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Question 1
Incorrect
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A 65-year-old patient, with advanced liver cirrhosis and a diagnosis of hepatocellular carcinoma, is experiencing intense back pain. Considering his liver dysfunction, which medication would be the most appropriate for pain relief?
Your Answer: Pethidine
Correct Answer: Fentanyl
Explanation:Safe and Unsafe Pain Medications for Patients with Chronic Liver Disease
Patients with chronic liver disease or cirrhosis require special consideration when it comes to pain management. Some pain medications can cause histamine release, haemodynamic disturbance, altered bioavailability, and accumulation of toxic metabolites and intermediates. Here are some examples:
Safe Choices:
– Fentanyl: causes less histamine release and haemodynamic disturbance than other opiates.
– Acetaminophen: does not cause liver damage when used in recommended doses.Unsafe Choices:
– Codeine: should be avoided due to the risk of altered bioavailability and elevated risk of accumulation of toxic metabolites and intermediates.
– Pethidine: there is an increased risk of accumulation when opioids are used in patients with liver impairment.
– Tramadol: has the same risks associated with pethidine and codeine in liver impairment.It is also important to note that non-steroidal anti-inflammatory drugs (NSAIDs) and aspirin should be avoided in patients with chronic liver disease and cirrhosis. Always consult with a healthcare provider before taking any pain medication.
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This question is part of the following fields:
- Pharmacology
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Question 2
Incorrect
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A middle-aged homeless man in his early 50s is brought to the emergency department with a six hour history of profuse vomiting. He complains of nausea and headache.
The history available is sketchy. He is of no fixed abode and denies having any previous medical problems. He appears unkempt and is confused - oriented to person but not time or place. He is afebrile. His breath smells of ketones.
Twelve hours after admission his condition deteriorates. He complains of blurred vision and his pupils are fixed and dilated; his respiratory rate increases sharply over the next few minutes and he becomes unconscious.
Investigations show:
Hb 138 g/L (130-180)
WCC 7.1 Ă109/L (4-11)
Platelets 401 Ă109/L (150-400)
Plasma sodium 135 mmol/L (137-144)
Plasma potassium 5.0 mmol/L (3.5-4.9)
Plasma urea 5.8 mmol/L (2.5-7.5)
Plasma creatinine 110 ”mol/L (60-110)
Plasma chloride 100 mmol/L (95-107)
Plasma bicarbonate 12 mmol/L (20-28)
Plasma glucose 5.5 mmol/L (3.0-6.0)
Plasma lactate 4.1 mmol/L (0.6-1.7)
PaO2 12 kPa (11.3-12.6)
PaCO2 4.2 kPa (4.7-6.0)
pH 7.22 (7.36-7.44)
Urine microscopy Crystals seen
What is the calculated anion gap in this case?Your Answer: 12 mmol/L
Correct Answer: 28 mmol/L
Explanation:Methanol Toxicity: Symptoms, Diagnosis, and Treatment
Methanol toxicity is the most likely diagnosis for a patient presenting with symptoms such as nausea, vomiting, headache, and confusion. Early signs of toxicity are caused by methanol, while later signs are due to its metabolite, formic acid. The laboratory data shows a high gap metabolic acidosis, which can be diagnosed early by measuring the serum methanol and serum formate levels. Anion gap, which is the difference between positively charged ions and negatively charged ions in the blood, is elevated but lactate levels do not account for it.
Treatment for methanol toxicity involves eliminating formic acid through alkaline diuresis or haemodialysis, correcting acidosis with IV bicarbonate, and preventing the metabolism of methanol to formic acid by administering IV ethanol. Early diagnosis and treatment are crucial in preventing further complications such as metabolic acidosis and retinal injury.
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This question is part of the following fields:
- Emergency Medicine
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Question 3
Incorrect
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A mother brings her 9-month-old son Henry to the Emergency Department (ED) at 0700 h. She is very concerned. She reports that he has been crying all night. She has two older children: a 4-year-old daughter Allison and a 2-year-old son James, who are both well. Henry was born at 40+1 weeks by normal vaginal delivery. She developed gestational diabetes, but there were no other complications during the pregnancy or birth. Henry has had all his vaccinations. He was breastfed until 6 months old, then bottle-fed. Mother reports that he has been crying non-stop since 0400 h this morning. She tried to feed him, but he vomited twice, minutes after the feed. The first vomit contained food only, the second time it was greenish. Mom has not noticed a change in faeces or urine, except that she has not had to change his nappies since last night. On examination: crying, warm and well perfused, heart rate 150 beats per minute (bpm), abdomen appears distended with tinkling bowel sounds. When you look in his nappies, you notice his stools look like redcurrant jelly.
What is the most likely diagnosis?Your Answer: Duodenal atresia
Correct Answer: Intussusception
Explanation:Common Causes of Bowel Obstruction in Children
Bowel obstruction in children can be caused by various conditions, each with its own distinct features and treatment options. Here are some of the most common causes of bowel obstruction in children:
1. Intussusception: This occurs when one segment of the bowel telescopes into another segment, leading to obstruction. It is most common in children aged 6-9 months and may be idiopathic or viral in origin. Symptoms include bilious vomiting, distended abdomen, tinkling bowel sounds, and redcurrant jelly stools. Air enema is the preferred treatment.
2. Congenital hypertrophic pyloric stenosis: This is a gastric outlet obstruction that typically presents at around 3 weeks of life. It is caused by hypertrophy of the pylorus and leads to non-bilious projectile vomiting and a palpable olive mass in the epigastric region. Surgical excision is the treatment of choice.
3. Meconium obstruction: This occurs only in newborns and is characterized by failure to pass meconium, bilious vomiting, and abdominal distension. It is more common in babies with cystic fibrosis. Diagnosis can be made prenatally or shortly after birth, and treatment involves radiographic contrast enema or surgery.
