The best indication that a patient is ready for discharge from an outpatient facility after spinal anesthesia is return of
(A) pinprick sensation to the S4-5 dermatome
(B) micturition
(C) plantar flexion
(D) proprioception of the big toe
(E) knee extension
B
Forty-eight hours after thoracotomy, a patient's T6-7 epidural catheter is removed and the distal 2 cm is noted to be missing. The patient felt no pain during removal and neurologic examination shows no abnormalities. After informing the patient, which of the following is the most appropriate next step in management?
The EEG of a patient undergoing anesthesia with high-dose fentanyl would most likely show
(A) the same pattern seen with enflurane 0.5 MAC
(B) cessation of low-frequency activity
(C) accentuation of high-frequency activity
(D) uniform depression of all frequencies
(E) low-frequency, high-amplitude activity
E
A 62-year-old woman with polycythemia vera is scheduled to undergo total knee arthroplasty using a tourniquet. Preoperative hematocrit is 60%. Which of the following is the most appropriate action?
(A) Perform total knee arthroplasty without use of a tourniquet
(B) Preoperative reduction of the hematocrit to 45% to 50%
(C) Prophylactic administration of aprotonin during surgery
(D) Prophylactic administration of epsilon-aminocaproic acid during surgery
(E) Prophylactic administration of low-dose heparin during surgery
B
Massive venous air embolism occurs in a patient who is undergoing craniotomy in the sitting position with nitrous oxide, oxygen, fentanyl anesthesia. Which of the following changes in end-tidal (ET) concentrations of carbon dioxide, nitrogen, and nitrous oxide are most likely in this patient? (ETCO2, ETN2, ETN2O)
Which of the following drugs used to produce or reverse muscle relaxation has the greatest prolongation of action in a patient with end-stage renal disease?
(A) Atracurium
(B) Neostigmine
(C) Pancuronium
(D) Succinylcholine
(E) Vecuronium
B
Each of the following findings is characteristic of chronic reflex sympathetic dystrophy of the extremities EXCEPT
(A) allodynia
(B) bone demineralization
(C) edema
(D) hyperpathia
(E) warm skin
E
During prolonged labor, a fetal scalp blood sample shows a PO2 of 21 mmHg, a PCO2 of 46 mmHg, and a pH of 7.35. These findings suggest