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Question 1
Correct
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A 30-year-old man is diagnosed with a psychiatric disorder during the 3rd-trimester of his partner's pregnancy and is prescribed medication. As a result of this treatment, the newborn is born with weak muscle tone, difficulties with feeding, hypothyroidism, and an enlarged thyroid gland.
Which of the following medications is the most probable cause of these abnormalities?Your Answer: Lithium
Explanation:Lithium is a medication used to stabilize mood and is approved for the treatment and prevention of mania, bipolar disorder, recurrent depression, and aggressive or self-harming behavior. During pregnancy and the postnatal period, it is important to monitor lithium levels more frequently. If taken during the first trimester, lithium is associated with an increased risk of fetal cardiac malformations, such as Ebstein’s anomaly. If taken during the second and third trimesters, there is a risk of various complications in the newborn, including hypotonia, lethargy, feeding problems, hypothyroidism, goiter, and nephrogenic diabetes insipidus.
Here is a list outlining commonly encountered drugs that have adverse effects during pregnancy:
Drug: ACE inhibitors (e.g. ramipril)
Adverse effects: If taken during the second and third trimesters, ACE inhibitors can cause hypoperfusion, renal failure, and the oligohydramnios sequence.Drug: Aminoglycosides (e.g. gentamicin)
Adverse effects: Aminoglycosides can cause ototoxicity and deafness in the fetus.Drug: Aspirin
Adverse effects: High doses of aspirin can lead to first-trimester abortions, delayed onset labor, premature closure of the fetal ductus arteriosus, and fetal kernicterus. However, low doses (e.g. 75 mg) do not pose a significant risk.Drug: Benzodiazepines (e.g. diazepam)
Adverse effects: When taken late in pregnancy, benzodiazepines can cause respiratory depression and a neonatal withdrawal syndrome.Drug: Calcium-channel blockers
Adverse effects: If taken during the first trimester, calcium-channel blockers can cause phalangeal abnormalities. If taken during the second and third trimesters, they can lead to fetal growth retardation. -
This question is part of the following fields:
- Pharmacology & Poisoning
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Question 2
Incorrect
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A 25-year-old engineering student returns from a hiking trip in South America with a high temperature, body aches, and shivering. After further examination, they are diagnosed with Plasmodium falciparum malaria.
Which of the following statements about Plasmodium falciparum malaria is correct?Your Answer: It is transmitted by the female Aedes mosquito
Correct Answer: There may be a continuous fever
Explanation:Plasmodium falciparum malaria is transmitted by female mosquitoes of the Anopheles genus. The Aedes genus, on the other hand, is responsible for spreading diseases like dengue fever and yellow fever. The parasite enters hepatocytes and undergoes asexual reproduction, resulting in the release of merozoites into the bloodstream. These merozoites then invade the red blood cells of the host. The incubation period for Plasmodium falciparum malaria ranges from 7 to 14 days.
The main symptom of malaria is known as the malarial paroxysm, which consists of a cyclical pattern of cold chills, followed by a stage of intense heat, and finally a period of profuse sweating as the fever subsides. However, some individuals may experience a continuous fever instead.
Currently, the recommended treatment for P. falciparum malaria is artemisinin-based combination therapy (ACT). This involves combining fast-acting artemisinin-based compounds with drugs from a different class. Companion drugs used in ACT include lumefantrine, mefloquine, amodiaquine, sulfadoxine/pyrimethamine, piperaquine, and chlorproguanil/dapsone. Artemisinin derivatives such as dihydroartemisinin, artesunate, and artemether are also used.
If artemisinin combination therapy is not available, oral quinine or atovaquone with proguanil hydrochloride can be used as an alternative. However, quinine is not well-tolerated for prolonged treatment and should be combined with another drug, typically oral doxycycline (or clindamycin for pregnant women and young children).
Severe or complicated cases of falciparum malaria require specialized care in a high dependency unit or intensive care setting. Intravenous artesunate is recommended for all patients with severe or complicated falciparum malaria, as well as those at high risk of developing severe disease (e.g., if more than 2% of red blood cells are parasitized) or if the patient is unable to take oral treatment. After a minimum of 24 hours of intravenous artesunate treatment and improvement in the patient’s condition, a full course of artemisinin combination therapy should be administered orally.
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This question is part of the following fields:
- Infectious Diseases
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Question 3
Correct
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A 40-year-old woman presents with a painful, swollen right ankle following a recent hike in the mountains. You assess her for a possible sprained ankle, and as part of your assessment, you measure her ankle circumference.