4. Ileus: This is aperistaltic bowel caused by factors such as abdominal surgery, electrolyte disturbances, or infection. It presents similarly to mechanical obstruction but is unlikely to be the cause if the child was previously well and has not had recent surgery.
5. Duodenal atresia: This is a type of bowel obstruction that occurs only in neonates and is associated with Down’s syndrome. It leads to bilious vomiting and proximal stomach distension soon after birth, and a double bubble sign on X-ray. It is caused by failure of recanalization of small bowel in early fetal life. Treatment involves surgery.
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This question is part of the following fields:
- Paediatrics
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Question 4
Incorrect
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A 42-year-old man is in the Intensive Care Unit. He has an arterial blood gas that demonstrates pH 7.50, PaCO2 7.2 kPa, PaO2 10.2 kPa and HCO3â 36 mmol/l.
Which of the following is most likely to adjust the patientâs blood pH to normal range?Your Answer: Increase the tidal volume
Correct Answer: Decrease the tidal volume
Explanation:Adjusting Ventilation to Treat Metabolic Alkalosis
To treat a patient with metabolic alkalosis, the arterial blood gas must be adjusted to a normal pH range. One way to achieve this is by increasing the patient’s PaCO2, which can be done by reducing the tidal volume during ventilation. This decreases the amount of CO2 expelled during breathing.
Increasing the respiratory rate or tidal volume would have the opposite effect, reducing CO2 and further increasing blood pH. Administering intravenous bicarbonate is also not recommended as blood bicarbonate levels are already elevated.
Increasing the patient’s minute ventilation would also lower PaCO2, so it is important to carefully adjust ventilation to achieve the desired effect. By understanding the relationship between ventilation and blood pH, healthcare professionals can effectively treat metabolic alkalosis.
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This question is part of the following fields:
- Clinical Biochemistry
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Question 5
Correct
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A 65-year-old woman has been diagnosed with non-small-cell bronchial carcinoma during a bronchoscopy. Despite her diagnosis, she is in good health. CT imaging for staging did not show any signs of metastatic disease. Her surgeon has suggested a pneumonectomy but wants to conduct a PET scan. How will this test aid in managing the patient?
Your Answer: Demonstrates any metastatic disease not found at CT
Explanation:PET Imaging in Cancer Diagnosis and Treatment
PET imaging is a diagnostic tool that uses radiolabelled molecules to identify areas of high metabolic activity, such as cancerous tumors. When combined with CT, PET can be more sensitive in detecting metastatic disease. However, PET has limitations in identifying blood supply and primary tumor masses, which may require other imaging techniques such as angiography or MRI. PET also cannot label tumors for easier identification during surgery, but newer techniques using fluorescent labeling are emerging. Finally, PET does not have any therapeutic effect on the tumor itself, but can be used to guide neoadjuvant therapy.
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This question is part of the following fields:
- Oncology
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Question 6
Incorrect
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A 5-year-old girl with confirmed coeliac disease needs a 1-month prescription for gluten-free staple foods.
What would be the most suitable prescription for gluten-free staple foods?Your Answer: 2 kg bread + 1500 g pasta + 2 kg oats = 20 units
Correct Answer: 1 kg bread + 750 g pasta + 1 kg oats = 10 units
Explanation:Determining the Correct Gluten Prescription for a Patient
When prescribing gluten for a patient, it is important to follow the National Prescribing Guidelines to ensure the correct amount is given. For example, a combination of 1 kg bread, 750 g pasta, and 1 kg oats would result in 10 units of gluten, which is the recommended amount for a 3-year-old patient. However, it is important to note that regional restrictions may apply, such as in England where only bread/flour mixes can be prescribed.
Other combinations, such as 2 kg bread, 1500 g pasta, and 2 kg oats, would result in double the recommended amount of gluten for a 3-year-old patient. It is also important to consider the patient’s age range, as the recommended amount of gluten varies for different age groups.
In summary, determining the correct gluten prescription for a patient involves following the National Prescribing Guidelines, considering regional restrictions, and taking into account the patient’s age range.
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This question is part of the following fields:
- Gastroenterology
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Question 7
Correct
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A 65-year-old woman, whose children called for an ambulance due to concerns about her breathing, has an arterial blood gas (ABG) test done. She is a frequent visitor to the Accident and Emergency department and has been experiencing a cough and producing green sputum for the past 6 days. She is currently receiving long-term oxygen therapy (LTOT) at home. While on controlled oxygen therapy through a Venturi system, her ABG results are as follows:
Investigation Result Normal value
pH 7.232 7.35â7.45
CO2 8.9 kPa 3.5â4.5 kPa
O2 9.4 kPa 8.0â10.0 kPa
HCO3â 33 mmol/l 22.0â28.0 mmol/l
SaO2 89%
Lactate 2.1 0.1â2.2
Which of the following statements best describes this ABG?Your Answer: Respiratory acidosis with partial metabolic compensation
Explanation:Interpreting ABGs: Examples of Acid-Base Imbalances
Acid-base imbalances can be identified through arterial blood gas (ABG) analysis. Here are some examples of ABGs and their corresponding acid-base imbalances:
Respiratory acidosis with partial metabolic compensation
This ABG indicates a patient with long-term chronic obstructive pulmonary disease (COPD) who has chronic carbon dioxide (CO2) retention and partial metabolic compensation (elevated bicarbonate (HCO3)). However, during an infective exacerbation of COPD, the patient’s hypoxia and hypercapnia worsened, resulting in a more severe acidaemia. The metabolic compensation is therefore only partial.Respiratory acidosis with complete metabolic compensation
This ABG shows respiratory acidosis with a low pH due to CO2 retention. Despite some metabolic compensation, this is an acute-on-chronic change that has led to a worsening of the acidaemia.Metabolic acidosis with partial respiratory compensation
In this ABG, a patient with chronic COPD who has presented with an infective exacerbation shows respiratory acidosis with partial metabolic compensation.Metabolic alkalosis with respiratory compensation
This ABG indicates acidaemia due to a chronic respiratory disease.Respiratory acidosis without compensation
Although this ABG shows respiratory acidosis, there is an element of metabolic compensation, as evidenced by the rise in HCO3. -
This question is part of the following fields:
- Acute Medicine And Intensive Care
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Question 8
Incorrect
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A dishevelled-looking 70-year-old woman is admitted from a nursing home following a fall. Her son indicates that she has become increasingly forgetful over the last 2 months. She has had diarrhoea for the last 3 weeks, thought to be related to an outbreak of norovirus at her nursing home, and has been vomiting occasionally. On examination you notice a scaly red rash on her neck and hands.
