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Question 1
Incorrect
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A 10-month-old boy is brought to clinic. His parents are concerned because two days ago, he met another child with mumps. Which is the most appropriate strategy for this child?
Your Answer: He should receive MMR plus mumps immunoglobulin now
Correct Answer: Do nothing now but give MMR at the appropriate age
Explanation:Immunity against mumps develops over a long time. There is nothing to be done except to proceed with the usual vaccination schedule.
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This question is part of the following fields:
- Infectious Diseases
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Question 2
Incorrect
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Which is the most accurate statement regarding scabies?
Your Answer:
Correct Answer: Positive mineral oil mount is diagnostic
Explanation:The diagnosis of scabies can often be made clinically in patients with a pruritic rash and characteristic linear burrows. Definitive testing relies on the identification of mites or their eggs, eggshell fragments, or scybala. This is best undertaken by placing a drop of mineral oil directly over the burrow on the skin and then superficially scraping longitudinally and laterally across the skin with a scalpel blade. (Avoid causing bleeding.) Scraping 15 or more burrows often produces only 1 or 2 eggs or mites, except in a case of crusted scabies, in which many mites will be present. The sample is placed on a microscope slide and examined under low and high power. Potassium hydroxide should not be used, since it can dissolve mite pellets. Failure to find mites is common and does not rule out the diagnosis of scabies.
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This question is part of the following fields:
- Dermatology
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Question 3
Incorrect
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An 18-year-old homosexual male presents 36 hours after having unprotected sex with his partner whose HIV status is not known. He is concerned about his risk of acquiring HIV. He is feeling well and shows no symptoms. The physician offers him a post exposure prophylaxis, which consists of 3 different antiviral drugs. Two of these drugs act by which of the following mechanisms?
Your Answer:
Correct Answer: Inhibition of viral reverse transcriptase
Explanation:Recommended regimens3 NRTI (e.g., zidovudine, lamivudine, abacavir) OR2 NRTI (e.g., lamivudine + abacavir) AND1 NNRTI (e.g., efavirenz) OR1 PI (e.g., lopinavir) OR1 INI (e.g., raltegravir)
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This question is part of the following fields:
- HIV
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Question 4
Incorrect
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Which of the following statements is correct regarding erythema nodosum?
Your Answer:
Correct Answer: The typical eruption is symmetrical, tender, and with bruise like lesions to the shins, ankles, and knees
Explanation:Erythema nodosum is the most common type of inflammation of the subcutaneous fat tissue, referred to as panniculitis. Erythema nodosum appears as painful, erythematous round lumps, usually symmetrically on the anterior aspect of lower extremities. These lesions are self-limiting and tend to resolve within 2-8 weeks without undergoing necrosis or ulceration. There are various causes of erythema nodosum, but the most important among children is the streptococcal throat infection. Other causes include autoimmune conditions like sarcoidosis, inflammatory bowel disease, mycobacterial infection (TB), drugs like penicillin and sulphonamides, and malignancies like some leukemias and lymphomas.
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This question is part of the following fields:
- Dermatology
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Question 5
Incorrect
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Persistent hypoglycaemia in the new-borns is caused by which of the given choices?
Your Answer:
Correct Answer: Medium chain acyl CoA dehydrogenase deficiency
Explanation:Neonatal hypoglycaemia is a common yet serious condition characterized by blood sugar levels less than 2.2mmol/L during the first 3 days of life and less than 2.5mmol/L later on. There are multiple aetiologies and various risk factors that lead to hypoglycaemia in new-borns like prematurity, sepsis, inborn errors of metabolism, and maternal diabetes- induced hyperinsulinism in the new-born. Among the inborn errors of metabolism, fatty acid oxidation defects can lead to persistent hypoglycaemia in new-borns. One such defect is the medium- chain acyl CoA dehydrogenase deficiency, which is the enzyme needed for the breakdown of medium- chain fatty acids.
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This question is part of the following fields:
- Neonatology
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Question 6
Incorrect
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Which of the following is a risk factor for neonatal death and stillbirth?
