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Question 1
Incorrect
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A 30-year-old nulliparous woman arrives at the emergency department with a positive home pregnancy test and symptoms of diarrhoea and mild abdominal discomfort that have been present for 6 hours. She has not been using any regular contraception and her last menstrual period was 8 weeks ago. The patient has a history of pelvic inflammatory disease. A transvaginal ultrasound shows a 40mm foetal sac at the ampulla of the fallopian tube without a visible heartbeat, and her serum B-HCG level is 1200 IU/L. What is the definitive indication for surgical management in this case?
Your Answer: Serum HCG concentration
Correct Answer: Foetal sac size
Explanation:Surgical management is recommended for all ectopic pregnancies with a foetal sac larger than 35mm or a serum B-hCG level exceeding 5,000 IU/L, as per NICE guidelines. Foetal sacs larger than 35mm are at a higher risk of spontaneous rupture, making expectant or medical management unsuitable. The size of the foetal sac is measured using transvaginal ultrasound. Detection of a foetal heartbeat on transvaginal ultrasound requires urgent surgical management. A history of pelvic inflammatory disease is not an indication for surgical management, although it is a risk factor for ectopic pregnancy. Serum HCG levels between 1,500IU/L and 5,000 IU/L may be managed medically if the patient can return for follow-up and has no significant abdominal pain or haemodynamic instability. A septate uterus is not an indication for surgical management of ectopic pregnancy, but it may increase the risk of miscarriage.
Ectopic pregnancy is a serious condition that requires prompt investigation and management. Women who are stable are typically investigated and managed in an early pregnancy assessment unit, while those who are unstable should be referred to the emergency department. The investigation of choice for ectopic pregnancy is a transvaginal ultrasound, which will confirm the presence of a positive pregnancy test.
There are three ways to manage ectopic pregnancies: expectant management, medical management, and surgical management. The choice of management will depend on various criteria, such as the size of the ectopic pregnancy, whether it is ruptured or not, and the patient’s symptoms and hCG levels. Expectant management involves closely monitoring the patient over 48 hours, while medical management involves giving the patient methotrexate and requires follow-up. Surgical management can involve salpingectomy or salpingostomy, depending on the patient’s risk factors for infertility.
Salpingectomy is the first-line treatment for women without other risk factors for infertility, while salpingostomy should be considered for women with contralateral tube damage. However, around 1 in 5 women who undergo a salpingostomy require further treatment, such as methotrexate and/or a salpingectomy. It is important to carefully consider the patient’s individual circumstances and make a decision that will provide the best possible outcome.
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This question is part of the following fields:
- Gynaecology
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Question 2
Incorrect
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A 2-day-old baby girl is presented to the emergency department by her parents with complaints of decreased oral intake and fussiness. The parents also report that the baby has been vomiting green liquid and has not had a bowel movement since passing meconium, although she has had wet diapers. The baby was born vaginally at 39 weeks without any complications during pregnancy or delivery. An upper gastrointestinal contrast study revealed intestinal malrotation. What is the most appropriate definitive treatment option?
Your Answer: Surgical resection with end ileostomy
Correct Answer: Ladd’s procedure
Explanation:A newborn with symptoms of bowel obstruction and bilious vomiting is suspected to have paediatric intestinal malrotation with volvulus. An upper gastrointestinal contrast study confirms the diagnosis. The most appropriate management option is a Ladd’s procedure, which involves division of Ladd bands and widening of the base of the mesentery. If vascular compromise is present, an urgent laparotomy is required. IV antibiotics are not indicated as there are no signs of infection. NEC may require antibiotics, but it presents differently with feeding intolerance, abdominal distension, and bloody stools, and is more common in premature infants.
Paediatric Gastrointestinal Disorders
Pyloric stenosis is more common in males and has a 5-10% chance of being inherited from parents. Symptoms include projectile vomiting at 4-6 weeks of life, and diagnosis is made through a test feed or ultrasound. Treatment involves a Ramstedt pyloromyotomy, either open or laparoscopic.
Acute appendicitis is uncommon in children under 3 years old, but when it does occur, it may present atypically. Mesenteric adenitis causes central abdominal pain and URTI, and is treated conservatively.
Intussusception occurs in infants aged 6-9 months and causes colicky pain, diarrhea, vomiting, a sausage-shaped mass, and red jelly stool. Treatment involves reduction with air insufflation.
Intestinal malrotation is characterized by a high caecum at the midline and may be complicated by the development of volvulus. Diagnosis is made through an upper GI contrast study and ultrasound, and treatment involves laparotomy or a Ladd’s procedure.
Hirschsprung’s disease occurs in 1/5000 births and is characterized by delayed passage of meconium and abdominal distension. Treatment involves rectal washouts and an anorectal pull through procedure.
Oesophageal atresia is associated with tracheo-oesophageal fistula and polyhydramnios, and may present with choking and cyanotic spells following aspiration. Meconium ileus is usually associated with cystic fibrosis and requires surgery to remove plugs. Biliary atresia causes jaundice and increased conjugated bilirubin, and requires an urgent Kasai procedure. Necrotising enterocolitis is more common in premature infants and is treated with total gut rest and TPN, with laparotomy required for perforations.