What is the THRESHOLD level suggested by NICE as indicating a higher likelihood of a sprained ankle?Your Answer: More than 3 cm between the extremities
Explanation:The NICE guidelines for suspected deep vein thrombosis (DVT) suggest considering the possibility of DVT if typical symptoms and signs are present, particularly if the person has risk factors like previous venous thromboembolism and immobility.
Typical signs and symptoms of DVT include unilateral localized pain (often throbbing) that occurs during walking or bearing weight, as well as calf swelling (or, less commonly, swelling of the entire leg). Other signs to look out for are tenderness, skin changes such as edema, redness, and warmth, and vein distension.
To rule out other potential causes for the symptoms and signs, it is important to conduct a physical examination and review the person’s general medical history.
When assessing leg and thigh swelling, it is recommended to measure the circumference of the leg 10 cm below the tibial tuberosity and compare it with the unaffected leg. A difference of more than 3 cm between the two legs increases the likelihood of DVT.
Additionally, it is important to check for edema and dilated collateral superficial veins on the affected side.
To assess the likelihood of DVT and guide further management, the two-level DVT Wells score can be used.
For more information, you can refer to the NICE Clinical Knowledge Summary on deep vein thrombosis.
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This question is part of the following fields:
- Vascular
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Question 4
Correct
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A 35-year-old woman with a history of sickle cell disease undergoes a blood transfusion. After one week, she experiences a slight fever and notices dark urine. Blood tests are ordered, revealing elevated bilirubin and LDH levels, as well as a positive Direct Antiglobulin Test (DAT).
Which of the following transfusion reactions is the most probable cause of these symptoms?Your Answer: Delayed haemolytic reaction
Explanation:Blood transfusion is a crucial treatment that can save lives, but it also comes with various risks and potential problems. These include immunological complications, administration errors, infections, and immune dilution. While there have been improvements in safety procedures and a reduction in transfusion use, errors and adverse reactions still occur.
Delayed haemolytic transfusion reactions (DHTRs) typically occur 4-8 days after a blood transfusion, but can sometimes manifest up to a month later. The symptoms are similar to acute haemolytic transfusion reactions but are usually less severe. Patients may experience fever, inadequate rise in haemoglobin, jaundice, reticulocytosis, positive antibody screen, and positive Direct Antiglobulin Test (Coombs test). DHTRs are more common in patients with sickle cell disease who have received frequent transfusions.
These reactions are caused by the presence of a low titre antibody that is too weak to be detected during cross-match and unable to cause lysis at the time of transfusion. The severity of DHTRs depends on the immunogenicity or dose of the antigen. Blood group antibodies associated with DHTRs include those of the Kidd, Duffy, Kell, and MNS systems. Most DHTRs have a benign course and do not require treatment. However, severe haemolysis with anaemia and renal failure can occur, so monitoring of haemoglobin levels and renal function is necessary. If an antibody is detected, antigen-negative blood can be requested for future transfusions.
Here is a summary of the main transfusion reactions and complications:
1. Febrile transfusion reaction: Presents with a 1-degree rise in temperature from baseline, along with chills and malaise. It is the most common reaction and is usually caused by cytokines from leukocytes in transfused red cell or platelet components. Supportive treatment with paracetamol is helpful.
2. Acute haemolytic reaction: Symptoms include fever, chills, pain at the transfusion site, nausea, vomiting, and dark urine. It is the most serious type of reaction and often occurs due to ABO incompatibility from administration errors. The transfusion should be stopped, and IV fluids should be administered. Diuretics may be required.
3. Delayed haemolytic reaction: This reaction typically occurs 4-8 days after a blood transfusion and presents with fever, anaemia, jaundice and haemoglobuinuria. Direct antiglobulin (Coombs) test positive. Due to low titre antibody too weak to detect in cross-match and unable to cause lysis at time of transfusion. Most delayed haemolytic reactions have a benign course and require no treatment. Monitor anaemia and renal function and treat as required.
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This question is part of the following fields:
- Haematology
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Question 5
Correct
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A 5 year old male is brought to the emergency department as his parents are worried about his intermittent headache and fever for 2 days and the recent appearance of a rash. Upon examining the rash (shown below), you diagnose the patient with chickenpox. What is the best course of action for managing this patient?
Your Answer: Discharge with self care advice
Explanation:Chickenpox in children is usually managed conservatively. In this case, the patient has chickenpox but does not show any signs of serious illness. The parents should be given advice on keeping the child out of school, ensuring they stay hydrated, and providing relief for their symptoms. It is important to provide appropriate safety measures in case the child’s condition worsens. Admission to the hospital is not recommended for uncomplicated chickenpox as it could spread the infection to other children, especially those who may have a weakened immune system. Aciclovir should not be used for uncomplicated chickenpox in children. VZIG is given as a preventive measure for infection, mainly for pregnant women without immunity, and is not a treatment for those already infected. There is no need to check both parents’ IgG levels unless the mother is pregnant and has no history of chickenpox or shingles, in which case testing may be appropriate.