Your Answer:
Correct Answer: Parental unemployment
Explanation:Risk factors for neonatal death and stillbirth (weak predictive value):- African American race- Advanced maternal age- History of fetal demise- Maternal infertility- History of small for gestational age infant- Small for gestational age infant- Obesity- Paternal age- Poverty and poor quality of careSo in this case the risk factor is the parental unemployment
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This question is part of the following fields:
- Neonatology
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Question 7
Incorrect
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A 6 year old female child with a history of controlled type 1 diabetes, presents with recurrent nightmares due to hypoglycaemia and early morning glycosuria. Her parents are well informed about the child's condition and adjust her insulin requirements according to carbohydrate counting. What is the cause of the hypoglycaemia during the night in association with early morning glycosuria?
Your Answer:
Correct Answer: Somogyi effect
Explanation:Somogyi effect presents with night-time hypoglycaemia followed by early-morning hyperglycaemia, hence the glycosuria.
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This question is part of the following fields:
- Endocrinology
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Question 8
Incorrect
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A 9 year old boy was admitted with gastroenteritis. The boy's symptoms started two days ago with profound diarrhoea and emesis. Blood exams show the following: Sodium=148mmol/l, Potassium=2.2mmol/l, Urea=20mmol/l, Glucose=4.3mmol/l. What would be the best management?
Your Answer:
Correct Answer: V normal saline and potassium supplement
Explanation:The boy needs re-hydration and hydro-electrolytic re-balancing due to fluid losses from the gastroenteritis and subsequent dehydration.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 9
Incorrect
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A 6-year-old boy was admitted with a burn that looks third or fourth degree upon inspection. He has not stopped crying. What is the most appropriate next step?
Your Answer:
Correct Answer: IV fluid start
Explanation:The boy needs re-hydration due to his full thickness burn so IV fluids is the next most appropriate step. The greatest loss of plasma occurs in the first 12 hours after burn injury. The plasma loss then slowly decreases during the second 12 hours of the post-burn phase, although extensive leakage can continue for up to three days (Ahrns, 2004). Optimal fluid replacement during this period is essential to ensure cardiac output and renal and tissue perfusion. Usually, 36 hours post-burn, capillary permeability returns to normal and fluid is drawn back into the circulation. Burns of more than 15% of surface body area in adults and of over 10% in children warrant formal resuscitation.The Parkland formula for the total fluid requirement in 24 hours is as follows:4ml x TBSA (%) x body weight (kg);50% given in first eight hours;50% given in next 16 hours.Children receive maintenance fluid in addition, at an hourly rate of:4ml/kg for the first 10kg of body weight plus;2ml/kg for the second 10kg of body weight plus;1ml/kg for >20kg of body weight.End pointUrine -adults: 0.5-1.0 ml/kg/hour;Urine -children: 1.0-1.5ml/kg/hour.
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This question is part of the following fields:
- Emergency Medicine
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Question 10
Incorrect
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Which of the following is true regarding primitive reflexes in a 12-month-old infant?
Your Answer:
Correct Answer: The Moro reflex is absent
Explanation:Primitive reflexes are central nervous system responses, many of which disappear as a child matures. Retention of these reflexes may point to atypical neurology such as in cerebral palsy or stroke. However, some persist into adulthood. The stepping reflex is present from birth and normally disappears by 6 weeks, while the moro reflex is present from birth to about 4 months. The asymmetrical tonic neck reflex disappears by about 6 months. Reflexes that persist include the head righting reflex which develops at 6 months, and the parachute reflex which develops at 9 months.
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This question is part of the following fields:
- Child Development
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Question 11
Incorrect
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A 13-month-old boy presents to the hospital with a rash and breathing difficulties following routine vaccination. On examination, it was noted that he was developing swelling around the mouth and neck.What is the most appropriate next step to manage this child?