What is the most likely diagnosis?Your Answer: Post-infective lactose intolerance
Correct Answer: Pellagra
Explanation:Comparison of Different Medical Conditions
Pellagra: A Serious Condition Caused by Niacin Deficiency
Pellagra is a severe medical condition that can lead to death if left untreated. It is characterized by three classical features, including diarrhoea, dermatitis, and dementia. The condition is caused by a deficiency of niacin, which is required for all cellular processes in the body. Pellagra can also develop due to a deficiency of tryptophan, which can be converted to niacin. Treatment for pellagra involves vitamin replacement with nicotinamide.
Scurvy: Bleeding Gums and Muscle Pains
Scurvy is a medical condition that can cause red dots on the skin, but it typically presents with bleeding gums and muscle pains. The condition is caused by a deficiency of vitamin C, which is required for the synthesis of collagen in the body. Treatment for scurvy involves vitamin C replacement.
Post-Infective Lactose Intolerance: Bloating and Abdominal Discomfort
Post-infective lactose intolerance is a medical condition that typically presents after gastrointestinal infections. It can cause bloating, belching, and abdominal discomfort, as well as loose stool. However, the history of skin changes and forgetfulness would point more towards pellagra.
Depression: Not Related to Skin Changes or Diarrhoea/Vomiting
Depression is a medical condition that can cause a range of symptoms, including low mood, loss of interest, and fatigue. However, it is not related to skin changes or diarrhoea/vomiting.
Systemic Lupus Erythematosus (SLE): Painful Swollen Joints and Red ‘Butterfly’ Rash
SLE is a medical condition that typically presents with painful swollen joints and a red ‘butterfly’ rash over the face. Other common symptoms include fever, mouth ulcers, and fatigue.
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This question is part of the following fields:
- Gastroenterology
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Question 9
Incorrect
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A 10-week-old girl is brought to the emergency department with concerns about her breathing. Three days ago, the girl started with a runny nose and mild fever. She seemed to be getting better for a day, but now she is coughing frequently, struggling to breathe, and refusing to eat.
During the examination, there is evidence of nasal flaring. On chest auscultation, there are bilateral crackles and an expiratory wheeze. Her temperature is 38.1ÂșC (normal: 36.1-38.0ÂșC), oxygen saturations are 97% on air (normal: >96%), the heart rate is 128 beats per minute (normal: 115-160), and she has a respiratory rate of 50 breaths per minute (normal: 25-45).
What is the most appropriate treatment for the likely diagnosis?Your Answer: Dexamethasone
Correct Answer: Supportive measures only
Explanation:Bronchiolitis in children can be managed with supportive therapy and does not require antibiotics. The patient in this case presents with typical symptoms of bronchiolitis, including a preceding coryzal phase, cough, increased work of breathing, and crackles and wheeze on auscultation. Although the patient has a mild temperature and tachypnoea, sepsis is not suspected as the normal parameters for children of this age are different. According to NICE guidelines, treatment for bronchiolitis should focus on supportive therapy, such as humidified oxygen or fluids if necessary. Salbutamol, amoxicillin, oral dexamethasone, and erythromycin are not recommended for bronchiolitis.
Bronchiolitis is a condition where the bronchioles become inflamed, and it is most commonly caused by respiratory syncytial virus (RSV). This virus is responsible for 75-80% of cases, with other causes including mycoplasma and adenoviruses. Bronchiolitis is most prevalent in infants under one year old, with 90% of cases occurring in those aged 1-9 months. The condition is more serious in premature babies, those with congenital heart disease or cystic fibrosis. Symptoms include coryzal symptoms, dry cough, increasing breathlessness, and wheezing. Hospital admission is often necessary due to feeding difficulties associated with increasing dyspnoea.
Immediate referral is recommended if the child has apnoea, looks seriously unwell, has severe respiratory distress, central cyanosis, or persistent oxygen saturation of less than 92% when breathing air. Clinicians should consider referral if the child has a respiratory rate of over 60 breaths/minute, difficulty with breastfeeding or inadequate oral fluid intake, or clinical dehydration. Immunofluorescence of nasopharyngeal secretions may show RSV, and management is largely supportive. Humidified oxygen is given via a head box if oxygen saturations are persistently low, and nasogastric feeding may be necessary if children cannot take enough fluid/feed by mouth. Suction may also be used for excessive upper airway secretions. NICE released guidelines on bronchiolitis in 2015 for more information.
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This question is part of the following fields:
- Paediatrics
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Question 10
Correct
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A 28-year-old accountant presents to the Emergency department with a sudden and severe headache that started six hours ago. She also reports feeling nauseous and has vomited three times. Upon examination, she has neck stiffness and photophobia, but her GCS is 15 and she has no fever. What is the most probable diagnosis?
Your Answer: Subarachnoid haemorrhage
Explanation:Diagnosing Severe Headaches: Subarachnoid Hemorrhage and Differential Diagnosis
The sudden onset of a severe headache is a strong indication of subarachnoid hemorrhage, which can be confirmed through a head CT scan. If the scan is normal, a lumbar puncture should be performed to check for red blood cells and xanthochromia. Bacterial meningitis is also a possible diagnosis, but it typically presents with other symptoms of sepsis such as fever. Migraines, on the other hand, are usually preceded by an aura and visual disturbances, and are often associated with prior history and risk factors. Sinusitis and cluster headaches are not suggested by the patient’s history.
