10 Random Questions
A 72-year-old man has had residual hemiparesis since having a cerebrovascular accident three years ago. Compared with the response of the unaffected limbs to nondepolarizing muscle relaxants, the hemiparetic limbs will show
- (A) the same response
- (B) greater depression of tetanus
- (C) greater twitch depression
- (D) less twitch depression
- (E) less post-tetanic facilitation
Following blunt trauma to the chest, a patient has tachycardia, hypotension, and markedly distended neck veins. Each of the following is expected EXCEPT
- (A) cardiac output of 2.1 L/min
- (B) mixed venous oxygen saturation of 75%
- (C) pulmonary artery occlusion pressure of 25 mmHg
- (D) pulmonary artery diastolic pressure of 25 mmHg
- (E) right atrial pressure of 25 mmHg
The preanesthetic ECG trace (lead II) shown from a 32-year-old woman suggests
- (A) potential for tachyarrhythmia
- (B) need for preanesthetic atropine
- (C) myocardial ischemia
- (D) left bundle branch block
- (E) right ventricular hypertrophy
Which of the following nerves is most likely to be injured by a fracture of the shaft of the humerus?
- (A) Axillary
- (B) Median
- (C) Musculocutaneous
- (D) Radial
- (E) Ulnar
During active labor, 10 ml of bupivacaine 0.5% with epinephrine 1:200,000 is administered epidurally. Fifteen minutes later, maternal blood pressure is 70/50 mmHg and heart rate is 70 bpm; fetal heart rate is 90 bpm for 45 seconds, with loss of beat-to-beat variability. The most likely explanation for the fetal vital signs is
- (A) fetal bupivacaine cardiotoxicity
- (B) maternal bupivacaine cardiotoxicity
- (C) maternal hypotension
- (D) uterine artery vasoconstriction
- (E) umbilical cord compression
The Bain circuit
- (A) provides nearly identical delivered and inspired anesthetic concentrations
- (B) has the fresh gas flow inlet near the reservoir bag
- (C) is a nonrebreathing circuit at any fresh gas flow rate
- (D) is most efficient during spontaneous ventilation
- (E) has a time constant greater than 1 minute for change in inspired anesthetic concentrations
The increased resistance of severely burned patients to pancuronium is primarily due to
- (A) enhanced urinary excretion of pancuronium
- (B) decreased number of presynaptic cholinergic receptors
- (C) increased number of postsynaptic cholinergic receptors
- (D) increased rate of metabolism of pancuronium
- (E) increased volume of distribution of pancuronium
A child undergoing general anesthesia is breathing spontaneously using the Jackson-Rees modification of the Ayres T-piece. Respiratory rate is 20/min and tidal volume is 75 ml. What is the minimum fresh gas flow required to prevent rebreathing?
- (A) 750 ml/min
- (B) 1500 ml/min
- (C) 2250 ml/min
- (D) 4500 ml/min
- (E) 6000 ml/min
The most important anesthetic consideration in Pierre Robin syndrome is
- (A) anterior tilt of the larynx
- (B) hyperplasia of the internal surface of the maxilla
- (C) mandibular hypoplasia
- (D) hypertrophy of the epiglottis
- (E) tracheomalacia
The left ventricular function curve is from a young, healthy patient. If X represents the patient's myocardial function prior to anesthesia, the effect of 1 MAC of isoflurane at normocarbia is best represented by which of the following positions?
- (A) A
- (B) B
- (C) C
- (D) D
- (E) E