Further Reading:
Chickenpox is caused by the varicella zoster virus (VZV) and is highly infectious. It is spread through droplets in the air, primarily through respiratory routes. It can also be caught from someone with shingles. The infectivity period lasts from 4 days before the rash appears until 5 days after the rash first appeared. The incubation period is typically 10-21 days.
Clinical features of chickenpox include mild symptoms that are self-limiting. However, older children and adults may experience more severe symptoms. The infection usually starts with a fever and is followed by an itchy rash that begins on the head and trunk before spreading. The rash starts as macular, then becomes papular, and finally vesicular. Systemic upset is usually mild.
Management of chickenpox is typically supportive. Measures such as keeping cool and trimming nails can help alleviate symptoms. Calamine lotion can be used to soothe the rash. People with chickenpox should avoid contact with others for at least 5 days from the onset of the rash until all blisters have crusted over. Immunocompromised patients and newborns with peripartum exposure should receive varicella zoster immunoglobulin (VZIG). If chickenpox develops, IV aciclovir should be considered. Aciclovir may be prescribed for immunocompetent, non-pregnant adults or adolescents with severe chickenpox or those at increased risk of complications. However, it is not recommended for otherwise healthy children with uncomplicated chickenpox.
Complications of chickenpox can include secondary bacterial infection of the lesions, pneumonia, encephalitis, disseminated haemorrhagic chickenpox, and rare conditions such as arthritis, nephritis, and pancreatitis.
Shingles is the reactivation of the varicella zoster virus that remains dormant in the nervous system after primary infection with chickenpox. It typically presents with signs of nerve irritation before the eruption of a rash within the dermatomal distribution of the affected nerve. Patients may feel unwell with malaise, myalgia, headache, and fever prior to the rash appearing. The rash appears as erythema with small vesicles that may keep forming for up to 7 days. It usually takes 2-3 weeks for the rash to resolve.
Management of shingles involves keeping the vesicles covered and dry to prevent secondary bacterial infection.
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This question is part of the following fields:
- Paediatric Emergencies
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Question 6
Incorrect
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A 70-year-old diabetic smoker presents with central chest pain that radiates to his left shoulder and jaw. He is given 300 mg aspirin and morphine, and his pain subsides. The pain lasted approximately 90 minutes in total. His ECG shows normal sinus rhythm. He is referred to the on-call medical team for admission, and a troponin test is scheduled at the appropriate time. His blood tests today reveal a creatinine level of 298 micromoles per litre.
Which of the following medications should you also consider administering to this patient?Your Answer: Fondaparinux
Correct Answer: Unfractionated heparin
Explanation:This patient’s medical history suggests a diagnosis of acute coronary syndrome. It is important to provide pain relief as soon as possible. This can be achieved by administering GTN (sublingual or buccal), but if there is suspicion of an acute myocardial infarction (MI), intravenous opioids such as morphine should be offered.
Aspirin should be given to all patients with unstable angina or NSTEMI as soon as possible and should be continued indefinitely, unless there are contraindications such as a high risk of bleeding or aspirin hypersensitivity. A single loading dose of 300 mg should be given immediately after presentation.
For patients without a high risk of bleeding and no planned coronary angiography within 24 hours of admission, fondaparinux should be administered. However, if coronary angiography is planned within 24 hours, unfractionated heparin can be offered as an alternative to fondaparinux. For patients with significant renal impairment (creatinine above 265 micromoles per litre), unfractionated heparin should be considered, with dose adjustment based on clotting function monitoring.
Routine administration of oxygen is no longer recommended, but oxygen saturation should be monitored using pulse oximetry as soon as possible, preferably before hospital admission. Supplemental oxygen should only be given to individuals with an oxygen saturation (SpO2) below 94% who are not at risk of hypercapnic respiratory failure, aiming for an SpO2 of 94-98%. For individuals with chronic obstructive pulmonary disease at risk of hypercapnic respiratory failure, a target SpO2 of 88-92% should be achieved until blood gas analysis is available.
Bivalirudin, a specific and reversible direct thrombin inhibitor (DTI), is recommended by NICE as a potential treatment for adults with STEMI undergoing percutaneous coronary intervention.
For more information, refer to the NICE guidelines on the assessment and diagnosis of chest pain of recent onset.