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This question is part of the following fields:
- Paediatrics
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Question 3
Incorrect
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A 6-month-old boy is brought to the Urgent Paediatric Clinic with a urinary tract infection (UTI) that was treated in the community. He was born at term and has been healthy throughout infancy, without previous history of UTI. There is no significant family history. The child's development is appropriate for his age and there have been no concerns about his growth. The antibiotics took effect after 4 days and he is currently doing well. Physical examination, including vital signs, is unremarkable. The child's height and weight are both at the 50th percentile. The microbiology results confirm a UTI caused by Enterococcus. What is the most suitable imaging approach that should have been taken/ordered?
Your Answer: Routine USS and DMSA; MCUG not indicated
Correct Answer: Urgent USS during the acute infection with routine DMSA and MCUG
Explanation:Guidelines for Imaging in Atypical UTIs in Children
When a child presents with an atypical urinary tract infection (UTI), imaging is necessary to identify any structural abnormalities in the urinary tract. The National Institute for Health and Care Excellence (NICE) guidelines provide recommendations for imaging based on the age of the child and the severity of the infection.
For children under 6 months of age with an atypical UTI, an urgent ultrasound scan (USS) is required during the acute infection. Once the infection has resolved, a routine dimercaptosuccinic acid (DMSA) scan and a micturating cystourethrogram (MCUG) are performed 4-6 months later.
For children older than 6 months with recurrent UTIs, a routine USS and DMSA scan plus MCUG are recommended. However, for children aged 6 months to 3 years with an atypical UTI, an urgent USS followed by a routine DMSA is sufficient. An MCUG is only performed if there is any dilation identified on USS, poor urine flow, family history of vesico-ureteric reflux, or a non-E. coli infection.
It is important to follow these guidelines to ensure appropriate imaging and management of atypical UTIs in children.
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This question is part of the following fields:
- Paediatrics
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Question 4
Correct
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A 20-year-old man presents with a 3-week history of left groin pain, associated with a lump that seems to come and go.
Following examination, the clinician deduces that the swelling is most likely to be an indirect inguinal hernia.
Indirect inguinal hernias can be controlled at:Your Answer: 1.3 cm above the mid-point of the inguinal ligament
Explanation:Understanding Inguinal Hernias: Key Landmarks and Assessment Techniques
Inguinal hernias are a common condition that can cause discomfort and pain. Understanding the key landmarks and assessment techniques can aid in the diagnosis and management of this condition.
Deep Inguinal Ring: The location of the deep inguinal ring is 1.3 cm above the midpoint of the inguinal ligament. Indirect hernias originate from this area.
Pubic Tubercle: The pubic tubercle is a landmark that distinguishes between inguinal hernias and femoral hernias. Inguinal hernias emerge above and medial to the tubercle, while femoral hernias emerge below and lateral.
Hasselbach’s Triangle: This is the area where direct hernias protrude through the abdominal wall. The triangle consists of the inferior epigastric vessels superiorly and laterally, the rectus abdominis muscle medially, and the inguinal ligament inferiorly.
Inferior Epigastric Vessels: Direct hernias are medial to the inferior epigastric vessels, while indirect hernias arise lateral to these vessels. However, this assessment can only be carried out during surgery when these vessels are visible.
Scrotum: If a lump is present within the scrotum and cannot be palpated above, it is most likely an indirect hernia.
By understanding these key landmarks and assessment techniques, healthcare professionals can accurately diagnose and manage inguinal hernias.
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This question is part of the following fields:
- Colorectal
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Question 5
Correct
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A 32-year-old woman comes in with a positive urine pregnancy test. Lifestyle advice is given and blood tests are ordered. She has no notable medical history. During the examination, the following are observed:
- Heart rate: 92 beats per minute
- Blood pressure: 126/78 mmHg
- Oxygen saturation: 98% on room air
- Temperature: 36.6ºC
- Respiratory rate: 16 breaths per minute
- BMI: 30 kg/m²
What supplementation would you recommend for this patient?Your Answer: Folic acid 5mg daily
Explanation:Pregnant women with a BMI greater than 30 kg/m2, regardless of their medical history, should receive a high dose of 5mg folic acid to prevent neural tube defects. Iron supplementation may be necessary for those with iron-deficiency anemia, but it is not currently indicated for this patient. Low-dose folic acid supplementation may be appropriate for non-obese pregnant women. Vitamin B12 supplementation is necessary for those with a deficiency, but it is not currently indicated for this patient. Vitamin D supplementation may be necessary for those with a deficiency, but it is not currently indicated for this patient unless she has risk factors such as dark skin and modest clothing.
Folic Acid: Importance, Deficiency, and Prevention
Folic acid is a vital nutrient that is converted to tetrahydrofolate (THF) in the body. It is found in green, leafy vegetables and plays a crucial role in the transfer of 1-carbon units to essential substrates involved in the synthesis of DNA and RNA. However, certain factors such as phenytoin, methotrexate, pregnancy, and alcohol excess can cause a deficiency in folic acid. This deficiency can lead to macrocytic, megaloblastic anemia and neural tube defects.
To prevent neural tube defects during pregnancy, it is recommended that all women take 400mcg of folic acid until the 12th week of pregnancy. Women at higher risk of conceiving a child with a neural tube defect should take 5mg of folic acid from before conception until the 12th week of pregnancy. Women are considered higher risk if they or their partner has a neural tube defect, they have had a previous pregnancy affected by a neural tube defect, or they have a family history of a neural tube defect. Additionally, women with certain medical conditions such as coeliac disease, diabetes, or thalassaemia trait, or those taking antiepileptic drugs, or who are obese (BMI of 30 kg/m2 or more) are also considered higher risk.
