Nokea
In 90% of cases of endocarditis, the causative agent is recovered from the first 2 blood cultures. Antimicrobial pretreatment of the patient reduces the yield of blood cultures to
- A. 10%
- B. 20%
- C. 30%
- D. 40%
Correct Answer: A
Rationale: Antimicrobial pretreatment can significantly reduce the yield of blood cultures, often to 10-20%.
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Nurse Roy is administering total parental nutrition (TPN) through a peripheral I.V. line to a school-age child. What’s the smallest amount of glucose that’s considered safe and not caustic to small veins, while also providing adequate TPN?
- A. 5% glucose
- B. 10% glucose
- C. 15% glucose
- D. 17% glucose
Correct Answer: B
Rationale: A 10% glucose solution is safe for peripheral veins and provides adequate nutrition without causing irritation or damage.
Toddler's diarrhoea is characterised by:
- A. Onset over 18 months
- B. Failure to thrive
- C. Excessive consumption of cow's milk
- D. Undigested food particles in the stool
Correct Answer: D
Rationale: The correct answer is D because undigested food particles in the stool are a hallmark of toddler's diarrhoea. The other options (a, b, c, e) are less specific.
What are THREE long-term complications that can occur after repair of coarctation of the aorta in an infant?
- A. Berry aneurysms
- B. Persistent systemic hypertension
- C. Re-coarctation
- D. All of the above
Correct Answer: D
Rationale: Long-term follow-up is necessary for patients who have undergone repair of coarctation due to risks of recurrence or complications.
The following are recognised features of achondroplasia:
- A. Shortened spine
- B. Increased liability to pathological fractures
- C. Can be diagnosed radiologically at birth
- D. Infertility
Correct Answer: C
Rationale: Achondroplasia can be diagnosed radiologically at birth. The spine is not shortened, fractures are not increased, and infertility is not a feature.
A child has an elevated antistreptolysin O (ASO) titer. Which combination of symptoms, in conjunction with this finding, would confirm a diagnosis of rheumatic fever?
- A. Subcutaneous nodules and fever
- B. Painful, tender joints, and carditis
- C. Erythema marginatum and arthralgia
- D. Chorea and elevated sedimentation rate
Correct Answer: B
Rationale: The presence of two major Jones criteria would indicate a high probability of rheumatic fever.