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This question is part of the following fields:
- Cardiology
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Question 7
Correct
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A patient currently undergoing treatment for a malignant condition comes in with a recent weight increase, puffiness in the face, high blood pressure, and acne. Blood tests show high sodium levels, low potassium levels, and metabolic alkalosis.
Which of the following is the most probable location of this tumor?Your Answer: Lung
Explanation:Small cell lung cancer (SCLC) that originates from neuroendocrine tissue can lead to the development of paraneoplastic endocrine syndromes, such as Cushing syndrome. This occurs due to the inappropriate secretion of ectopic adrenocorticotropic hormone (ACTH). In this case, it is highly likely that the patient has a neuroendocrine tumor within the lung that is secreting ACTH.
The signs and symptoms of Cushing syndrome may be minimal in cases of ectopic ACTH-secreting tumors, and the onset of symptoms may be sudden, especially in rapidly growing SCLCs. The typical biochemical profile observed in these cases includes elevated sodium levels, low potassium levels, and a metabolic alkalosis.
The tumors associated with the production of ectopic ACTH are as follows:
– Small cell lung cancer (SCLC) – 50%
– Bronchial carcinoid tumors – 10%
– Thymic carcinoma – 10%
– Pancreatic islet cell tumors – 5%
– Phaeochromocytoma – 5%
– Medullary thyroid carcinoma – 5% -
This question is part of the following fields:
- Oncological Emergencies
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Question 8
Correct
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A 45-year-old woman presents with increasing shortness of breath at rest and severe left shoulder pain. The pain travels down the inner side of her left arm and into her ring and little finger. She has a long history of smoking, having smoked 30 packs of cigarettes per year. During the examination, her voice sounds hoarse and there is muscle wasting in her left hand and forearm. Additionally, she has a left-sided ptosis and miosis.
What is the MOST suitable initial test to perform?Your Answer: Chest X-ray
Explanation:This individual, who has been smoking for a long time, is likely to have squamous cell carcinoma of the lung located at the right apex. This particular type of cancer is causing Pancoast’s syndrome. Pancoast’s syndrome typically presents with rib erosion, leading to severe shoulder pain, as well as Horner’s syndrome due to the infiltration of the lower part of the brachial plexus. Additionally, there may be hoarseness of the voice and a ‘bovine cough’ due to a concurrent recurrent laryngeal nerve palsy.
The classic description of Horner’s syndrome includes the following clinical features on the same side as the tumor: miosis (constricted pupil), ptosis (drooping eyelid), anhidrosis (lack of sweating), and enophthalmos (sunken appearance of the eye). A chest X-ray would be able to detect the presence of the apical tumor and confirm the diagnosis.
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This question is part of the following fields:
- Respiratory
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Question 9
Correct
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A 25-year-old woman with a history of schizophrenia is brought to the Emergency Department. She is exhibiting signs of acute psychosis.
Which ONE of the following is acknowledged as a negative symptom of schizophrenia?Your Answer: Blunted affect
Explanation:The first-rank symptoms of schizophrenia, as described by Kurt Schneider, include auditory hallucinations such as hearing 3rd person voices discussing the patient, experiencing thought echo, and receiving commentary on one’s actions. Additionally, passivity phenomena may occur, such as thought insertion, thought withdrawal, thought broadcast, and feelings of thoughts and actions being under external control. Delusions, which can be primary or secondary, are also common in schizophrenia.
On the other hand, chronic schizophrenia is characterized by negative symptoms. These include poor motivation and self-care, social withdrawal, depression, flat and blunted affect, emotional incongruity, decreased activity, and poverty of thought and speech. These symptoms are often present in individuals with chronic schizophrenia.
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This question is part of the following fields:
- Mental Health
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Question 10
Correct
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You are participating in training for managing a significant radiation incident. Which of the following decontamination measures is expected to be the most efficient in eliminating radioactive material from an affected individual?
Your Answer: Remove outer layer of clothing
Explanation:The first step in decontaminating radioactive material from an individual is to remove their clothing carefully, without shaking it too much to avoid spreading radioactive dust. The clothing should then be placed in a plastic bag or sealable container. Next, the person should be washed down with warm water from a clean source and scrubbed with detergent using a rinse-wipe-rinse method.
Further Reading:
Radiation exposure refers to the emission or transmission of energy in the form of waves or particles through space or a material medium. There are two types of radiation: ionizing and non-ionizing. Non-ionizing radiation, such as radio waves and visible light, has enough energy to move atoms within a molecule but not enough to remove electrons from atoms. Ionizing radiation, on the other hand, has enough energy to ionize atoms or molecules by detaching electrons from them.