In summary, folic acid is an essential nutrient that plays a crucial role in DNA and RNA synthesis. Deficiency in folic acid can lead to serious health consequences, including neural tube defects. However, taking folic acid supplements during pregnancy can prevent these defects and ensure a healthy pregnancy.
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This question is part of the following fields:
- Obstetrics
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Question 6
Correct
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A 55-year-old man is brought in following a fall from scaffolding resulting in an open tibial fracture and a 15 cm wound. Fortunately, he has no neurovascular damage. What is the most appropriate initial step to take?
Your Answer: Intravenous antibiotics, photography and application of saline soaked gauze with impermeable dressing
Explanation:When dealing with open fractures, it is important to start with giving the patient intravenous antibiotics, taking photographs of the wound, and applying a sterile soaked gauze and impermeable film. It is crucial to avoid handling the wound except for removing any visible contamination. After this initial step, the patient will likely need further treatment for skeletal and soft tissue reconstruction.
Understanding Open Fractures
Open fractures occur when there is a break in the bone and the skin is also damaged. Any wound in the same limb as a fracture should be considered an open fracture. The main issue with open fractures is the damage to the surrounding soft tissues, including muscles, nerves, blood vessels, and periosteum. The severity of the injury and outcome depend on the extent of this damage. The Gustilo and Anderson system grades open fractures based on the size of the wound and soft tissue damage. Type IIIc injuries, which involve arterial injury, may require primary amputation.
Initial management of open fractures involves examining the patient for associated injuries, controlling bleeding, and assessing the extent of the injury. Imaging and establishing distal neurovascular status are also important. Antibiotics should be administered, and the wound should be covered with a dressing. Early debridement, which involves removing foreign material and devitalized tissue, is crucial. The wound is often left open and irrigated with saline. Stabilizing the fracture is also important, and an external fixator is often used initially.
Overall, understanding open fractures is important for proper management and treatment. Early intervention and careful attention to soft tissue damage can improve outcomes for patients.
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This question is part of the following fields:
- Musculoskeletal
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Question 7
Correct
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A 75-year-old woman has been experiencing a sensation of dragging, which improves when lying down. According to the Pelvic Organ Prolapse Quantification (POPQ), her cervix is prolapsed 0.8 cm below the hymen level during straining. What is her diagnosis?
Your Answer: Stage 2 prolapse
Explanation:Understanding Different Stages of Pelvic Organ Prolapse
Pelvic organ prolapse (POP) is a common condition among women, especially those who have given birth or gone through menopause. It occurs when the pelvic organs, such as the uterus, bladder, or rectum, descend from their normal position and bulge into the vaginal canal. The severity of POP is classified into four stages based on the distance of the prolapse from the hymen.
Stage 1 prolapse is the mildest form, where the cervix descends more than 1 cm above the hymen. Stage 2 prolapse is when the most distal prolapse is between 1 cm above and 1 cm below the level of the hymen. Stage 3 prolapse is when the prolapse extends more than 1 cm below the hymen but not completely outside the vaginal opening. Finally, stage 4 prolapse is the most severe form, where there is complete eversion of the vagina.
Another type of POP is called enterocoele or enterocele, which occurs when the small intestine descends into the lower pelvic cavity and pushes into the upper vaginal wall. This can cause discomfort, pain, and difficulty with bowel movements.
In rare cases, a condition called procidentia can occur, where the uterus and cervix protrude from the introitus, resulting in thickened vaginal mucous and ulceration. This is a severe form of POP that requires immediate medical attention.
It is important for women to be aware of the different stages of POP and seek medical advice if they experience any symptoms, such as pelvic pressure, discomfort, or difficulty with urination or bowel movements. Treatment options may include pelvic floor exercises, pessaries, or surgery, depending on the severity of the prolapse.
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This question is part of the following fields:
- Gynaecology
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Question 8
Correct
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A 68-year-old woman comes to the eye casualty department complaining of a gradual decline in her vision over the past 8 years. She reports difficulty reading books due to this issue. Upon examination, a central visual impairment is observed, and the patient displays metamorphopsia when using an Amsler grid. Fundoscopy reveals small yellow deposits in the macula. What is the most suitable medical treatment for this patient, given the most probable diagnosis?
Your Answer: Vitamin supplementation
Explanation:Medical treatment cannot cure dry AMD. However, administering high doses of beta-carotene, vitamins C and E, and zinc can help slow down the progression of visual impairment.
Age-related macular degeneration (ARMD) is a common cause of blindness in the UK, characterized by the degeneration of the central retina (macula) and the formation of drusen. It is more prevalent in females and is strongly associated with advancing age, smoking, family history, and conditions that increase the risk of ischaemic cardiovascular disease. ARMD can be classified into two forms: dry and wet. Dry ARMD is more common and is characterized by drusen, while wet ARMD is characterized by choroidal neovascularisation and carries a worse prognosis. Clinical features of ARMD include subacute onset of visual loss, difficulties in dark adaptation, and visual disturbances such as photopsia and glare.
