10 Random Questions
A patient who is paraplegic secondary to spinal cord transection at T3 develops bradycardia and facial flushing during a nephrectomy under general anesthesia with nitrous oxide, fentanyl, and atracurium. The most likely cause of this response is
- (A) release of histamine
- (B) stimulation of the carotid sinus
- (C) release of prostaglandins
- (D) vagal response to peritoneal traction
- (E) release of epinephrine
Compared with dopamine, dobutamine
- (A) is more useful in patients taking monoamine oxidase inhibitors because it depends on the release of norepinephrine for its effect
- (B) is more useful in patients in right heart failure because it does not increase pulmonary vascular resistance
- (C) has no positive chronotropic response
- (D) induces diuresis without increasing cardiac output
- (E) in doses greater than 10 mcg/kg/min increases systemic vascular resistance more than similar doses of dopamine
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
Myofascial pain is an example of
- (A) a central pain state
- (B) neuropathic pain
- (C) psychogenic pain
- (D) somatic pain
- (E) visceral pain
Peak airway pressure increases from 25 to 50 cmH2O when beginning right endobronchial ventilation with a right double-lumen tube. The most likely explanation for this increase is
- (A) failure to decrease tidal volume
- (B) inadvertent intubation of the left mainstem bronchus
- (C) intrinsic resistance of small endobronchial lumina
- (D) obstruction of the orifice of the right upper lobe
- (E) overinflation of the bronchial tube cuff
A patient with uremia is scheduled for emergency surgery. Bleeding time is 18 minutes. The most appropriate initial treatment is
- (A) cryoprecipitate
- (B) desmopressin
- (C) fresh frozen plasma
- (D) platelets
- (E) vitamin K
In a patient with hypovolemic shock, which of the following factors is the best measure of the overall balance between oxygen supply and demand?
- (A) Arterial oxygen content
- (B) PetO2
- (C) Mixed venous oxygen saturation
- (D) PaO2
- (E) Transcutaneous oxygen tension
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
To detect the delivery of a hypoxic gas mixture, the optimal location for an oxygen analyzer in this circle is
- (A) 1
- (B) 2
- (C) 3
- (D) 4
- (E) 5
Which of the following is the most appropriate action after an anesthetic vaporizer is tipped?
- (A) Return to the manufacturer for recalibration
- (B) Flush the vaporizer with oxygen at 5 L/min for 24 hours
- (C) Store the vaporizer for 24 hours at room temperature
- (D) Set the vaporizer at low concentration and flush with oxygen at 10 L/min for 30 minutes
- (E) Verify the vaporizer output with mass spectrography