10 Random Questions
During a cardiac arrest with effective chest compression and positive-pressure ventilation, 50 mEq of sodium bicarbonate is administered. Which of the following is the most likely result?
- (A) Decreased mixed venous pH
- (B) Decreased SpO2
- (C) Increased PetCO2
- (D) Increased plasma lactate concentration
- (E) Increased serum potassium concentration
The induction dose of thiopental should be decreased in each of the following situations EXCEPT
- (A) age greater than 70 years
- (B) cardiogenic shock
- (C) decreased hepatic blood flow
- (D) hypoalbuminemia
- (E) hypothyroidism
Of the following, the most reliable criterion for adequate clinical reversal of neuromuscular blockade is
- (A) return of twitch height to 90% of normal
- (B) peak inspiratory force of -20 cmH20
- (C) T4:T1 ratio of 0.75 for train of four
- (D) normal tidal volume
- (E) disappearance of post-tetanic facilitation
The portion of the infant airway with the smallest cross-sectional area occurs at the level of the
- (A) cricoid cartilage
- (B) false vocal cords
- (C) thoracic inlet
- (D) tonsillar pillars
- (E) true vocal cords
Which of the following drugs has the shortest elimination half-life?
- (A) Diazepam
- (B) Flumazenil
- (C) Flumazepam
- (D) Lorazepam
- (E) Midazolam
While checking an anesthesia machine, opening the oxygen flow-control valve yields no oxygen flow, although the wall-mounted oxygen pipeline supply gauge reads 50 psig. Opening the backup oxygen cylinder results in normal oxygen flow. The most likely cause is
- (A) failure of the oxygen pipeline supply
- (B) failure of the second-stage oxygen pressure regulator
- (C) a malfunctioning check valve in the oxygen pipeline supply inlet
- (D) a malfunctioning fail-safe valve
- (E) a malfunctioning oxygen flow-control valve
Compared with morphine 5 mg administered epidurally at T12, morphine 5 mg administered intravenously is associated with
- (A) greater incidence of urinary retention
- (B) less intense analgesia
- (C) less nausea and vomiting
- (D) longer duration of analgesia
- (E) longer time to maximum analgesia
Two hours after coronary artery bypass grafting, a 60-year-old man has a heart rate of 140 bpm and blood pressure of 80/60 mmHg. Cardiac index is 1.5 L/min/m2. Central venous pressure is 23 mmHg with large a-waves in the right atrial pressure tracing. A pulsus paradoxus of 6 mmHg is noted. Which of the following is the most likely diagnosis?
- (A) Atrial flutter
- (B) Cardiac tamponade
- (C) Hypovolemia
- (D) Junctional tachycardia
- (E) Tension pneumothorax
To detect the delivery of hypoxic gas mixture, the optimal location for an oxygen analyzer in this circle is
- (A) 1
- (B) 2
- (C) 3
- (D) 4
- (E) 5
Which of the following processes is primarily responsible for the decrease in core body temperature that occurs during the first hour of general anesthesia?
- (A) Decreased production of heat
- (B) Convective heat loss caused by cutaneous vasodilation
- (C) Evaporative heat loss during skin preparation
- (D) Heat loss from the respiratory tract
- (E) Redistribution of core body heat to the periphery