During postoperative indirect laryngoscopy, the vocal cords appear symmetric during quiet breathing and approximate to the left of midline during phonation. The most likely cause is
(A) pure abductor paralysis of the left cord
(B) pure abductor paralysis of the right cord
(C) abductor and adductor paralysis of the left cord
(D) abductor and adductor paralysis of the right cord
During insufflation of the peritoneal cavity with carbon dioxide at the start of laparoscopy, heart rate increases to 140 bpm, blood pressure decreases to 70/40 mmHg, and a loud murmur is heard through the esophageal stethoscope. The most appropriate immediate step is to
Which of the following combinations of hemoglobin, blood gases, and cardiac output provides the greatest delivery of oxygen to tissue? (Hb, PaO2, SaO2, CO)
Which of the following is most likely to be effective in the treatment of clinically evident cerebral vasospasm occurring after subarachnoid hemorrhage?
A 62-year-old patient who is undergoing femoral-popliteal arterial bypass grafting during general anesthesia develops supraventricular tachycardia. Heart rate is 165 bpm and blood pressure is 90/50 mmHg. Which of the following is the LEAST appropriate treatment of the tachycardia?
(A) Adenosine
(B) Esmolol
(C) Phenylephrine
(D) Procainamide
(E) Verapamil
D
Each of the following increases arterial to end-tidal carbon dioxide tension difference EXCEPT