There are different types of ionizing radiation, including alpha particles, beta particles, gamma rays, and X-rays. Alpha particles are positively charged and consist of 2 protons and 2 neutrons from the atom’s nucleus. They are emitted from the decay of heavy radioactive elements and do not travel far from the source atom. Beta particles are small, fast-moving particles with a negative electrical charge that are emitted from an atom’s nucleus during radioactive decay. They are more penetrating than alpha particles but less damaging to living tissue. Gamma rays and X-rays are weightless packets of energy called photons. Gamma rays are often emitted along with alpha or beta particles during radioactive decay and can easily penetrate barriers. X-rays, on the other hand, are generally lower in energy and less penetrating than gamma rays.
Exposure to ionizing radiation can damage tissue cells by dislodging orbital electrons, leading to the generation of highly reactive ion pairs. This can result in DNA damage and an increased risk of future malignant change. The extent of cell damage depends on factors such as the type of radiation, time duration of exposure, distance from the source, and extent of shielding.
The absorbed dose of radiation is directly proportional to time, so it is important to minimize the amount of time spent in the vicinity of a radioactive source. A lethal dose of radiation without medical management is 4.5 sieverts (Sv) to kill 50% of the population at 60 days. With medical management, the lethal dose is 5-6 Sv. The immediate effects of ionizing radiation can range from radiation burns to radiation sickness, which is divided into three main syndromes: hematopoietic, gastrointestinal, and neurovascular. Long-term effects can include hematopoietic cancers and solid tumor formation.
In terms of management, support is mainly supportive and includes IV fluids, antiemetics, analgesia, nutritional support, antibiotics, blood component substitution, and reduction of brain edema.
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This question is part of the following fields:
- Environmental Emergencies
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Question 11
Incorrect
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A 2-year-old girl is brought in by her father. She is experiencing pain in her left ear and has symptoms of a cold. Upon examination, her left eardrum appears red. She does not have a fever and is otherwise healthy. You diagnose her with acute otitis media.
What would be a valid reason to prescribe antibiotics for this child?Your Answer: Hearing loss
Correct Answer: Age less than 2 years
Explanation:According to a Cochrane review conducted in 2008, it was discovered that approximately 80% of children experiencing acute otitis media were able to recover within a span of two days. However, the use of antibiotics only resulted in a reduction of pain for about 7% of children after the same two-day period. Furthermore, the administration of antibiotics did not show any significant impact on the rates of hearing loss, recurrence, or perforation. In cases where antibiotics are deemed necessary for children with otitis media, some indications include being under the age of two, experiencing discharge from the ear (otorrhoea), and having bilateral acute otitis media.
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This question is part of the following fields:
- Ear, Nose & Throat
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Question 12
Incorrect
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A 42-year-old man presents with a high temperature, difficulty breathing, diarrhea and vomiting, fatigue, and fainting. He has recently returned from a wellness retreat in France. The patient is referred to the medical team on duty and admitted to the hospital. They suspect a potential diagnosis of Legionnaires' disease.
What is the definitive test used to confirm a case of Legionnaires' disease?Your Answer: Confirmation of Legionella pneumophila urinary antigen
Correct Answer: Isolation and culture from a sputum sample
Explanation:The guidelines from the British Thoracic Society (BTS) recommend conducting investigations for Legionella infection in the following cases: severe community-acquired pneumonia, patients with specific risk factors, and during outbreaks of community-acquired pneumonia. To confirm a case, the Public Health England (PHE) requires one of the following: isolation and culture of Legionella species from clinical specimens (typically sputum), seroconversion with a four-fold increase in titre of indirect immunofluorescent antibody test (IFAT) using a validated technique, or confirmation of Legionella pneumophila urinary antigen using validated reagents or kits. The gold standard for confirmation is the isolation and culture of Legionella species, while cases of Pontiac fever are usually culture-negative. The HPA considers a case presumptive if there is a clinical diagnosis of pneumonia with a single high titre of 128 using IFAT, or a single titre of 64 in an outbreak. A positive result by direct immunofluorescence on a clinical specimen using validated monoclonal antibodies is also considered a presumptive case.
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This question is part of the following fields:
- Respiratory
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Question 13
Incorrect
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A 60-year-old woman comes in with intense pain and vision loss in her left eye. She has experienced multiple episodes of vomiting. Upon examination, there is noticeable redness around the left side of the cornea, and the left pupil is dilated and unresponsive to light.