To diagnose ARMD, slit-lamp microscopy and color fundus photography are used to identify any pigmentary, exudative, or haemorrhagic changes affecting the retina. Fluorescein angiography and indocyanine green angiography may also be used to visualize changes in the choroidal circulation. Treatment for dry ARMD involves a combination of zinc with antioxidant vitamins A, C, and E, which has been shown to reduce disease progression by around one third. For wet ARMD, anti-VEGF agents such as ranibizumab, bevacizumab, and pegaptanib are used to limit disease progression and stabilize or reverse visual loss. Laser photocoagulation may also be used to slow progression, but anti-VEGF therapies are usually preferred due to the risk of acute visual loss after treatment.
In summary, ARMD is a common cause of blindness in the UK that is strongly associated with advancing age, smoking, and family history. It can be classified into dry and wet forms, with wet ARMD carrying a worse prognosis. Diagnosis involves the use of various imaging techniques, and treatment options include a combination of zinc and antioxidant vitamins for dry ARMD and anti-VEGF agents or laser photocoagulation for wet ARMD.
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This question is part of the following fields:
- Ophthalmology
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Question 9
Correct
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A 15-year-old boy presents to the Emergency Department with hypotension following a rugby injury. During the game, he was tackled from the side and experienced intense pain in his left lower rib cage. On examination, the patient has a pulse of 140 bpm and a blood pressure of 80/40 mmHg. There is visible bruising over the left flank and tenderness upon palpation. What is the probable diagnosis?
Your Answer: Splenic rupture
Explanation:High Impact Injuries to the Left Flank
High impact injuries to the left flank can result in damage to the spleen or kidney, as well as the ribs and soft tissue. If the patient experiences fractured ribs and hypotension, it is important to suspect a spleen rupture. Fluid resuscitation can be used to determine if the patient responds positively, and a CT scan can be arranged to confirm the diagnosis. Based on the injury grade and physical parameters, a decision can be made to either manage the injury conservatively or operate.
Observation should be conducted in a High Dependency Unit (HDU) setting initially to ensure that any deterioration in haemodynamic parameters can be addressed promptly. CT scans are also useful in trauma cases to rule out other injuries, such as hollow visceral injuries that would require a laparotomy. Renal trauma typically does not cause hypotension unless other organs are also injured, and aortic dissection would require more force.
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This question is part of the following fields:
- Paediatrics
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Question 10
Incorrect
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A 29-year-old man with a history of alcohol misuse disorder presents to the Emergency Department complaining of vomiting and abdominal pain. He reports that the pain has been present for six hours and is focused in the epigastric region, with radiation to the back. The following blood test results were obtained:
- WBC: 18.2 * 109/L (normal range: 4.0 - 11.0)
- Albumin: 26 g/L (normal range: 35 - 50)
- Calcium: 1.9 mmol/L (normal range: 2.0-2.5)
- Glucose: 14 mmol/L
- Amylase: 2000 U/L (normal range: 30-118)
What is the most accurate statement regarding the usefulness of measuring serum amylase in this condition?Your Answer: It is the most specific diagnostic test
Correct Answer: It is useful for diagnosis only
Explanation:Although amylase is useful in diagnosing acute pancreatitis, it does not provide any prognostic information. Therefore, it is only useful for diagnosis. In this patient’s case, his symptoms, history of alcohol excess, and significantly elevated serum amylase strongly support a diagnosis of acute pancreatitis. However, cross-sectional imaging may be necessary to confirm the diagnosis. It is important to note that serum lipase is a more sensitive and specific diagnostic test for acute pancreatitis, particularly in cases of alcohol-induced pancreatitis.
Understanding Acute Pancreatitis
Acute pancreatitis is a condition that is commonly caused by alcohol or gallstones. It occurs when the pancreatic enzymes start to digest the pancreatic tissue, leading to necrosis. The main symptom of acute pancreatitis is severe epigastric pain that may radiate through to the back. Vomiting is also common, and examination may reveal epigastric tenderness, ileus, and low-grade fever. In rare cases, periumbilical discolouration (Cullen’s sign) and flank discolouration (Grey-Turner’s sign) may be present.
To diagnose acute pancreatitis, doctors typically measure the levels of serum amylase and lipase in the blood. While amylase is raised in 75% of patients, it does not correlate with disease severity. Lipase, on the other hand, is more sensitive and specific than amylase and has a longer half-life. Imaging tests, such as ultrasound and contrast-enhanced CT, may also be used to assess the aetiology of the condition.
Scoring systems, such as the Ranson score, Glasgow score, and APACHE II, are used to identify cases of severe pancreatitis that may require intensive care management. Factors that indicate severe pancreatitis include age over 55 years, hypocalcaemia, hyperglycaemia, hypoxia, neutrophilia, and elevated LDH and AST. It is important to note that the actual amylase level is not of prognostic value.
In summary, acute pancreatitis is a condition that can cause severe pain and discomfort. It is typically caused by alcohol or gallstones and can be diagnosed through blood tests and imaging. Scoring systems are used to identify cases of severe pancreatitis that require intensive care management.
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This question is part of the following fields:
- Surgery
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Question 11
Incorrect
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John is a 28-year-old man who presents with complaints of fatigue, muscle pain, and dry eyes. He has also noticed a red-purple rash on his upper cheeks that worsens after sun exposure. Upon further inquiry, he reports frequent mouth ulcers. Based on these symptoms, you suspect systemic lupus erythematosus.