Your Answer:
Correct Answer: IM adrenaline 150 mcg (0.15ml of 1 in 1,000)
Explanation:The IM dose of adrenaline for anaphylaxis in:< 6 months: 150 micrograms (0.15ml 1 in 1,000)6 months – 6 years: 150 micrograms (0.15ml 1 in 1,000)6 – 12 years: 300 micrograms (0.3ml 1 in 1,000)Adult and child > 12 years: 500 micrograms (0.5ml 1 in 1,000)Anaphylaxis:Anaphylaxis is an acute, rapidly progressing, potentially life-threatening IgE mediated Type I hypersensitivity reaction.It involves the release of mediators from mast cells, basophils and inflammatory cells. It is characterised by oedematous swelling of the airway mucosa giving rise to dyspnoea and respiratory distress. The most common cause of anaphylaxis in children is a food allergy.Risk factors for death in patients with anaphylaxis include asthma, age 11+, peanut allergy, and delay in adrenaline administration.Management of anaphylaxis includes:- ABCD- Remove the allergen- IM adrenaline or Nebulised adrenaline- IV Hydrocortisone – pro re nata IV fluid support. – Followed by observation.
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This question is part of the following fields:
- Emergency Medicine
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Question 12
Incorrect
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A new-born baby has an abdominal wall defect diagnosed antenatally. When admitted to the neonatal unit, there is a sac found covering a 3cm defect with what appears to be intestine; no liver is visible. The baby has no dysmorphic features other than a large tongue. What is the immediate danger with this baby?
Your Answer:
Correct Answer: Beckwith-Wiedermann syndrome, risk of hypoglycaemia
Explanation:Beckwith-Wiedemann Syndrome (BWS) was first characterized by Patients having abdominal wall defects, macrosomia, macroglossia, and enlarged adrenal glands. Since then, the clinical presentation has expanded to recognize hemihypertrophy/lateralized overgrowth, hyperinsulinism, omphalocele, and organomegaly as classic features of BWS.About 50% of children with BWS have hypoglycaemia and therefore patients with diagnosed BWS should be evaluated for hypoglycaemia. Hypoglycaemia in most BWS new-borns generally resolves within the first few days of life. However, in about 5% of patients that have hyperinsulinism, the severe prolonged hypoglycaemia requires escalated therapy ranging for medication (diazoxide) to partial pancreatectomy.
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This question is part of the following fields:
- Paediatric Surgery
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Question 13
Incorrect
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A child presents with a history of recurrent tonsillitis. His mother claims he had three attacks in one year. What is the best management?
Your Answer:
Correct Answer: Treat when ill
Explanation:At least seven episodes in the previous year, five episodes in each of the previous two years, or three episodes in each of the previous three years are indications for tonsillectomy. Antibiotics should be administered in the conventional dosage for proved or suspected streptococcal episodes. For now the child should be treated on a case by case basis.
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This question is part of the following fields:
- ENT
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Question 14
Incorrect
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Which of the following is true regarding teenage pregnancy?
Your Answer:
Correct Answer: Maternal weight gain is maximum during mid-pregnancy
Explanation:Teenagers may have poor eating habits and neglect to take their vitamin supplements. They are less likely than older women to be of adequate pre-pregnancy weight or to gain an adequate amount of weight during pregnancy. Low weight gain increases the risk of having a low birthweight baby. Weight gain is maximal during the 2nd trimester.aPTT and gallbladder emptying is decreased during pregnancy whereas d-dimers is increased.
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This question is part of the following fields:
- Adolescent Health
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Question 15
Incorrect
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A healthy male who has a brother with cystic fibrosis. His wife, who has no family history of cystic fibrosis, wants to know their chance of having a child affected by cystic fibrosis.What is the best estimate of the risk if the population carrier rate of cystic fibrosis is 1 in 25?