What is the most suitable initial treatment for this patient?Your Answer: Topical pilocarpine
Correct Answer: Intravenous acetazolamide
Explanation:This patient has presented with acute closed-angle glaucoma, which is a serious eye condition requiring immediate medical attention. It occurs when the iris pushes forward and blocks the fluid access to the trabecular meshwork, leading to increased pressure within the eye and damage to the optic nerve.
The main symptoms of acute closed-angle glaucoma include severe eye pain, decreased vision, redness around the cornea, swelling of the cornea, a fixed semi-dilated pupil, nausea, vomiting, and episodes of blurred vision or seeing haloes.
To confirm the diagnosis, tonometry is performed to measure the intraocular pressure. Normal pressure ranges from 10 to 21 mmHg, but in acute closed-angle glaucoma, it is often higher than 30 mmHg. Goldmann’s applanation tonometer is commonly used in hospitals for this purpose.
Management of acute closed-angle glaucoma involves providing pain relief, such as morphine, and antiemetics if the patient is experiencing vomiting. Intravenous acetazolamide is administered to reduce intraocular pressure. Additionally, a topical miotic medication like pilocarpine is started about an hour after initiating other treatments to help constrict the pupil, as it may initially be paralyzed and unresponsive.
Overall, acute closed-angle glaucoma is a medical emergency that requires prompt intervention to alleviate symptoms and prevent further damage to the eye.
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This question is part of the following fields:
- Ophthalmology
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Question 14
Correct
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A 35-year-old dairy farmer presents with a flu-like illness that has been worsening for the past two weeks. He has high fevers, a pounding headache, and muscle aches. He has now also developed a dry cough, stomach pain, and diarrhea. During the examination, there are no notable chest signs, but a liver edge can be felt 4 cm below the costal margin.
Today, his blood tests show the following results:
- Hemoglobin (Hb): 13.4 g/dl (normal range: 13-17 g/dl)
- White blood cell count (WCC): 21.5 x 109/l (normal range: 4-11 x 109/l)
- Neutrophils: 17.2 x 109/l (normal range: 2.5-7.5 x 109/l)
- Platelets: 567 x 109/l (normal range: 150-400 x 109/l)
- C-reactive protein (CRP): 187 mg/l (normal range: < 5 mg/l)
- Sodium (Na): 127 mmol/l (normal range: 133-147 mmol/l)
- Potassium (K): 4.4 mmol/l (normal range: 3.5-5.0 mmol/l)
- Creatinine (Creat): 122 micromol/l (normal range: 60-120 micromol/l)
- Urea: 7.8 mmol/l (normal range: 2.5-7.5 mmol/l)
- Aspartate aminotransferase (AST): 121 IU/l (normal range: 8-40 IU/l)
- Alkaline phosphatase (ALP): 296 IU/l (normal range: 30-200 IU/l)
- Bilirubin: 14 micromol/l (normal range: 3-17 micromol/l)
What is the SINGLE most likely causative organism?Your Answer: Coxiella burnetii
Explanation:Q fever is a highly contagious infection caused by Coxiella burnetii, which can be transmitted from animals to humans. It is commonly observed as an occupational disease among individuals working in farming, slaughterhouses, and animal research. Approximately 50% of cases do not show any symptoms, while those who are affected often experience flu-like symptoms such as headache, fever, muscle pain, diarrhea, nausea, and vomiting.
In some cases, patients may develop an atypical pneumonia characterized by a dry cough and minimal chest signs. Q fever can also lead to hepatitis and enlargement of the liver (hepatomegaly), although jaundice is not commonly observed. Typical blood test results for Q fever include an elevated white cell count (30-40%), ALT/AST levels that are usually 2-3 times higher than normal, increased ALP levels (70%), reduced sodium levels (30%), and reactive thrombocytosis.
It is important to check patients for heart murmurs and signs of valve disease, as these conditions increase the risk of developing infective endocarditis. Treatment for Q fever typically involves a two-week course of doxycycline.
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This question is part of the following fields:
- Respiratory
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Question 15
Correct
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A 45-year-old man presents with a history of feeling generally unwell and having experienced fevers at home. He has a history of lung cancer for which he is currently receiving radiation therapy. His observations are as follows: HR 92 bpm, BP 130/80, SaO2 98% on air, temperature 38.9°C. A diagnosis of neutropenic sepsis is suspected.
According to the current NICE guidelines what is the cut off point for the neutrophil count for a diagnosis of neutropenic sepsis to be made?Your Answer: 0.5 x 109 per litre or lower
Explanation:Neutropenic sepsis is a serious complication that can arise when a person has low levels of neutrophils, which are a type of white blood cell. This condition can be life-threatening and is commonly seen in individuals undergoing treatments such as cytotoxic chemotherapy or taking immunosuppressive drugs. Other causes of neutropenia include infections, bone marrow disorders like aplastic anemia and myelodysplastic syndromes, as well as nutritional deficiencies.
