2
6. An adult patient with mild hypothermia is anesthetized with 1 MAC of isoflurane. Which of the
following physiologic mechanisms is MOST effective for maintaining body temperature in this
patient?
A. Nonshivering thermogenesis
B. Shivering thermogenesis
C. Vasoconstriction
7. A 72-year-old man has just received midazolam for an endoscopic procedure of the upper
gastrointestinal tract. Sedation is easily antagonized by flumazenil. Although the endoscopist
asks to send the patient home in 1 hour, which of the following factors BEST explains why this
patient should remain hospitalized for observation?
A. Flumazenil has low affinity for benzodiazepine receptors
B. Flumazenil has moderate intrinsic agonist activity
C. Midazolam has a longer duration of action than flumazenil
8. Which of the following factors exerts the GREATEST effect on the extent of spread of local
anesthetic following subarachnoid block with hyperbaric bupivacaine?
A. Added epinephrine
B. Patient position
C. Total dose of drug
9. A 17-year-old boy develops pulmonary edema after resolution of postoperative laryngospasm.
While breathing 100% O
2
, SpO
2
is 80%. Which of the following strategies is the MOST
appropriate management?
A. Administration of albuterol
B. Administration of furosemide
C. Positive-pressure ventilation
10. A 61-year-old man receives a spinal anesthetic for transurethral resection of the prostate
(TURP). Forty-five minutes after the start of the procedure, he suddenly develops nausea,
diaphoresis, and sharp pain in the left shoulder. Which of the following etiologies is the MOST
likely cause?
A. Angina pectoris
B. Bladder perforation
C. Inadequate spinal sensory level
11. A 36-year-old woman is receiving general anesthesia for a diagnostic laparoscopy in the
Trendelenburg position with CO
2
insufflation. During a 15-minute period after induction, her
SpO
2
decreases from 99% to 90% and the partial pressure of ETCO
2
increases from 38 to 43