Your Answer:
Correct Answer: 1 in 150
Explanation:CF is inherited in an autosomal recessive manner.This means that to have CF, a person must have a mutation in both copies of the CFTR gene in each cell. People with CF inherit one mutated copy of the gene from each parent, who is referred to as a carrier.CF carriers can pass their copy of the CFTR gene mutation to their children. Each time two CF carriers have a child together, the chances are: 25 percent (1 in 4) the child will have CF50 percent (1 in 2) the child will be a carrier but will not have CF25 percent (1 in 4) the child will not be a carrier of the gene and will not have CFThis male’s parents are obligate carrier because he has a sibling with CFSo the chances he is a carrier too are 2 in 3The risk of having an affected child is the chance of both himself and his partner being carriers: (2/3 x 1/25 = 2/75) x 1/4 = 1/150.
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This question is part of the following fields:
- Genetics And Dysmorphology
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Question 16
Incorrect
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A 16-year-old girl presents to the dermatologist due to an appearance of an odd patch of skin on her left thigh which has developed over a period of two weeks. Physical examination reveals a firm, slightly indurated pale area of skin with an erythematous border on the upper thigh. the lesion has a glazed appearance and is rather atrophic. From the options provided below, which one is the most likely diagnosis?
Your Answer:
Correct Answer: Morphoea
Explanation:Morphea, also known as localized scleroderma, is a disorder characterized by excessive collagen deposition leading to thickening of the dermis, subcutaneous tissues, or both. Morphea is classified into circumscribed, generalized, linear, and pansclerotic subtypes according to the clinical presentation and depth of tissue involvement. Unlike systemic sclerosis, morphea lacks features such as sclerodactyly, Raynaud phenomenon, nailfold capillary changes, telangiectasias, and progressive internal organ involvement. Morphea can present with extracutaneous manifestations, including fever, lymphadenopathy, arthralgias, fatigue, central nervous system involvement, as well as laboratory abnormalities, including eosinophilia, polyclonal hypergammaglobulinemia, and positive antinuclear antibodies.
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This question is part of the following fields:
- Dermatology
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Question 17
Incorrect
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Which of the following conditions are most commonly associated with pruritus:
Your Answer:
Correct Answer: Lichen planus
Explanation:Itchy skin conditions include:Allergy & anaphylaxisAthletes footAtopic dermatitisContact dermatitisDrug allergyErythema multiformeFolliculitisImpetigoInsect bites, stings, infestationsKawasaki diseaseLichen planusNummular eczemaPityriasis roseaPsoriasisScabiesTinea corporisToxic epidermal necrolysisUrticariaVaricellaViral exanthemNote: Miliaria rubra is itchy, miliaria profunda usually isn’t.
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This question is part of the following fields:
- Dermatology
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Question 18
Incorrect
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Which among the following genetic conditions, does NOT present with cataracts?
Your Answer:
Correct Answer: Neurofibromatosis type 1 (NF1)
Explanation:Neurofibromatosis Type 1 (also known as von Recklinghausen disease) does not present with cataracts.The eye findings in NF1 are Lisch’s nodules, which are pigmentary lesions seen on the iris and constitute one of the major diagnostic features in this condition. Note:Interestingly, in another syndrome closely related to it, Neurofibromatosis type 2 (NF-2), cataracts can occur. Early detection in family members may be made by finding lens opacities (both congenital polar cataracts and posterior lenticular opacities). Other options:- Incontinentia pigmenti is an X-linked dominant disorder with pigmentary skin changes, mental retardation and eye involvement in 40% of cases. – Myotonic dystrophy is a triplet-repeat disorder with neurological symptoms and cataracts. – Lowe syndrome (oculo-cerebro-renal syndrome) is an X-linked recessive condition. Males with this X-linked recessive condition have cataracts, hypotonia, mental retardation, generalised aminoaciduria and renal tubular acidosis with hypophosphatemia. – Wilson disease is an inborn error of copper metabolism. The clinical features include hepatic involvement, progressive neurological features, eye involvement, including Kayser-Fleischer rings and cataracts.
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This question is part of the following fields:
- Genetics And Dysmorphology
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Question 19
Incorrect
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A 3-year-old girl presented with faecal incontinence for 2 weeks. Abdominal examination revealed a mass in right lower quadrant. Which of the following is the most appropriate management for this girl?
