10 Random Questions
When succinylcholine is administered intravenously to infants, intragastric pressure
- (A) is usually unchanged
- (B) increases to a peak of 30 cmH20 within two minutes
- (C) increases because of abdominal muscle fasciculations
- (D) increases because of an acetylcholine-like effect on the vagus nerve
- (E) peaks and subsides within five minutes
The most sensitive means of detecting venous air embolism is
- (A) precordial Doppler stethoscope
- (B) transesophageal echocardiography
- (C) end-tidal carbon dioxide measurement
- (D) pulmonary artery pressure measurement
- (E) central venous pressure measurement
A patient develops urticaria and pruritus while receiving a blood transfusion in the PACU. Blood pressure and heart rate are unchanged from pretransfusion values. The most appropriate action is administration of
- (A) diphenhydramine
- (B) epinephrine
- (C) furosemide
- (D) hydrocortisone
- (E) mannitol
A 40-year-old woman with chronic renal failure is undergoing revision of an arteriovenous shunt with general anesthesia. The capnographic waveform was obtained during spontaneous ventilation 20 minutes after administration of succinylcholine and tracheal intubation. Which of the following is the most likely cause of these findings?
- (A) Leaking endotracheal cuff
- (B) Channeling of soda lime
- (C) Light anesthesia
- (D) Metabolic acidosis
- (E) Residual neuromuscular block
Which of the following statements concerning the choice of nitroprusside or nitroglycerin to induce deliberate hypotension is true?
- (A) Nitroglycerin is more potent
- (B) Nitroglycerin produces hypotension by acting on both arterial and venous capacitance vessels
- (C) Nitroprusside produces less rebound hypertension on discontinuation
- (D) The toxic effects of nitroprusside are independent of dose
- (E) The therapeutic effects of nitroprusside may persist on discontinuation
Compared with isoflurane, desflurane
- (A) causes higher plasma norepinephrine levels
- (B) has greater biodegradability
- (C) has a higher blood/gas partition coefficient
- (D) has a lower MAC value
- (E) has a lower vapor pressure
Which of the following is more likely to occur with use of trimethaphan to induce hypotension than with use of nitroprusside?
- (A) A predictable decrease in mean arterial pressure
- (B) Increased mixed venous P02
- (C) Increased serum lactate concentration
- (D) Mydriasis
- (E) Reflex tachycardia
Unilateral or bilateral diaphragmatic paralysis is a complication of each of the following EXCEPT
- (A) surgical ligation of a patent ductus arteriosus
- (B) use of pericardial ice-slush for topical cardiac hypothermia
- (C) stellate ganglion block
- (D) interscalene brachial plexus block
- (E) C6 cervical fracture-dislocation
A patient with end-stage renal disease has prolonged ventilatory depression after administration of morphine. The most likely cause is increased
- (A) serum concentration of morphine-6-glucuronide
- (B) elimination half-life of morphine
- (C) opioid receptors
- (D) receptor affinity
- (E) volume of distribution
Maternal hyperventilation produces
- (A) decreased maternal arterial pH
- (B) increased fetal cerebral blood flow
- (C) increased fetal arterial pH
- (D) decreased maternal uterine artery flow
- (E) increased fetal arterial P02