Overall, it is important to consider a range of potential diagnoses when evaluating severe headaches, as prompt and accurate diagnosis is crucial for effective treatment.
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This question is part of the following fields:
- Emergency Medicine
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Question 11
Correct
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A 65-year-old homeless man who also abuses alcohol but has been abstinent for 3 years is seeking advice from relief medical staff at a homeless shelter regarding his sore gums. He has noticed coiled body hairs with small bruises at their points of insertion. Additionally, he has observed that when he cuts himself or experiences trauma, the wounds take longer to heal than expected. What is the most probable issue?
Your Answer: Vitamin C deficiency
Explanation:Scurvy: A Clinical Syndrome Caused by Vitamin C Deficiency
Scurvy is a clinical syndrome that results from a lack of vitamin C in the body. This condition is primarily caused by impaired collagen synthesis, which leads to disordered connective tissue. The symptoms of scurvy can occur as early as three months after a deficient intake of vitamin C and include ecchymoses, bleeding gums, petechiae, and impaired wound healing.
Scurvy is most commonly found in severely malnourished individuals, drug and alcohol abusers, or those living in poverty. It is important to note that vitamin C is essential for the body’s overall health and well-being. Therefore, it is crucial to maintain a balanced and nutritious diet to prevent the onset of scurvy and other related health conditions.
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This question is part of the following fields:
- Clinical Sciences
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Question 12
Incorrect
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A 45-year-old male with type 2 diabetes is struggling to manage his high blood pressure despite being on medication. His current treatment includes atenolol, amlodipine, and ramipril, but his blood pressure consistently reads above 170/100 mmHg. During examination, grade II hypertensive retinopathy is observed. His test results show sodium levels at 144 mmol/L (137-144), potassium at 3.1 mmol/L (3.5-4.9), urea at 5.5 mmol/L (2.5-7.5), creatinine at 100 mol/L (60-110), glucose at 7.9 mmol/L (3.0-6.0), and HbA1c at 53 mmol/mol (20-46) or 7% (3.8-6.4). An ECG reveals left ventricular hypertrophy. What possible diagnosis should be considered as the cause of his resistant hypertension?
Your Answer: Renal artery stenosis
Correct Answer: Connâs syndrome (primary hyperaldosteronism)
Explanation:Primary Hyperaldosteronism and Resistant Hypertension
This patient is experiencing resistant hypertension despite being on an angiotensin-converting enzyme inhibitor (ACEi), which should typically increase their potassium concentration. Additionally, their potassium levels are low, which is a strong indication of primary hyperaldosteronism.
Primary hyperaldosteronism can be caused by either an adrenal adenoma (known as Conn syndrome) or bilateral adrenal hyperplasia. To diagnose this condition, doctors typically look for an elevated aldosterone:renin ratio, which is usually above 1000. This condition can be difficult to manage, but identifying it early can help prevent further complications.
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This question is part of the following fields:
- Endocrinology
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Question 13
Correct
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The mother of a 3-year-old boy contacts you for advice on febrile convulsions. Her son had his first seizure a few days ago while suffering from a viral respiratory infection. She describes it as a typical, simple febrile convulsion lasting 2-3 minutes with full recovery in about 30 minutes. The mother recalls being informed that there is a risk of recurrence, but she was not given any treatment and was discharged home. She wants to know when she should call an ambulance if it happens again.
Your Answer: A further simple febrile convulsion lasting > 5 minutes
Explanation:Parents should be informed that if their child experiences a febrile convulsion lasting more than 5 minutes, they should call for an ambulance. While some children may have recurrent febrile convulsions, simple ones typically last up to 15 minutes and result in complete recovery within an hour. In these cases, parents can manage their child at home with clear guidance on when to seek medical help, including the use of buccal midazolam or rectal diazepam. However, if a febrile convulsion lasts longer than 5 minutes, an ambulance should be called. If there is a subsequent convulsion lasting less than 5 minutes with a recovery time of 30-60 minutes, the child may be able to stay at home. However, if a febrile convulsion lasts longer than 10 or 15 minutes, an ambulance should have already been called after the initial 5 minutes.
Febrile convulsions are seizures caused by fever in children aged 6 months to 5 years. They typically last less than 5 minutes and are most commonly tonic-clonic. There are three types: simple, complex, and febrile status epilepticus. Children who have had a first seizure or any features of a complex seizure should be admitted to pediatrics. Regular antipyretics do not reduce the chance of a febrile seizure occurring. The overall risk of further febrile convulsion is 1 in 3, with risk factors including age of onset, fever duration, family history, and link to epilepsy. Children without risk factors have a 2.5% risk of developing epilepsy, while those with all three features have a much higher risk.
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This question is part of the following fields:
- Paediatrics
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Question 14
Incorrect
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A 30-year-old male is brought to the emergency department by his friends as they are concerned that he is talking and behaving oddly.
When asked about the health of his parents he responded that Yesterday I went to visit my father. He was on the roof cleaning the gutters. This seems like a dangerous activity, as there is a high risk of falling and causing an injury. Still, we are all at risk of injuries a lot of the time, for example when driving our cars. We could also cause injuries to ourselves simply by tripping and falling. I think you are at greater risk of falling if your house is poorly lit, you have trip hazards such as loose cables and if your reflexes or depth perception are impaired, for example, when you are intoxicated. When I saw my father yesterday he seemed well and he has no current medical conditions.
What is the best term to describe the abnormality of speech that the patient is demonstrating?Your Answer: Neologism
Correct Answer: Circumstantiality
Explanation:– Circumstantiality: vague speech that wanders off topic before returning to answer the question
– Clanging: using words that sound similar instead of their meaning
– Echolalia: repeating what the examiner says
– Neologism: creating new words
– Perseveration: repeating a word or activity too much -
This question is part of the following fields:
- Psychiatry
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Question 15
Incorrect
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An infant born with trisomy 21 begins to vomit shortly after his first feed. The emesis is green and occurs after each subsequent feeding. His abdomen is also distended, most noticeably in the epigastrum. A baby-gram demonstrates a âdouble bubbleâ in the abdomen.
