10 Random Questions


Following a vaginal hysterectomy in the lithotomy position under general anesthesia, a patient has numbness of the lateral aspect of the left calf and medial half of the dorsum of the left foot. On physical examination she has footdrop and the toes cannot be extended. Which nerve is most likely to be involved?

ADVANCED Regional & Pain

A 54-year-old man receives 25 ml of a 50% alcohol and 0.25% bupivacaine solution for celiac plexus block. During the next 20 minutes, blood pressure decreases from 130/75 mmHg to 85/55 mmHg. Which of the following is the most likely cause?

ADVANCED Regional & Pain

The short clinical duration of action of a single dose of fentanyl is a result of its

BASIC Pharmacology & Pharmacokinetics

During postoperative indirect laryngoscopy, the vocal cords appear symmetric during quiet breathing and approximate to the left of midline during phonation. The most likely cause is

ADVANCED Regional & Pain

A 55-year-old woman who is scheduled to undergo carotid endarterectomy has a history of essential hypertension and chronic obstructive pulmonary disease. Over a 30-minute period beginning one hour after induction of general anesthesia, Sp02 decreases from 99% to 95%. During that time, she has received fentanyl 100 mcg, isoflurane 1%, nitrous oxide 49.5%, oxygen 49.5%, and a nitroglycerin infusion to maintain blood pressure at approximately 160/95 mmHg. Which of the following is the most likely cause for the decline in oxygen saturation?

ADVANCED Respiratory & Critical Care

Each of the following statements concerning norepinephrine is true EXCEPT:

BASIC Pharmacology & Pharmacokinetics

A 50-year-old patient is undergoing craniotomy for clipping of a cerebral aneurysm with isoflurane, nitrous oxide, and fentanyl anesthesia. At the time of aneurysm exposure, the EEG shows burst suppression. Which of the following is the most likely cause?

ADVANCED Neuro

During axillary brachial plexus anesthesia, motor block frequently precedes sensory block because of

ADVANCED Regional & Pain

The trend plot shows end-tidal gases measured during a radical neck dissection. The event occurring at A is most likely

BASIC Equipment & Physics Respiratory & Critical Care General

A 45-year-old man with chronic liver failure is scheduled for liver transplantation. Which of the following preoperative findings is most likely?

ADVANCED General