10 Random Questions
In performing a diagnostic left lumbar sympathetic block for lower extremity claudication, the tip of the needle ideally should lie at point
- (A) A
- (B) B
- (C) C
- (D) D
- (E) E
After termination of cardiopulmonary bypass, a patient who is chronically digitalized receives digoxin 0.5 mg in error. An ECG shows sinus bradycardia with intermittent sinus arrest; blood pressure is 90/60 mmHg. Which of the following drugs is contraiindicated in this patient?
- (A) Atropine
- (B) Calcium chloride
- (C) Ephedrine
- (D) Magnesium sulfate
- (E) Phenylephrine
Compared with adults, caudal anesthesia in children is associated with
- (A) higher risk for subarachnoid puncture
- (B) more severe hypotension
- (C) more rapid onset of sensory block
- (D) smaller volume of anesthetic per kilogram of body weight
- (E) toxic effects at lower serum levels of bupivacaine
One day after a vaginal hysterectomy under epidural anesthesia, a patient has numbness and inability to dorsiflex the right foot. Her legs were placed in leg holders during the operation. The most likely cause is
- (A) epidural hematoma
- (B) common peroneal nerve injury
- (C) sacral nerve root injury
- (D) sacral plexus injury
- (E) sciatic nerve injury
A 78-year-old man who is scheduled for an inguinal hernia repair has a preoperative ECG showing left bundle branch block. He has had no symptoms of cardiovascular disease. This ECG finding most likely indicates
- (A) cardiac disease
- (B) the need for spinal anesthesia
- (C) an electrolyte disturbance
- (D) the need for insertion of a temporary pacemaker
- (E) a normal finding in a patient of this age
Following antagonism of a nondepolarizing muscle relaxant with neostigmine, twitch height is normal. To achieve this effect, the percentage of the acetylcholine receptor pool that must be free of muscle relaxant is
- (A) 10
- (B) 25
- (C) 33
- (D) 50
- (E) 75
Which of the following phenomena is primarily responsible for the decrease in core body temperature that commonly occurs during the first hour of general anesthesia?
- (A) Convective heat loss from cutaneous vasodilation
- (B) Decreased heat production
- (C) Evaporative heat loss during skin preparation
- (D) Heat loss from the respiratory tract
- (E) Redistribution of core body heat to the periphery
The newborn infant of an 18-year-old heroin addict has an initial Apgar score of 1. After intubation of the trachea and ventilation with pure oxygen, the Apgar score is 3 at five minutes. Appropriate management at this time would include administration of each of the following EXCEPT
- (A) dextrose 10%
- (B) epinephrine
- (C) naloxone
- (D) normal saline solution
- (E) sodium bicarbonate
Which of the following is the most likely sequela of interscalene brachial plexus block?
- (A) Cervical epidural block
- (B) Hemidiaphragmatic paralysis
- (C) Pneumothorax
- (D) Seizure
- (E) Vocal cord paralysis
The correlation between anesthetic potency and lipid solubility
- (A) suggests that the number of molecules dissolved at the site of action causes anesthesia
- (B) applies to anesthetic agents dissolved in olive oil
- (C) suggests that the type of molecule causes anesthesia
- (D) is consistent with the synergistic effect of anesthetics
- (E) is not consistent with a unitary molecular site of action of anesthetics