What is the most likely diagnosis?Your Answer:
Correct Answer: Duodenal atresia
Explanation:Neonatal Bilious Vomiting: Differential Diagnosis
Neonates with bilious vomiting present a diagnostic challenge, as there are several potential causes. In the case of a neonate with trisomy 21, the following conditions should be considered:
1. Duodenal atresia: This condition is characterized by narrowing of the duodenum, leading to bilious vomiting after feeding. Abdominal X-rays show a double bubble sign, indicating normal gastric bubble and duodenal dilation proximal to the obstruction.
2. Biliary atresia: This condition involves a blind-ended biliary tree and can cause indigestion, impaired fat absorption, and jaundice due to bile retention.
3. Pyloric stenosis: This condition is characterized by thickening of the gastric smooth muscle at the pylorus, leading to forceful, non-bilious vomiting within the first month of life. An olive-shaped mass may be felt on abdominal examination.
4. Tracheoesophageal fistula: This condition involves a communication between the trachea and esophagus, leading to pulmonary infection due to aspiration and abdominal distension due to air entering the stomach.
5. Imperforate anus: This condition is suggested when the neonate does not pass meconium within the first few days of life.
A thorough evaluation, including imaging studies and surgical consultation, is necessary to determine the underlying cause of neonatal bilious vomiting.
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This question is part of the following fields:
- Paediatrics
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Question 16
Incorrect
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Various cardiac diseases necessitate the use of pacemakers to maintain regular heartbeats and sustain the patient's life. The following are three types of pacemakers, labeled 1-3: AAI, VVI, and DDD. Can you correctly match each pacemaker to the condition it is typically used to treat?
Your Answer:
Correct Answer: AAI â sinus node dysfunction; VVI â AF; DDD â second-degree heart block
Explanation:Understanding Pacemaker Coding and Indications
Pacemakers are electronic devices that are implanted in the chest to regulate the heartbeat. They are used to treat a variety of heart conditions, including sinus node dysfunction, atrial fibrillation (AF), and heart block. Pacemakers are coded based on the chambers they pace, sense, and respond to, as well as their ability to modulate heart rate and provide multisite pacing.
AAI pacemakers are used to pace the atria in patients with sinus node dysfunction and intact AV conduction. VVI pacemakers are used in patients with chronic atrial impairment, such as AF. DDD pacemakers are used to pace both the atria and ventricles in patients with second-degree heart block.
It is important to note that AAI pacemakers would not be effective in treating ventricular systolic dysfunction, and DDD pacemakers cannot be used in the treatment of long QT syndrome. However, pacemakers can be used in long QT syndrome if clinically necessary, and DDD pacing may be appropriate for some patients with first-degree heart block.
In summary, understanding pacemaker coding and indications is crucial for selecting the appropriate device for each patient’s unique heart condition.
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This question is part of the following fields:
- Cardiology
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Question 17
Incorrect
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A 50-year-old man visits his doctor with symptoms of a vasculitic rash, joint pains, and swollen ankles. He reports feeling unwell, fatigued, and experiencing weight loss. During the visit, his urine dipstick shows blood and protein, and urgent blood tests reveal worsening kidney function with elevated inflammatory markers. The doctor suspects microscopic polyangiitis and requests an autoimmune screening. What autoantibody is expected to be positive in this case?
Your Answer:
Correct Answer: p-ANCA with MPO specificity
Explanation:ANCA and its association with small vessel vasculitides
Antineutrophil cytoplasmic antibodies (ANCA) are a characteristic feature of small vessel vasculitides such as microscopic polyangiitis (MPA) and granulomatosis with polyangiitis (GPA). These antibodies can also be seen in eosinophilic granulomatosis with polyangiitis (eGPA), previously known as Churg-Strauss syndrome. ANCA has two staining patterns, cytoplasmic (c-ANCA) and perinuclear (p-ANCA), which are detected through immunofluorescence. These antibodies are directed against proteins within the cytoplasmic granules of neutrophils. In most cases, c-ANCA has specificity for proteinase 3 (PR3) and p-ANCA has specificity for myeloperoxidase (MPO).
In patients with GPA, ANCA positivity is observed in approximately 90% of cases, with 80-90% being c-ANCA positive with PR3 specificity. In contrast, in patients with MPA, approximately 60% are p-ANCA positive with MPO specificity, and around 35% have c-ANCA.
The history of the patient in question is more consistent with MPA, and therefore, the most likely test to be positive is p-ANCA with MPO specificity. ANA is usually associated with systemic lupus erythematosus, which could present with similar symptoms, but the patient’s age and sex are more in line with ANCA vasculitis.
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This question is part of the following fields:
- Nephrology
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Question 18
Incorrect
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A 35-year-old woman, para 2+0, is currently in the second stage of labour and has successfully delivered the anterior shoulder. She has chosen active management for the third stage of labour. During her pregnancy, she experienced mild gestational hypertension and her most recent blood pressure reading was 140/90 mmHg. What medication should be given at this point?
Your Answer:
Correct Answer: Oxytocin
Explanation:The third stage of labor begins with the birth of the baby and ends with the expulsion of the placenta and membranes. To reduce the risk of post-partum hemorrhage and the need for blood transfusion after delivery, active management of this stage is recommended. This involves administering uterotonic drugs, delaying clamping and cutting of the cord for over a minute but less than five minutes, and using controlled cord traction after signs of placental separation. Guidelines recommend the use of 10 IU oxytocin by IM injection after delivery of the anterior shoulder. Ergometrine should not be given to patients with hypertension, and oxytocin is preferred as it causes less nausea and vomiting. The active management process should take less than 30 minutes.