Your Answer:
Correct Answer: Laxatives
Explanation:Laxatives have been shown to be beneficial in the treatment of chronic childhood constipation. Studies have shown that polyethylene glycol, mineral oil, magnesium hydroxide, and lactulose are effective and can be used for a prolonged periods without risk.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 20
Incorrect
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Conjugated hyperbilirubinemia does NOT occur in which of the following conditions?
Your Answer:
Correct Answer: Spherocytosis
Explanation:Neonatal hyperbilirubinemia is a common clinical condition and can be categorized as conjugated and unconjugated hyperbilirubinemia. Conjugated hyperbilirubinemia results from obstructive or hepatocellular causes mainly. The causes of conjugated hyperbilirubinemia include inborn errors of metabolism like galactosemia and aminoaciduria, obstruction from choledochal cysts, and biliary atresia. Long term TPN also leads to conjugated hyperbilirubinemia. Spherocytosis is a hereditary condition belonging to the group of haemolytic anaemias, resulting from plasma membrane protein deficiency. This defect of the RBC plasma membrane decreases their life span, making them osmotically fragile and prone to haemolysis. This leads to an increase in the unconjugated bilirubin levels, with a risk of developing kernicterus.
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This question is part of the following fields:
- Neonatology
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Question 21
Incorrect
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An 8-year-old boy is presented with arthritis, cough and non-blanching purpura. His coagulation profile is normal. His CBC: Hb 11.8 TLC 7.2*10^9 Plt 286*10^9. What is the most likely diagnosis?
Your Answer:
Correct Answer: Henoch-Schonlein Purpura (HSP)
Explanation:The best answer is Henoch-Schonlein Purpura (HSP). This patient has a characteristic rash and the labs are consistent with this diagnosis.
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This question is part of the following fields:
- Cardiovascular
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Question 22
Incorrect
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In women undergoing breast augmentation, what is the percentage reduction with respect to successful breastfeeding?
Your Answer:
Correct Answer: 25%
Explanation:Breastfeeding may be significantly impaired (up to 25%) by breast augmentation. Equally, breast engorgement, which occurs due to vascular congestion, reduces nipple protrusion and subsequent ability to breastfeed successfully. In the latter, regular feeding or expressing is required.
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This question is part of the following fields:
- Neonatology
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Question 23
Incorrect
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A 6 month old child was brought in after choking on a foreign body, which had resulted in the child having difficulty breathing. The best possible site for the incision would be?
Your Answer:
Correct Answer: Cricoid cartilage
Explanation:Cricothyroidectomy is done in life threatening condition, where an incision is made in cricothyroid membrane to establish a patent airway.
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This question is part of the following fields:
- ENT
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Question 24
Incorrect
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A 13-year-old child who is undergoing assisted ventilation following traumatic brain injury develops new-onset bradycardia and hypertension.Which of the following can improve his current condition?
Your Answer:
Correct Answer: Mannitol 20%
Explanation:All of the presenting features of the child are suggestive raised intracranial pressure. Thus, urgent treatment with 20% Mannitol can improve the child’s condition. Mannitol is an osmotic diuretic that is used in the treatment of raised intracranial pressure. It should be avoided in hypovolaemia because of its diuretic effects. Other options:- Head up at 15°: Keeping the head up at 20° in the midline will aid venous drainage. – Maintain CO2 at 5 kPa: If there is an acute rise in intracranial pressure, then lowering the CO2 to 4-4.5 kPa as a temporary measure can be beneficial. However, this must be only short-lived since it causes vasoconstriction and can impair cerebral blood flow. – 10% glucose bolus: Maintaining normoglycemia in traumatic brain injury is important. – 0.9% saline infusion: Hypertonic saline infusion of 3% can reduce intracranial pressure. 0.9% saline as a bolus could be beneficial if there were hypotension.
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This question is part of the following fields:
- Emergency Medicine
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Question 25
Incorrect
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A child is admitted with a febrile illness. Which of the following is of concern?
