Nokea
In a child with scabies, which of the following is the most appropriate treatment?
- A. Permethrin
- B. Benzoyl peroxide
- C. Hydrocortisone
- D. Calamine lotion
Correct Answer: A
Rationale: Permethrin cream is the most effective treatment for scabies, as it targets the mites causing the infestation.
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Mechanisms of dyspnea in left heart disease include all, except
- A. PVH and decreased lung compliance
- B. Respiratory muscle fatigue
- C. Elevated LV End diastolic pressure leads to decreased antegrade coronary blood flow
- D. Reverse 'Bernheim' effect
Correct Answer: C
Rationale: Elevated LV end-diastolic pressure does not typically lead to decreased antegrade coronary blood flow.
SVT in children differ from physiologic sinus tachycardia by all the following EXCEPT
- A. sudden onset and termination
- B. persistent ventricular rate of >180 bpm
- C. fixed RR interval on ECG
- D. evident change in heart rate with activity
Correct Answer: D
Rationale: Physiologic sinus tachycardia can show changes in heart rate with activity, unlike SVT which has a fixed rate.
Mitral valve prolapse
- A. Occurs in congenital myxomatous valves
- B. Need a Sx
- C. Rare cause of MR
- D. Need prophylactic antibiotics
Correct Answer: A
Rationale: Mitral valve prolapse often occurs in congenital myxomatous valves.
In a cyanotic spell of TOF
- A. Systemic vascular resistance is reduced
- B. Murmur disappear
- C. PO2 is reduced
- D. Right to Left shunt is Increased
Correct Answer: D
Rationale: During a cyanotic spell in Tetralogy of Fallot, there is an increased right-to-left shunting through the ventricular septal defect.
Which vaccines must be delayed for 11 months after the administration of gamma globulin? (Select all that apply.)
- A. Diphtheria, tetanus, and pertussis
- B. Hepatitis B
- C. Inactivated polio virus
- D. Measles, mumps, and rubella
Correct Answer: D
Rationale: Live virus vaccines (MMR and Varicella) should be delayed for 11 months after gamma globulin infusion because the passive antibodies can interfere with vaccine efficacy.