Initial laboratory tests show anemia and proteinuria on urinalysis.
Which test would be most suitable to rule out this diagnosis?Your Answer: Anti-dsDNA antibody
Correct Answer: Antinuclear antibody (ANA)
Explanation:The presence of anti-nuclear antibodies (ANA) is common in the adult population, but it is not a reliable diagnostic tool for autoimmune rheumatic disease without additional clinical features. To accurately diagnose systemic lupus erythematosus (SLE), the presence of anti-dsDNA antibodies, low complement levels, or anti-Smith (Sm) antibodies in patients with relevant clinical features is highly predictive. However, these markers cannot be used as rule-out tests, as there is still a chance of SLE even with a negative result. Anti-Ro/La antibodies are less specific to SLE, as they are also found in other autoimmune rheumatic disorders.
Systemic lupus erythematosus (SLE) can be investigated through various tests, including antibody tests. ANA testing is highly sensitive, making it useful for ruling out SLE, but it has low specificity. About 99% of SLE patients are ANA positive. Rheumatoid factor testing is positive in 20% of SLE patients. Anti-dsDNA testing is highly specific (>99%), but less sensitive (70%). Anti-Smith testing is also highly specific (>99%), but only 30% of SLE patients test positive. Other antibody tests include anti-U1 RNP, SS-A (anti-Ro), and SS-B (anti-La).
Monitoring of SLE can be done through various markers, including inflammatory markers such as ESR. During active disease, CRP levels may be normal, but a raised CRP may indicate an underlying infection. Complement levels (C3, C4) are low during active disease due to the formation of complexes that lead to the consumption of complement. Anti-dsDNA titres can also be used for disease monitoring, but it is important to note that they are not present in all SLE patients. Proper monitoring of SLE is crucial for effective management of the disease.
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This question is part of the following fields:
- Musculoskeletal
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Question 12
Incorrect
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A 22-year-old female comes to the emergency department complaining of lower abdominal pain. The pain began in the middle and is now concentrated on the right side. She reports that the pain is an 8 out of 10 on the pain scale. She is sexually active and not using any contraception except for condoms. During the examination, she experiences pain in the right iliac fossa and rebound tenderness. What initial tests should be conducted during admission to exclude a possible diagnosis?
Your Answer: Serum human chorionic gonadotropin
Correct Answer: Urine human chorionic gonadotropin
Explanation:When a woman experiences pain in the right iliac fossa, it is important to consider gynecological issues as a possible cause of acute abdomen. One potential cause is an ectopic pregnancy, which can manifest in various ways, including abdominal pain. It is important to inquire about the woman’s menstrual cycle, but vaginal bleeding does not necessarily rule out an ectopic pregnancy, as it can be mistaken for a period.
To aid in diagnosis and management, a pregnancy test should be conducted. Even if a woman presents with non-specific symptoms, NICE guidelines recommend offering a pregnancy test if pregnancy is a possibility. A urine human chorionic gonadotropin (hCG) test is a safe and non-invasive way to confirm or rule out an ectopic or intrauterine pregnancy.
Serum hCG is used to determine management in cases of unknown pregnancy location and is commonly used as a pregnancy test. Further investigations, such as ultrasound or CT scans of the abdomen and pelvis, may be necessary depending on the results of the pregnancy test.
Possible Causes of Right Iliac Fossa Pain
Right iliac fossa pain can be caused by various conditions, and it is important to differentiate between them to provide appropriate treatment. One of the most common causes is appendicitis, which is characterized by pain radiating to the right iliac fossa, anorexia, and a short history. On the other hand, Crohn’s disease often has a long history, signs of malnutrition, and a change in bowel habit, especially diarrhea. Mesenteric adenitis, which mainly affects children, is caused by viruses and bacteria and is associated with a higher temperature than appendicitis. Diverticulitis, both left and right-sided, may present with right iliac fossa pain, and a CT scan may help in refining the diagnosis.
Other possible causes of right iliac fossa pain include Meckel’s diverticulitis, perforated peptic ulcer, incarcerated right inguinal or femoral hernia, bowel perforation secondary to caecal or colon carcinoma, gynecological causes such as pelvic inflammatory disease and ectopic pregnancy, urological causes such as ureteric colic and testicular torsion, and other conditions like TB, typhoid, herpes zoster, AAA, and situs inversus.
It is important to consider the patient’s clinical history, physical examination, and diagnostic tests to determine the underlying cause of right iliac fossa pain. Prompt diagnosis and treatment can prevent complications and improve outcomes.
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This question is part of the following fields:
- Surgery
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Question 13
Correct
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A 75-year-old woman presents with sudden visual loss in her right eye. She reports experiencing flashes and floaters. The patient has a history of myopia and has worn glasses since her early teenage years. Additionally, she has a medical history of hypertension, recurrent deep vein thrombosis, and osteoporosis. Her current medications include amlodipine 5mg once daily, apixaban 2.5mg twice daily, and alendronic acid 70mg once weekly. Upon examination, her visual acuity in the affected eye is 6/12. Fundoscopy reveals a normal optic disc and retinal vessels. What is the most likely diagnosis?
