Nokea
In statistical methodology:
- A. The median and mean are different when the population distribution is skewed
- B. Mode refers to the value that occurs with the highest frequency
- C. The value of 'r' (coefficient of variation) ranges from -1 to +1
- D. Incidence is defined as the number of cases seen in the population at any given period of time
Correct Answer: A
Rationale: The median and mean differ in skewed distributions because the mean is influenced by extreme values, while the median is not.
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Depending on the frequency and severity of hypercyanotic attacks in tetralogy of Fallot, all the following procedures are true EXCEPT
- A. placement of the infant in the knee-chest position
- B. administration of oxygen
- C. injection of morphine subcutaneously
- D. rapid correction with intravenous sodium bicarbonate
Correct Answer: D
Rationale: Intravenous sodium bicarbonate is not typically used for hypercyanotic attacks.
A client with Guillain-Barre syndrome has paralysis of all extremities and requires mechanical ventilation. The nurse observes that the client is not blinking. Which action should the nurse implement?
- A. Protect cornea with lubricant and eye shields
- B. Administer artificial tears every hour.
- C. Encourage the client to blink every 10 minutes.
- D. Keep the client's eyes closed with adhesive tape.
Correct Answer: A
Rationale: Lack of blinking increases the risk of corneal damage. Lubricants and eye shields prevent dryness and injury to the cornea.
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.
What are FOUR possible causes of left axis deviation in a newborn with features of Trisomy 21?
- A. AVSD
- B. Tricuspid atresia
- C. Pulmonary atresia with intact ventricular septum
- D. Mechanical shift
Correct Answer: A
Rationale: AVSD is a common congenital heart defect associated with Trisomy 21 and can lead to left axis deviation seen on ECG.
All of the following are minor criteria in the latest Revised Jones criteria for rheumatic fever in moderate-high risk population except
- A. Monoarthalgia
- B. Fever with body temperature ≥ 38.5°C
- C. ESR 230 mm/hour
- D. Prolonged PR interval
Correct Answer: C
Rationale: ESR 230 mm/hour is not a minor criterion in the Revised Jones criteria for rheumatic fever.