Understanding Labour and its Stages
Labour is the process of giving birth, which is characterized by the onset of regular and painful contractions that are associated with cervical dilation and descent of the presenting part. Signs of labour include regular and painful uterine contractions, a show (shedding of mucous plug), rupture of the membranes (not always), and shortening and dilation of the cervix.
Labour can be divided into three stages. The first stage starts from the onset of true labour to when the cervix is fully dilated. The second stage is from full dilation to delivery of the fetus, while the third stage is from delivery of the fetus to when the placenta and membranes have been completely delivered.
Monitoring is an essential aspect of labour. Fetal heart rate (FHR) should be monitored every 15 minutes (or continuously via CTG), contractions should be assessed every 30 minutes, maternal pulse rate should be assessed every 60 minutes, and maternal blood pressure and temperature should be checked every 4 hours. Vaginal examination (VE) should be offered every 4 hours to check the progression of labour, and maternal urine should be checked for ketones and protein every 4 hours.
In summary, understanding the stages of labour and the importance of monitoring can help ensure a safe and successful delivery.
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This question is part of the following fields:
- Obstetrics
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Question 19
Incorrect
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A 50-year-old woman reports experiencing painful tingling in her fingers and relief when hanging her arm over the side of the bed. She also has a positive Tinel's sign. What is the most probable factor contributing to her diagnosis?
Your Answer:
Correct Answer: Rheumatoid arthritis
Explanation:The patient has been diagnosed with carpal tunnel syndrome, which is often caused by rheumatological disorders. During the clinical examination, it is important to look for signs of rheumatoid arthritis, such as rheumatoid nodules, vasculitic lesions, and arthritis in the metacarpophalangeal joints.
Understanding Carpal Tunnel Syndrome
Carpal tunnel syndrome is a condition that occurs when the median nerve in the carpal tunnel is compressed. Patients with this condition typically experience pain or pins and needles in their thumb, index, and middle fingers. In some cases, the symptoms may even ascend proximally. Patients often shake their hand to obtain relief, especially at night.
During an examination, doctors may observe weakness of thumb abduction and wasting of the thenar eminence (not the hypothenar). Tapping on the affected area may cause paraesthesia, which is known as Tinel’s sign. Flexion of the wrist may also cause symptoms, which is known as Phalen’s sign.
Carpal tunnel syndrome can be caused by a variety of factors, including idiopathic reasons, pregnancy, oedema (such as heart failure), lunate fracture, and rheumatoid arthritis. Electrophysiology tests may show prolongation of the action potential in both motor and sensory nerves.
Treatment for carpal tunnel syndrome may include a 6-week trial of conservative treatments, such as corticosteroid injections and wrist splints at night. If symptoms persist or are severe, surgical decompression (flexor retinaculum division) may be necessary.
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This question is part of the following fields:
- Musculoskeletal
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Question 20
Incorrect
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Which of the following combinations of age and percentage of hearing loss is incorrect for the overall population?
Your Answer:
Correct Answer: Aged 80-89: approximately 50% affected
Explanation:Age and Hearing Loss
As people age, the likelihood of experiencing hearing loss increases. In fact, the percentage of the population with a significant hearing loss rises with each passing decade. For those in the 80-89-year-old age group, it is estimated that between 70-80% of them will have a degree of hearing loss greater than 25 dB. This means that the majority of individuals in this age range will have difficulty hearing and may require hearing aids or other assistive devices to communicate effectively. It is important for individuals of all ages to take steps to protect their hearing, such as avoiding loud noises and wearing ear protection when necessary, in order to minimize the risk of hearing loss as they age.
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This question is part of the following fields:
- Neurology
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Question 21
Incorrect
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Electroconvulsive Therapy (ECT) is recommended by NICE for which clinical conditions?
Your Answer:
Correct Answer: In a catatonic patient
Explanation:Electroconvulsive therapy (ECT) should only be considered as a treatment option for individuals with severe major depressive disorder that is potentially life-threatening, and where other treatments have been ineffective. It is also recommended for those experiencing catatonia or a prolonged/severe manic episode.
Electroconvulsive therapy (ECT) is a viable treatment option for patients who suffer from severe depression that does not respond to medication, such as catatonia, or those who experience psychotic symptoms. The only absolute contraindication for ECT is when a patient has raised intracranial pressure.
Short-term side effects of ECT include headaches, nausea, short-term memory impairment, memory loss of events prior to the therapy, and cardiac arrhythmia. However, these side effects are typically temporary and resolve quickly.
Long-term side effects of ECT are less common, but some patients have reported impaired memory. It is important to note that the benefits of ECT often outweigh the potential risks, and it can be a life-changing treatment for those who have not found relief from other forms of therapy.
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This question is part of the following fields:
- Psychiatry
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Question 22
Incorrect
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A 30-year-old man comes to you complaining of severe anal pain that has been bothering him for a day, especially during defecation. Upon further inquiry, he reveals that he has been experiencing constipation more frequently lately and had a minor incident of fresh red blood on the toilet paper a week ago. During the examination, you observe a tender, bulging nodule just outside the anal opening. What is the probable diagnosis?
Your Answer:
Correct Answer: Thrombosed haemorrhoid
Explanation:Thrombosed haemorrhoids are characterized by severe pain and the presence of a tender lump. Upon examination, a purplish, swollen, and tender subcutaneous perianal mass can be observed. If the patient seeks medical attention within 72 hours of onset, referral for excision may be necessary. However, if the condition has progressed beyond this timeframe, patients can typically manage their symptoms with stool softeners, ice packs, and pain relief medication. Symptoms usually subside within 10 days.
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This question is part of the following fields:
- Surgery
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Question 23
Incorrect
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A 40-year-old woman was admitted to the psychiatric ward with paranoid delusions, auditory hallucinations and violent behaviour. There was no past medical history. She was diagnosed with schizophrenia and given intramuscular haloperidol regularly. Four days later, she became febrile and confused. The haloperidol was stopped, but 2 days later, she developed marked rigidity, sweating and drowsiness. She had a variable blood pressure and pulse rate. Creatine phosphokinase was markedly raised.