Your Answer: Posterior vitreous detachment
Explanation:Patients with PVD have a high likelihood of developing a retinal tear, which increases their risk of retinal detachment. As a result, it is crucial for these patients to be evaluated by an ophthalmologist within 24 hours.
Understanding Posterior Vitreous Detachment
Posterior vitreous detachment is a condition where the vitreous membrane separates from the retina due to natural changes in the vitreous fluid of the eye with ageing. This is a common condition that does not cause any pain or loss of vision. However, it is important to rule out retinal tears or detachment as they may result in permanent loss of vision. Posterior vitreous detachment occurs in over 75% of people over the age of 65 and is more common in females. Highly myopic patients are also at increased risk of developing this condition earlier in life.
Symptoms of posterior vitreous detachment include the sudden appearance of floaters, flashes of light in vision, blurred vision, and cobweb across vision. If there is an associated retinal tear or detachment, the patient will require surgery to fix this. All patients with suspected vitreous detachment should be examined by an ophthalmologist within 24 hours to rule out retinal tears or detachment.
The management of posterior vitreous detachment alone does not require any treatment as symptoms gradually improve over a period of around 6 months. However, it is important to monitor the condition and seek medical attention if any new symptoms arise. The appearance of a dark curtain descending down vision indicates retinal detachment and requires immediate medical attention. Overall, understanding posterior vitreous detachment and its associated risks is important for maintaining good eye health.
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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 7-year-old girl is diagnosed with Attention Deficit Hyperactivity Disorder and prescribed methylphenidate. What should be monitored during her treatment?
Your Answer: Growth
Explanation:In March 2018, NICE released new guidelines for identifying and managing Attention Deficit Hyperactivity Disorder (ADHD). This condition can have a significant impact on a child’s life and can continue into adulthood, making accurate diagnosis and treatment crucial. According to DSM-V, ADHD is characterized by persistent features of inattention and/or hyperactivity/impulsivity, with an element of developmental delay. Children up to the age of 16 must exhibit six of these features, while those aged 17 or over must exhibit five. ADHD has a UK prevalence of 2.4%, with a higher incidence in boys than girls, and there may be a genetic component.
NICE recommends a holistic approach to treating ADHD that is not solely reliant on medication. After presentation, a ten-week observation period should be implemented to determine if symptoms change or resolve. If symptoms persist, referral to secondary care is necessary, typically to a paediatrician with a special interest in behavioural disorders or to the local Child and Adolescent Mental Health Service (CAMHS). A tailored plan of action should be developed, taking into account the patient’s needs and wants, as well as how their condition affects their lives.
Drug therapy should be considered a last resort and is only available to those aged 5 years or older. Parents of children with mild/moderate symptoms can benefit from attending education and training programmes. For those who do not respond or have severe symptoms, pharmacotherapy may be considered. Methylphenidate is the first-line treatment for children and should be given on a six-week trial basis. It is a CNS stimulant that primarily acts as a dopamine/norepinephrine reuptake inhibitor. Side effects include abdominal pain, nausea, and dyspepsia. Weight and height should be monitored every six months in children. If there is an inadequate response, lisdexamfetamine should be considered, followed by dexamfetamine if necessary. In adults, methylphenidate or lisdexamfetamine are the first-line options, with switching between drugs if no benefit is seen after a trial of the other. All of these drugs are potentially cardiotoxic, so a baseline ECG should be performed before starting treatment, and referral to a cardiologist should be made if there is any significant past medical history or family history, or any doubt or ambiguity.
As with most psychiatric conditions, a thorough history and clinical examination are essential, particularly given the overlap of ADHD with many other psychiatric and
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This question is part of the following fields:
- Paediatrics
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Question 15
Incorrect
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A 57-year-old woman has undergone a mitral valve repair and is experiencing a prolonged recovery in the cardiac intensive care unit. To aid in her management, a pulmonary artery catheter is inserted.
What is one of the calculated measurements provided by the pulmonary artery catheter?Your Answer: Right ventricular pressure
Correct Answer: Cardiac output
Explanation:Measuring Cardiac Output and Pressures with a Pulmonary Artery Catheter
A pulmonary artery catheter can provide direct and derived measurements for assessing cardiac function. Direct measurements include right atrial pressure, right ventricular pressure, pulmonary artery pressure, pulmonary artery wedge pressure, core temperature, and mixed venous saturation. The catheter can also be used to calculate cardiac output using the method of thermodilution. This involves a proximal port with a heater and a distal thermistor that senses changes in temperature.
Pulmonary artery wedge pressure is a direct measurement that can be obtained with the catheter, reflecting left atrial filling. However, it may not always accurately reflect the pressure in the left atrium due to various factors. Right ventricular pressure is another direct measurement that can be obtained.
Central venous saturation is a direct measure in some machines with a built-in saturation measurement probe, while in others, samples can be taken via the distal port and measured using a gas machine. Overall, a pulmonary artery catheter can provide valuable information for monitoring cardiac output and pressures in critically ill patients.
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This question is part of the following fields:
- Anaesthetics & ITU
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Question 16
Correct
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A 32-year-old woman is diagnosed with advanced HIV disease. What is involved in strategic planning with antiretroviral medications?