To diagnose neutropenic sepsis, doctors look for specific criteria in patients receiving anticancer treatment. These criteria include having a neutrophil count of 0.5 x 109 per liter or lower, along with either a body temperature higher than 38°C or other signs and symptoms that indicate a clinically significant sepsis.
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This question is part of the following fields:
- Oncological Emergencies
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Question 16
Incorrect
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You evaluate the airway and breathing of a child who has been brought into the emergency room by an ambulance after being rescued from a house fire. You suspect that the child may have signs of airway obstruction.
Which of the following statements about managing the airway and breathing in burned patients is correct?Your Answer: An endotracheal tube of at least size 6.5 mm internal diameter should be used for intubation in adults
Correct Answer:
Explanation:Patients who have suffered burns should receive high-flow oxygen (15 L) through a reservoir bag while their breathing is being evaluated. If intubation is necessary, it is crucial to use an appropriately sized endotracheal tube (ETT). Using a tube that is too small can make it difficult or even impossible to ventilate the patient, clear secretions, or perform bronchoscopy.
According to the ATLS guidelines, adults should be intubated using an ETT with an internal diameter (ID) of at least 7.5 mm or larger. Children, on the other hand, should have an ETT with an ID of at least 4.5 mm. Once a patient has been intubated, it is important to continue administering 100% oxygen until their carboxyhemoglobin levels drop to less than 5%.
To protect the lungs, it is recommended to use lung protective ventilation techniques. This involves using low tidal volumes (4-8 mL/kg) and ensuring that peak inspiratory pressures do not exceed 30 cmH2O.
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This question is part of the following fields:
- Trauma
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Question 17
Correct
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A 60-year-old woman comes in sweating and in distress, complaining of abdominal discomfort and feeling nauseous. She has a history of excessive alcohol consumption and has just completed a weekend of heavy drinking. During the examination, there is significant tenderness in her abdomen, particularly in the upper middle area, and bruising is noticeable around her belly button and on the sides of her abdomen.
What is the SINGLE most probable diagnosis?Your Answer: Acute pancreatitis
Explanation:Acute pancreatitis is a common and serious cause of acute abdominal pain. It occurs when the pancreas becomes inflamed, leading to the release of enzymes that cause self-digestion of the organ.
The most common causes of acute pancreatitis are gallstones and alcohol consumption. Many cases are also of unknown origin. To remember the various causes, the mnemonic ‘I GET SMASHED’ can be helpful:
– I: Idiopathic
– G: Gallstones
– E: Ethanol
– T: Trauma
– S: Steroids
– M: Mumps
– A: Autoimmune
– S: Scorpion stings
– H: Hyperlipidemia/hypercalcemia
– E: ERCP
– D: DrugsThe clinical features of acute pancreatitis include severe epigastric pain, nausea and vomiting, referral of pain to specific dermatomes (or shoulder tip via the phrenic nerve), fever/sepsis, epigastric tenderness, jaundice, and signs such as Gray-Turner sign (ecchymosis of the flank) and Cullen sign (ecchymosis of the peri-umbilical area).
The stimulation of the thoracic splanchnic nerves is responsible for the referred pain to the T6-10 dermatomes that is sometimes observed in pancreatitis and other pancreatic disorders.
When investigating acute pancreatitis in the emergency department, it is important to perform blood glucose testing, a full blood count (which often shows an elevated white cell count), urea and electrolyte testing, calcium testing, liver function tests, coagulation screening, serum amylase testing (which should be more than 5 times the normal limit), an ECG, arterial blood gas analysis, and an abdominal X-ray.
Treatment for acute pancreatitis involves providing the patient with oxygen, adequate pain relief (including antiemetics), and fluid resuscitation. A nasogastric tube and urinary catheter should be inserted, and fluid balance should be carefully monitored. Most patients require management in a high dependency unit (HDU) or intensive care unit (ICU) setting.
Acute pancreatitis has a significant mortality rate, and complications are common. Early complications may include severe sepsis and circulatory shock, acute renal failure, disseminated intravascular coagulation, hypocalcemia, acute respiratory distress syndrome and pancreatic encephalopathy.
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This question is part of the following fields:
- Surgical Emergencies
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Question 18
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A 67-year-old woman experiences a stroke. Her primary symptoms include weakness in her right limbs, particularly affecting her face and arm more than her leg, as well as sensory loss on the right side. Additionally, she has receptive dysphasia.