What is the most likely diagnosis?Your Answer:
Correct Answer: Neuroleptic malignant syndrome
Explanation:Understanding Neuroleptic Malignant Syndrome: A Potentially Life-Threatening Reaction to Neuroleptic Medication
Neuroleptic malignant syndrome (NMS) is a rare but serious reaction to neuroleptic medication. It is characterized by hyperpyrexia (high fever), autonomic dysfunction, rigidity, altered consciousness, and elevated creatine phosphokinase levels. Treatment involves stopping the neuroleptic medication and cooling the patient. Medications such as bromocriptine, dantrolene, and benzodiazepines may also be used.
It is important to note that other conditions, such as cerebral abscess, meningitis, and phaeochromocytoma, do not typically present with the same symptoms as NMS. Serotonin syndrome, while similar, usually presents with different symptoms such as disseminated intravascular coagulation, renal failure, tachycardia, hypertension, and tachypnea.
If you or someone you know is taking neuroleptic medication and experiences symptoms of NMS, seek medical attention immediately. Early recognition and treatment can be life-saving.
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This question is part of the following fields:
- Psychiatry
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Question 24
Incorrect
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A 33-year-old female who cannot tolerate methotrexate is initiated on azathioprine for her rheumatoid arthritis. During routine blood monitoring, the following results are obtained:
- Hemoglobin (Hb): 7.9 g/dl
- Platelets (Plt): 97 * 109/l
- White blood cells (WBC): 2.7 * 109/l
What are the factors that can increase the risk of azathioprine toxicity in this patient?Your Answer:
Correct Answer: Thiopurine methyltransferase deficiency
Explanation:Before starting treatment with azathioprine, it is important to check for the presence of thiopurine methyltransferase (TPMT) deficiency, which occurs in approximately 1 in 200 individuals. This deficiency increases the risk of developing pancytopenia related to azathioprine.
Azathioprine is a medication that is broken down into mercaptopurine, which is an active compound that inhibits the production of purine. To determine if someone is at risk for azathioprine toxicity, a test for thiopurine methyltransferase (TPMT) may be necessary. Adverse effects of this medication include bone marrow depression, which can be detected through a full blood count if there are signs of infection or bleeding, as well as nausea, vomiting, pancreatitis, and an increased risk of non-melanoma skin cancer. It is important to note that there is a significant interaction between azathioprine and allopurinol, so lower doses of azathioprine should be used in conjunction with allopurinol. Despite these potential side effects, azathioprine is generally considered safe to use during pregnancy.
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This question is part of the following fields:
- Musculoskeletal
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Question 25
Incorrect
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A 35-year-old man with a history of chronic alcohol abuse presents to the Emergency Department. He appears disheveled, disoriented, and experiences frequent falls. Upon examination, you observe that he has difficulty with balance and coordination, and bilateral lateral rectus palsy with nystagmus. His sensory examination reveals a polyneuropathy, and his pulse is 90 bpm. There is no agitation or tremor noted on examination.
What is the most urgent treatment that should be administered to this patient?Your Answer:
Correct Answer: Pabrinex
Explanation:Understanding Wernicke’s Encephalopathy
Wernicke’s encephalopathy is a condition that affects the brain and is caused by a deficiency in thiamine. This condition is commonly seen in individuals who abuse alcohol, but it can also be caused by persistent vomiting, stomach cancer, or dietary deficiencies. The classic triad of symptoms associated with Wernicke’s encephalopathy includes oculomotor dysfunction, gait ataxia, and encephalopathy. Other symptoms may include peripheral sensory neuropathy and confusion.
When left untreated, Wernicke’s encephalopathy can lead to the development of Korsakoff’s syndrome. This condition is characterized by antero- and retrograde amnesia and confabulation in addition to the symptoms associated with Wernicke’s encephalopathy.
To diagnose Wernicke’s encephalopathy, doctors may perform a variety of tests, including a decreased red cell transketolase test and an MRI. Treatment for this condition involves urgent replacement of thiamine. With prompt treatment, individuals with Wernicke’s encephalopathy can recover fully.
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This question is part of the following fields:
- Medicine
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Question 26
Incorrect
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Are there any immunosuppressant drugs that can cause severe myelosuppression along with unpleasant gastrointestinal side effects? It is important to note that while all immunosuppressants have potential side effects such as increased risk of infection and malignancy, certain drugs may have specific side effects due to their unique mechanisms of action.
Your Answer:
Correct Answer: Mycophenolate mofetil
Explanation:Myelosuppression and Gastrointestinal Side Effects of Immunosuppressive Drugs
Immunosuppressive drugs are commonly used in the treatment of autoimmune diseases and organ transplantation. However, they can cause myelosuppression, a condition where the bone marrow is suppressed and the production of blood cells is reduced. Mycophenolate mofetil (MMF) is known to cause myelosuppression even at low doses, so it is important to monitor patients’ full blood count (FBC) after starting treatment with MMF or azathioprine. Azathioprine is also associated with myelosuppression, but it is more commonly linked to abnormal liver function tests (LFTs) than gastrointestinal (GI) upset.
Patients taking MMF often experience diarrhea, which can be managed by starting with a low dose and gradually increasing it over several weeks. It is crucial to monitor patients for myelosuppression and other side effects of immunosuppressive drugs to ensure their safety and well-being. By doing so, healthcare providers can adjust the dosage or switch to a different medication if necessary. Proper monitoring and management of side effects can help patients achieve better outcomes and improve their quality of life.
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This question is part of the following fields:
- Nephrology
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Question 27
Incorrect
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A 27-year-old semi-professional rugby player presents with a red, hot, swollen left knee. There has been no history of trauma. He recently had a negative sexual health check and has not had any new partners since. Upon examination, the left knee is unable to fully extend and there is a large effusion. The clinical suspicion is septic arthritis. What is the most probable organism responsible for this condition?
