Which of the following increases blood flow to the lower lobe of the right lung?
(A) Collapsing the right lung during anesthesia
(B) The expiratory phase of spontaneous ventilation
(C) The inspiratory phase of mechanical ventilation
(D) Moving from the supine to the upright position
(E) Moving from the supine to the left lateral decubitus position
C
A jaundiced patient requires general anesthesia for portocaval shunt. He has a long history of alcohol abuse and is cirrhotic with ascites. Special considerations relevant to induction of anesthesia for this patient include each of the following EXCEPT:
(A) Denitrogenation by mask may be more rapid than expected
(B) The risk of aspiration is increased
(C) The dose of thiopental necessary for induction will be predictably reduced
(D) The duration of succinylcholine action may be prolonged
(E) Alfentanil would be an appropriate supplement
C
During induction of anesthesia in a 70-year-old man with aortic stenosis, the blood pressure decreases from 140/ 80 to 70/45 mmHg as the cardiac rhythm changes from normal sinus at 70 bpm to junctional at 120 bpm. The most appropriate initial therapy would be
A 72-year-old man has had residual hemiparesis since having a cerebrovascular accident three years ago. Compared with the response of the unaffected limbs to nondepolarizing muscle relaxants, the hemiparetic limbs will show
(A) the same response
(B) greater depression of tetanus
(C) greater twitch depression
(D) less twitch depression
(E) less post-tetanic facilitation
D
Which of the following increases during infusion of epinephrine?