Which blood vessel is most likely to be impacted?Your Answer: Middle cerebral artery
Explanation:The symptoms and signs of strokes can vary depending on which blood vessel is affected. Here is a summary of the main symptoms based on the territory affected:
Anterior cerebral artery: This can cause weakness on the opposite side of the body, with the leg and shoulder being more affected than the arm, hand, and face. There may also be minimal loss of sensation on the opposite side of the body. Other symptoms can include difficulty speaking (dysarthria), language problems (aphasia), apraxia (difficulty with limb movements), urinary incontinence, and changes in behavior and personality.
Middle cerebral artery: This can lead to weakness on the opposite side of the body, with the face and arm being more affected than the leg. There may also be a loss of sensation on the opposite side of the body. Depending on the dominant hemisphere of the brain, there may be difficulties with expressive or receptive language (dysphasia). In the non-dominant hemisphere, there may be neglect of the opposite side of the body.
Posterior cerebral artery: This can cause a loss of vision on the opposite side of both eyes (homonymous hemianopia). There may also be defects in a specific quadrant of the visual field. In some cases, there may be a syndrome affecting the thalamus on the opposite side of the body.
It’s important to note that these are just general summaries and individual cases may vary. If you suspect a stroke, it’s crucial to seek immediate medical attention.
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This question is part of the following fields:
- Neurology
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Question 19
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A 28-year-old woman comes in with lower abdominal pain, painful sex, and a thick, yellowish vaginal discharge. A pregnancy test done today is negative and her last period was four weeks ago. Her temperature today is 38.6°C.
What is the MOST suitable initial test to perform?Your Answer: Endocervical swab
Explanation:Pelvic inflammatory disease (PID) is an infection that affects the upper female reproductive tract, including the uterus, fallopian tubes, and ovaries. It is typically caused by an ascending infection from the cervix. The most common culprits are sexually transmitted diseases like chlamydia and gonorrhea, with chlamydia being the most prevalent infection seen in UK genitourinary medicine clinics.
PID can often be asymptomatic, but when symptoms do occur, they may include lower abdominal pain and tenderness, fever, painful urination, painful intercourse, purulent vaginal discharge, abnormal vaginal bleeding, and tenderness in the cervix and adnexa. It’s important to note that symptoms of ectopic pregnancy can be mistaken for PID, so a pregnancy test should always be conducted in patients with suspicious symptoms.
To investigate a potential case of PID, endocervical swabs are taken to test for chlamydia and gonorrhea using nucleic acid amplification tests. It is recommended to start empirical antibiotic treatment as soon as a presumptive diagnosis of PID is made, without waiting for swab results.
Mild to moderate cases of PID can usually be managed in primary care or outpatient settings. However, patients with severe disease should be admitted to the hospital for intravenous antibiotics. Signs of severe disease include a fever above 38°C, signs of a tubo-ovarian abscess, signs of pelvic peritonitis, or concurrent pregnancy.
The current recommended treatment for outpatient cases of PID is a single intramuscular dose of ceftriaxone 500 mg, followed by oral doxycycline 100 mg twice daily and oral metronidazole 400 mg twice daily for 14 days. An alternative regimen is oral ofloxacin 400 mg twice daily and oral metronidazole 400 mg twice daily for 14 days.
For severely ill patients in the inpatient setting, initial treatment consists of intravenous doxycycline, a single-dose of intravenous ceftriaxone, and intravenous metronidazole. Afterward, the treatment is switched to oral doxycycline and metronidazole to complete a 14-day course.
If a patient fails to respond to treatment, laparoscopy is necessary to confirm the diagnosis or consider alternative diagnoses.
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This question is part of the following fields:
- Obstetrics & Gynaecology
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Question 20
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A 60-year-old woman presents with a gradual decline in her hearing. She struggles to understand her husband's words at times and describes his voice as muffled. Both of her ears are affected, and her hearing worsens in noisy settings. During the examination, both of her eardrums appear normal, and Rinne's test yields normal results.
What is the MOST LIKELY diagnosis for this patient?Your Answer: Presbycusis
Explanation:Presbycusis is a type of hearing loss that occurs gradually as a person gets older. It affects both ears and is caused by the gradual deterioration of the hair cells in the cochlea and the cochlear nerve. The most noticeable hearing loss is at higher frequencies, and it worsens over time. People with presbycusis often have difficulty hearing speech clearly, and they may describe words as sounding muffled or blending together. A test called Rinne’s test will show normal results in cases of presbycusis. If a patient has presbycusis, it is recommended that they be referred for a hearing aid fitting.
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This question is part of the following fields:
- Ear, Nose & Throat
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