Your Answer: HIV patients should be started with ART at any CD4 count
Explanation:Myth-busting HIV Treatment Guidelines
Debunking Common Misconceptions about HIV Treatment Guidelines
There are several misconceptions about HIV treatment guidelines that need to be addressed. Firstly, it is not necessary to wait until a patient’s CD4 count drops below 350 cells/ml before starting antiretroviral therapy (ART). Both the World Health Organization (WHO) and the British HIV Association (BHIVA) recommend starting treatment at any CD4 count.
Secondly, intravenous didanosine should not be used for the treatment of pregnant women. The WHO has warned against the use of didanosine and stavudine in pregnant women due to an increased risk of lactic acidosis. Women who are already taking ART and/or PCP prophylaxis before pregnancy should not discontinue their medication. If starting ART during pregnancy, potent combinations of three or more antiretroviral drugs are recommended, but this should be delayed until after the first trimester if possible.
Thirdly, HIV treatment does not involve three nucleoside analogues. Instead, treatment involves a combination of three drugs, which includes two nucleotide reverse transcriptase inhibitors (NRTIs) and one ritonavir-boosted protease inhibitor (PI/r), one non-nucleoside reverse transcriptase inhibitor (NNRTI), or one integrase inhibitor (INI).
Lastly, the use of zidovudine in post-exposure prophylaxis (PEP) for needlestick injuries in healthcare workers does not completely remove the risk of seroconversion. While this treatment option has been shown to reduce the risk, it does not eliminate it entirely.
In conclusion, it is important to stay up-to-date with current HIV treatment guidelines and to dispel any misconceptions that may exist. Starting ART at any CD4 count, avoiding certain medications during pregnancy, using a combination of three drugs, and understanding the limitations of PEP are all crucial components of effective HIV treatment.
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This question is part of the following fields:
- Infectious Diseases
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Question 17
Correct
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A 68-year-old male presents to the emergency department with acute right loin pain which has gotten progressively worse over the last couple of hours. On examination, his heart rate is 78 beats per minute, respiratory rate is 19 breaths per minute, blood pressure is 130/85 mmHg, and temperature is 36.6 ºC.
The abdomen is soft and non-tender with a bulge noted in the groin region superior and medial to the pubic tubercle which is unable to be pushed back in. Bowel sounds are present.
What is the most likely diagnosis based on the patient's symptoms?Your Answer: Inguinal incarcerated hernia
Explanation:When a hernia cannot be pushed back into place, it is called an incarcerated hernia. These types of hernias are usually painless.
The correct option in this case is an inguinal incarcerated hernia. An incarcerated hernia occurs when the herniated tissue becomes trapped and cannot be pushed back into place. This can cause pain, but there are no other symptoms. If the blood supply to the herniated tissue is compromised, it can lead to strangulation. However, in this case, the patient has a tender, distended abdomen with normal bowel sounds, which suggests that it is not a strangulated hernia.
The option of an incarcerated femoral hernia is incorrect because femoral hernias are located inferior and lateral to the pubic tubercle, whereas inguinal hernias are medial and superior.
The option of a femoral strangulated hernia is also incorrect because the patient’s vital signs are normal and there are no systemic symptoms. Additionally, femoral hernias are located inferior and lateral to the pubic tubercle, whereas inguinal hernias are medial and superior.
The absence of systemic symptoms and normal vital signs suggest that the hernia is likely an inguinal incarcerated hernia, rather than a strangulated hernia.
Understanding Strangulated Inguinal Hernias
An inguinal hernia occurs when abdominal contents protrude through the superficial inguinal ring. This can happen directly through the deep inguinal ring or indirectly through the posterior wall of the inguinal canal. Hernias should be reducible, meaning that the herniated tissue can be pushed back into place in the abdomen through the defect using a hand. However, if a hernia cannot be reduced, it is referred to as an incarcerated hernia, which is at risk of strangulation. Strangulation is a surgical emergency where the blood supply to the herniated tissue is compromised, leading to ischemia or necrosis.
Symptoms of a strangulated hernia include pain, fever, an increase in the size of a hernia or erythema of the overlying skin, peritonitic features such as guarding and localised tenderness, bowel obstruction, and bowel ischemia. Imaging can be used in cases of suspected strangulation, but it is not considered necessary and is more useful in excluding other pathologies. Repair involves immediate surgery, either from an open or laparoscopic approach with a mesh technique. This is the same technique used in elective hernia repair, however, any dead bowel will also have to be removed. While waiting for the surgery, it is not recommended that you manually reduce strangulated hernias, as this can cause more generalised peritonitis. Strangulation occurs in around 1 in 500 cases of all inguinal hernias, and indications that a hernia is at risk of strangulation include episodes of pain in a hernia that was previously asymptomatic and irreducible hernias.
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This question is part of the following fields:
- Surgery
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Question 18
Correct
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A 27-year-old primigravid woman at 10 weeks gestation visits her midwife for a routine booking appointment. She has sickle cell anaemia. Her partner’s sickle cell status is Hb AS. Her haemoglobin is 9.2 g / dl.
What is the likelihood of her baby having sickle cell disease?Your Answer: 1 in 2
Explanation:Probability of Inheriting Sickle Cell Disease
Sickle cell anaemia is an autosomal recessive condition that affects the haemoglobin in red blood cells. The probability of a baby inheriting the disease depends on the genotypes of the parents.
If one parent has sickle cell disease (HbSS) and the other is a carrier (HbAS), the baby has a 1 in 2 chance of inheriting the disease and a 1 in 2 chance of being a carrier.
