During enflurane anesthesia for colectomy in a 75-year-old man with sepsis, urine output decreases to 10 ml/hr. Heart rate is 120 bpm, blood pressure is 100/50 mmHg, central venous pressure is 10 mmHg, and pulmonary artery occlusion pressure is 15 mmHg. The most appropriate management at this time is to
In a 45-year-old patient with severe mitral regurgitation, which of the following is the most important hemodynamic condition to avoid during induction of anesthesia?
(A) Decreased heart rate to less than 60 bpm
(B) Increased heart rate to greater than 90 bpm
(C) Increased preload
(D) Increased afterload
(E) Enhanced myocardial contractility
D
Awakening after a single dose of thiopental is caused by redistribution from the brain primarily to which of the following sites?