Nokea
The following statements are true of bronchiolitis:
- A. Up to 50% of patients continue to wheeze after recovery
- B. The typical pathogen is para-influenza virus
- C. Corticosteroid therapy is beneficial
- D. Tachypnoea is invariable
Correct Answer: A
Rationale: Wheezing after bronchiolitis is common. The typical pathogen is respiratory syncytial virus, not para-influenza. Corticosteroids are not routinely beneficial, and tachypnoea is common but not invariable.
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Which occurs in septic shock?
- A. Hypothermia
- B. Increased cardiac output
- C. Vasoconstriction
- D. Angioneurotic edema
Correct Answer: B
Rationale: Increased cardiac output, which results in warm, flushed skin, is one of the manifestations of septic shock. Fever and chills are characteristic of septic shock. Vasodilation is more common than vasoconstriction. Angioneurotic edema occurs as a manifestation in anaphylactic shock.
Which of the following conditions results primarily from mutation in the gene encoding Vitamin D receptor?
- A. Vitamin D dependent rickets type 1
- B. Vitamin D dependent rickets type 2
- C. X-linked hypophosphatemic rickets
- D. Autosomal dominant hypophosphatemic rickets
Correct Answer: B
Rationale: Vitamin D dependent rickets type 2 is caused by mutations in the vitamin D receptor gene, leading to resistance to vitamin D.
The MOST common cause of death from associated cardiac lesions without heart syndrome in the first month of life is
- A. d-Transposition
- B. hypoplastic left heart syndrome
- C. pulmonary atresia
- D. truncus arteriosus
Correct Answer: A
Rationale: d-Transposition of the great arteries is a common cause of death in the first month due to mixing of oxygenated and deoxygenated blood.
What is the recommended hourly maintenance fluid rate (water) for a 20 kg child?
- A. 50 ml/hour
- B. 60 ml/hour
- C. 80 ml/hour
- D. 100 ml/hour
Correct Answer: B
Rationale: The recommended hourly maintenance fluid rate for a 20 kg child is 60 ml/hour, calculated using the formula: 100 ml/kg for the first 10 kg + 50 ml/kg for the next 10 kg.
A 12-month-old infant who had cardiopulmonary bypass with RBC and plasma infusions during surgery at 8 months is seen for a well child examination. Which vaccine may be administered at this visit?
- A. Measles
- B. mumps
- C. and rubella (MMR)
- D. Oral polio vaccine (OPV)
Correct Answer: C
Rationale: Live vaccines should be delayed until 6 months after cardiopulmonary bypass and exposure to RBCs and plasma. PCV-13 is not a live-virus vaccine.