If both parents are carriers (HbAS), the baby has a 1 in 4 chance of inheriting the disease.
If one parent has sickle cell disease (HbSS) and the other is unaffected (HbAA), the baby will be a carrier (HbAS).
If both parents have sickle cell disease (HbSS), the baby will inherit the disease.
It is important for individuals to know their carrier status and to receive genetic counselling before planning a family to understand the risks of passing on genetic conditions.
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This question is part of the following fields:
- Genetics
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Question 19
Correct
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A 29-year-old female presents to the early pregnancy assessment unit at 7 weeks gestation with heavy vaginal bleeding. An ultrasound confirms an intra-uterine miscarriage. After 14 days of expectant management, the patient returns for a follow-up appointment. She reports experiencing light vaginal bleeding and is still haemodynamically stable without signs of ectopic pregnancy. An ultrasound scan confirms an incomplete miscarriage. What would be the most suitable course of action?
Your Answer: Vaginal misoprostol
Explanation:When managing a miscarriage, medical treatment typically involves administering vaginal misoprostol alone. According to the NICE miscarriage Clinical Knowledge Summary, medical management is recommended if expectant management is not suitable or if a woman continues to experience symptoms after 14 days of expectant management. Misoprostol can be given orally or vaginally. If products of conception are not expelled after medical treatment or if symptoms persist after 14 days of expectant management, manual vacuum aspiration or surgical management may be considered. However, hospitalization and observation are not usually necessary unless the patient is experiencing hemodynamic instability. In most cases, women can take misoprostol and complete the miscarriage at home. Oral methotrexate is used for medical management of ectopic pregnancy.
Management Options for Miscarriage
Miscarriage can be a difficult and emotional experience for women. In the 2019 NICE guidelines, three types of management for miscarriage were discussed: expectant, medical, and surgical. Expectant management involves waiting for a spontaneous miscarriage and is considered the first-line option. However, if it is unsuccessful, medical or surgical management may be offered.
Medical management involves using tablets to expedite the miscarriage. Vaginal misoprostol, a prostaglandin analogue, is used to cause strong myometrial contractions leading to the expulsion of tissue. It is important to advise patients to contact their doctor if bleeding does not start within 24 hours. Antiemetics and pain relief should also be given.
Surgical management involves undergoing a surgical procedure under local or general anaesthetic. The two main options are vacuum aspiration (suction curettage) or surgical management in theatre. Vacuum aspiration is done under local anaesthetic as an outpatient, while surgical management is done in theatre under general anaesthetic. This was previously referred to as ‘Evacuation of retained products of conception’.
It is important to note that some situations are better managed with medical or surgical management, such as an increased risk of haemorrhage, being in the late first trimester, having coagulopathies or being unable to have a blood transfusion, previous adverse and/or traumatic experience associated with pregnancy, evidence of infection, and more. Ultimately, the management option chosen should be based on the individual patient’s needs and preferences.
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This question is part of the following fields:
- Gynaecology
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Question 20
Incorrect
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A 25-year-old individual consumes approximately 750 ml of whiskey during a night out. The following day, they experience increased thirst and notice an increase in urine output. What is the most plausible explanation for the development of polyuria in individuals who consume excessive amounts of alcohol?
Your Answer: Osmotic diuresis induced by ethanol
Correct Answer: Ethanol inhibits ADH secretion
Explanation:The secretion of antidiuretic hormone (ADH), which is dependent on calcium, is inhibited by ethanol through the blocking of channels in the neurohypophyseal nerve terminal. Hangover-induced nausea is primarily caused by vagal stimulation of the vomiting center. Tremors that may occur after a particularly intense bout of alcohol consumption are a result of increased glutamate production by neurons, which compensates for the previous inhibition caused by ethanol.
Management of Problem Drinking: Nutritional Support and Drug Therapy
Problem drinking can have serious consequences on an individual’s health and well-being. To manage this condition, nutritional support and drug therapy are often recommended. According to SIGN guidelines, alcoholic patients should receive oral thiamine if their diet is deficient. This is because alcohol can deplete the body’s thiamine levels, which can lead to neurological complications such as Wernicke-Korsakoff syndrome.
In addition to nutritional support, drug therapy can also be used to manage problem drinking. Benzodiazepines are commonly used for acute withdrawal symptoms, while disulfiram is used to promote abstinence. Disulfiram works by inhibiting acetaldehyde dehydrogenase, which causes a severe reaction when alcohol is consumed. Patients should be aware that even small amounts of alcohol found in perfumes, foods, and mouthwashes can produce severe symptoms. However, disulfiram is contraindicated in patients with ischaemic heart disease and psychosis.
Another drug used to manage problem drinking is acamprosate. This medication reduces cravings and has been shown to improve abstinence in placebo-controlled trials. Acamprosate is a weak antagonist of NMDA receptors, which are involved in the brain’s reward system. By blocking these receptors, acamprosate can help reduce the pleasurable effects of alcohol and decrease the likelihood of relapse.
In summary, managing problem drinking requires a multifaceted approach that includes nutritional support and drug therapy. By addressing both the physical and psychological aspects of alcohol dependence, individuals can achieve and maintain sobriety.
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This question is part of the following fields:
- Pharmacology
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