhage refers to bleeding within the brain, including subarachnoid, subdural, and intraventricular haemorrhages. Subarachnoid haemorrhages are common and can cause irritability and convulsions in the first few days of life. Subdural haemorrhages can occur due to the use of forceps during delivery. Intraventricular haemorrhages are most common in preterm infants and can be diagnosed using ultrasound examinations.
Understanding Intraventricular Haemorrhage
Intraventricular haemorrhage is a rare condition that involves bleeding into the ventricular system of the brain. While it is typically associated with severe head injuries in adults, it can occur spontaneously in premature neonates. In fact, the majority of cases occur within the first 72 hours after birth. The exact cause of this condition is not well understood, but it is believed to be a result of birth trauma and cellular hypoxia in the delicate neonatal central nervous system.
Treatment for intraventricular haemorrhage is largely supportive, as therapies such as intraventricular thrombolysis and prophylactic cerebrospinal fluid drainage have not been shown to be effective. However, if hydrocephalus and rising intracranial pressure occur, shunting may be necessary. It is important for healthcare professionals to be aware of this condition and its potential complications in order to provide appropriate care for affected patients.
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This question is part of the following fields:
- Paediatrics
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Question 29
Incorrect
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A 50-year-old man with a prolonged history of alcohol abuse complains of fatigue and general discomfort. Upon examination, his liver function tests are abnormal, and he is referred to a specialist who diagnoses him with alcohol-related cirrhosis. What is the main pathophysiological mechanism involved in alcoholic cirrhosis?
Your Answer:
Correct Answer: Fibrosis resulting in disruption of normal liver architecture
Explanation:Alcoholic Liver Disease: Understanding the Pathophysiology
Alcoholic liver disease is a spectrum of liver disease that can lead to serious complications if left untreated. Understanding the pathophysiology of this condition is crucial in managing and preventing its progression.
The primary pathological process in alcoholic liver disease is fibrosis, which results in the disruption of normal liver architecture. This leads to distortion of hepatic vasculature, increased intrahepatic resistance, and portal hypertension. Cirrhosis of the liver is an irreversible process and can lead to liver failure if the patient continues to drink alcohol.
Deposition of excess lipids in hepatocytes is another common feature of alcoholic liver disease. This causes steatohepatitis and is reversible. It is associated with metabolic syndrome.
Portal hypertension is a complication of alcoholic cirrhosis due to increased vascular resistance within the liver. It can result in oesophageal varices, which, if ruptured, can cause a large upper gastrointestinal bleed.
Contrary to popular belief, alcohol exposure does not cause cell death directly.
Sclerosis of the intra- and extrahepatic bile ducts is a pathophysiological process in primary sclerosing cholangitis. It causes inflammation, fibrosis, and strictures of the bile ducts and has a strong association with ulcerative colitis.
In summary, understanding the pathophysiology of alcoholic liver disease is crucial in managing and preventing its progression. Fibrosis, lipid deposition, portal hypertension, and bile duct sclerosis are all important features of this condition.
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This question is part of the following fields:
- Gastroenterology
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Question 30
Incorrect
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An 87-year-old man is brought into the emergency department by ambulance. He was found on his bathroom floor early this morning by his caregiver. He fell over last night, and had been unable to get up since then. He is now complaining of generalised aches and pains. He has no past medical history and does not take any regular medications.
On examination, he is cold and appears frail; he has a heart rate of 70/minute, and a blood pressure of 130/80 mmHg. His urine is also “muddy-looking'.
Blood tests showed the following:
pH 7.29
Bicarbonate 15 mmol/l
Creatine kinase 1559 u/l
Creatinine 301 µmol/l
Potassium 5.7 mmol/l
Routine blood tests a few weeks ago showed:
pH 7.41
Bicarbonate 27 mmol/l
Creatine kinase 99 u/l
Creatinine 61 µmol/l
Potassium 4.2 mmol/l
What is the underlying pathophysiology of this patient’s acute kidney injury (AKI)?Your Answer:
Correct Answer: Acute tubular necrosis
Explanation:The patient’s symptoms and history strongly suggest that their AKI is caused by rhabdomyolysis, which can lead to acute tubular necrosis. The patient’s prolonged immobility, muscle pain, and discolored urine (due to myoglobinuria) support this diagnosis, as does the metabolic acidosis seen on the VBG. The fact that the patient had normal kidney function just a few weeks ago suggests that this is an AKI rather than CKD. Renal artery stenosis is unlikely given the absence of hypertension, atherosclerosis, and antihypertensive medication use. While some forms of glomerulonephritis can cause a rapidly progressive AKI, the patient has not reported any other symptoms (such as hemoptysis) that would suggest this as a cause. Chronic interstitial nephritis typically results in a gradual decline in kidney function, which is not consistent with the patient’s rapid deterioration.
Acute tubular necrosis (ATN) is a common cause of acute kidney injury (AKI) that affects the functioning of the kidney by causing necrosis of renal tubular epithelial cells. The condition is reversible in its early stages if the cause is removed. There are two main causes of ATN: ischaemia and nephrotoxins. Ischaemia can be caused by shock or sepsis, while nephrotoxins can be caused by aminoglycosides, myoglobin secondary to rhabdomyolysis, radiocontrast agents, or lead. Features of ATN include raised urea, creatinine, and potassium levels, as well as muddy brown casts in the urine. Histopathological features include tubular epithelium necrosis, dilation of the tubules, and necrotic cells obstructing the tubule lumen. ATN has three phases: the oliguric phase, the polyuric phase, and the recovery phase.
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This question is part of the following fields:
- Surgery
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