Your Answer:
Correct Answer: Staphylococcus aureus
Explanation:Septic Arthritis: Causes and Treatment
Septic arthritis is a rheumatological emergency that requires urgent attention. A red, hot, swollen joint may indicate septic arthritis, which can be caused by a variety of pathogens. The most common pathogen is Staphylococcus aureus, and joint destruction can occur within 24 hours if left untreated. It is important to consider and treat septic arthritis urgently or until firmly excluded by joint aspiration. The empirical antibiotic regime should be consulted in local health authority guidelines or with a microbiologist. Intravenous drugs should be used for 2 weeks and a total course of 6 weeks completed. Other pathogens that can cause septic arthritis include Neisseria gonorrhoeae, Mycobacterium tuberculosis, Streptococcus viridans, and Salmonella typhi. It is important to consider the patient’s medical history and risk factors when determining the cause of septic arthritis.
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This question is part of the following fields:
- Rheumatology
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Question 28
Incorrect
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An 80-year-old man presents to the surgical assessment unit with vomiting and abdominal distension. He has been experiencing absolute constipation for the past three days and his abdomen has become increasingly distended. He also reports feeling nauseous and has been vomiting for the last day. The patient has a medical history of hypertension and takes ramipril.
Upon examination, the patient has a soft but significantly distended abdomen that is tympanic to percussion. Loud bowel sounds are audible. His vital signs are as follows: heart rate of 87 bpm, blood pressure of 135/87 mmHg, and temperature of 36.8ÂșC. An abdominal x-ray reveals a 'coffee-bean' sign, indicating a sigmoid volvulus.
What is the initial management approach for this condition?Your Answer:
Correct Answer: Decompression via rigid sigmoidoscopy and flatus tube insertion
Explanation:Flatus tube insertion is the primary management approach for unruptured sigmoid volvulus.
In elderly patients, sigmoid volvulus is a common condition that can be initially treated without surgery by decompressing the bowel using a flatus tube. This approach is preferred as surgery poses a higher risk in this age group. Flatus tube decompression typically leads to resolution of the volvulus without recurrence. If flatus tube decompression fails or recurrence occurs despite multiple attempts, the next step is to insert a percutaneous colostomy tube to decompress the volvulus.
Conservative management is not appropriate for patients with absolute constipation as the volvulus can become ischemic and perforate, which is associated with a high mortality rate. Anti-muscarinic agents are used to treat pseudo-obstruction, not volvulus. There is no evidence to support the need for a Hartmann’s procedure as perforation is not a concern.
Understanding Volvulus: A Condition of Twisted Colon
Volvulus is a medical condition that occurs when the colon twists around its mesenteric axis, leading to a blockage in blood flow and closed loop obstruction. Sigmoid volvulus is the most common type, accounting for around 80% of cases, and is caused by the sigmoid colon twisting on the sigmoid mesocolon. Caecal volvulus, on the other hand, occurs in around 20% of cases and is caused by the caecum twisting. This condition is more common in patients with developmental failure of peritoneal fixation of the proximal bowel.
Sigmoid volvulus is often associated with chronic constipation, Chagas disease, neurological conditions like Parkinson’s disease and Duchenne muscular dystrophy, and psychiatric conditions like schizophrenia. Caecal volvulus, on the other hand, is associated with adhesions, pregnancy, and other factors. Symptoms of volvulus include constipation, abdominal bloating, abdominal pain, and nausea/vomiting.
Diagnosis of volvulus is usually done through an abdominal film, which shows signs of large bowel obstruction alongside the coffee bean sign for sigmoid volvulus. Small bowel obstruction may be seen in caecal volvulus. Management of sigmoid volvulus involves rigid sigmoidoscopy with rectal tube insertion, while caecal volvulus usually requires operative management, with right hemicolectomy often being necessary.
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This question is part of the following fields:
- Surgery
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Question 29
Incorrect
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A 30-year-old male presents with massive haematemesis and is diagnosed with splenomegaly. What is the probable origin of the bleeding?
Your Answer:
Correct Answer: Oesophageal varices
Explanation:Portal Hypertension and its Manifestations
Portal hypertension is a condition that often leads to splenomegaly and upper gastrointestinal (GI) bleeding. The primary cause of bleeding is oesophageal varices, which are dilated veins in the oesophagus. In addition to these symptoms, portal hypertension can also cause ascites, a buildup of fluid in the abdomen, and acute or chronic hepatic encephalopathy, a neurological disorder that affects the brain. Another common manifestation of portal hypertension is splenomegaly with hypersplenism, which occurs when the spleen becomes enlarged and overactive, leading to a decrease in the number of blood cells in circulation. the various symptoms of portal hypertension is crucial for early diagnosis and effective management of the 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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A 16-year-old girl comes to her healthcare provider and reveals that she has missed two periods and has taken a pregnancy test that confirms she is pregnant. She has been sexually active with her 17-year-old boyfriend for the past six months, using condoms as protection. The patient expresses her desire for an abortion but does not want to involve her parents in any way. Despite being counseled on the procedure and advised to involve her parents, she refuses and threatens to seek an abortion elsewhere. She fully understands the risks associated with the procedure. What is the most appropriate course of action for this patient?
Your Answer:
Correct Answer: Offer her a referral to an abortion service without parental consent
Explanation:Gillick Competency and Abortion: the Guidelines
Under the Gillick case, a child who is deemed competent and has a full of the implications of her actions can be offered advice and treatment without parental consent. This means that if a patient requests an abortion, it can be offered with appropriate counselling and support.
However, if a healthcare practitioner has conscientious objections to participating in an abortion, they must provide an alternative practitioner who will support the patient. It is important to note that every effort should be made to persuade the patient to inform her parents.
Overall, the Gillick competency and Fraser guidelines provide a framework for healthcare practitioners to navigate the complex issue of abortion in cases involving minors. It is crucial to prioritize the patient’s autonomy and well-being while also respecting the practitioner’s beliefs and values.
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This question is part of the following fields:
- Miscellaneous
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