A 67-year-old man undergoes spinal anesthesia with hyperbaric tetracaine 10 mg for transurethral resection of the prostate. At the end of the 50-minute procedure, the level of anesthesia is T6 and blood pressure is 120/70 mmHg. Within two minutes after transfer to a stretcher, the patient has nausea and blood pressure decreases to 76/42 mmHg. Which of the following is the most likely cause of the acute hypotension?
In a 65-year-old man, which of the following findings on preoperative pulmonary function testing is associated with the highest risk for respiratory insufficiency following pneumonectomy?
(A) Maximum voluntary ventilation at 65% of predicted
(B) Mean pulmonary artery pressure of 28 mmHg
(C) Predicted postoperative forced expiratory volume in one second (FEV1) of 800 ml
(D) Residual volume to total lung capacity (RV/TLC) ratio of 0.35
An EKG shows ventricular tachycardia in a patient with a heart rate of 160 bpm and a blood pressure of 90/60 mmHg. The best initial therapeutic maneuver prior to cardioversion is
A woman has weakness of the right quadriceps and a decreased knee jerk reflex on the right one day after forceps delivery under epidural anesthesia. The most likely cause is
(A) epidural hematoma
(B) intrapelvic nerve trauma
(C) lithotomy positioning
(D) reaction to the preservative in the anesthetic solution
An acutely ill 65-year-old man with sepsis has severe hypophosphatemia. Which of the following is most likely to result from this electrolyte disorder?
Which of the following should be included in the preoperative management of a 12-year-old patient with Duchenne muscular dystrophy who is unable to ambulate?
(A) Determination of serum creatine kinase concentration
(B) Determination of serum potassium concentration