Your Answer:
Correct Answer: A 6 month old with a systolic blood pressure of 60
Explanation:Age (years) Respiratory rate (per minute) Heart rate (per minute) Systolic blood pressure12 15-20 60-100 100-120Adapted from Advanced Paediatric Life Support Manual
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This question is part of the following fields:
- Emergency Medicine
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Question 26
Incorrect
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What is the prevalence of atopic eczema in children?
Your Answer:
Correct Answer: 15-20%
Explanation:Atopic dermatitis (AD), also called atopic eczema, is a common chronic or recurrent inflammatory skin disease and affects 15-20% of children and 1-3% of adults worldwide. It is characterized by acute flare-ups of eczematous pruritic lesions over dry skin.The incidence has increased by 2- to 3-fold during the past decades in industrialized countries.Some of the most valuable AD prevalence and trend data have come from the International Study of Asthma and Allergies in Childhood (ISAAC). This is the biggest (close to 2 million children in 100 countries) and only allergy study that has taken a truly global approach. The strength of the study is the use of a uniformly validated methodology allowing a direct comparison of results between paediatric populations all over the world (http://isaac.auckland.ac.nz/index.html).
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This question is part of the following fields:
- Dermatology
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Question 27
Incorrect
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A term baby was born following a placental abruption. There was no respiratory effort and an undetectable heart rate initially. Baby is now 20 min old and has been intubated with regular ventilation breaths. Heart rate came up to 110/min following two rounds of chest compressions. Baby appears very pale. No drugs have been given. Oxygen saturations are currently 85% measured on the right hand despite FiO2 1.0. A venous cord gas shows pH 6.89, CO2 -8, BE -14, Hb 8. What is the next most appropriate step?
Your Answer:
Correct Answer: Umbilical venous catheter (UVC) placement
Explanation:Umbilical vein catheterization utilizes the exposed umbilical stump in a neonate as a site for emergency central venous access up to 14 days old. Umbilical vein catheterization can provide a safe and effective route for intravenous delivery of medications and fluids during resuscitation.The indication for umbilical vein catheterization is when there is a need for IV access in a neonate for resuscitation, transfusions, or short-term venous access when otherwise unobtainable.
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This question is part of the following fields:
- Neonatology
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Question 28
Incorrect
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A 2-day old baby who suffered from voiding difficulties is diagnosed with hypospadias. Which of the following abnormalities is most often associated with this condition?
Your Answer:
Correct Answer: Cryptorchidism
Explanation:Hypospadias is an abnormality of anterior urethral and penile development. The urethral opening is located on the ventral aspect of the penis proximal to the tip of the glans penis, which, in this condition, is open. The urethral opening may be located as proximal as in the scrotum or perineum. The penis may also have associated ventral shortening and curvature, called chordee, with more proximal urethral defects.
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This question is part of the following fields:
- Nephro-urology
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Question 29
Incorrect
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A child presents to the clinic with the complaints of pale stools and jaundice. Which of the following tests would be most helpful in establishing a diagnosis?
Your Answer:
Correct Answer: US abdomen
Explanation:The patient is most likely suffering from obstructive jaundice. Ultrasound of the abdomen is the superior diagnostic tool in detecting and assessing biliary system obstruction, because it is easy, available, accurate and non-invasive.
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This question is part of the following fields:
- Gastroenterology And Hepatology
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Question 30
Incorrect
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A 15-year-old girl is brought to the OBGYN clinic by her mother with primary amenorrhoea and poor pubertal development. Investigations reveal low oestrogen, and high LH and FSH. Which of the following is the most likely diagnosis?
Your Answer:
Correct Answer: Turner's syndrome
Explanation:Turner syndrome, a condition that affects only females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing. Turner syndrome can cause a variety of medical and developmental problems, including short height, failure of the ovaries to develop and heart defects.Turner syndrome may be diagnosed before birth (prenatally), during infancy or in early childhood. Occasionally, in females with mild signs and symptoms of Turner syndrome, the diagnosis is delayed until the teen or young adult years.
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This question is part of the following fields:
- Endocrinology
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