After inflation of both the tracheal and endobronchial cuffs of a left-sided double-lumen tube, the following are noted on auscultation of the chest: Left lumen clamped --> Breath sounds absent bilaterally; Right lumen clamped --> Breath sounds present on left only; Both lumens open --> Breath sounds present on left only. The most appropriate action is to
(A) decrease the endobronchial cuff volume
(B) decrease the tracheal cuff volume
(C) reinsert the tube, rotating it 180 degrees to the right
(D) suction both lumens
(E) withdraw the tube slightly and repeat the auscultory maneuvers
Compared with a patient who is breathing spontaneously, a patient in the supine position receiving controlled positive-pressure ventilation will most likely have which of the following findings?
A 55-year-old woman receiving chronic dialysis for renal failure comes to the emergency department with a perforated viscus. She has chest pain. Heart rate is 124 bpm, blood pressure is 90/60 mmHg, and respiratory rate is 18/min. Surgery is to be performed within the hour. Which of the following best describes this patient's ASA physical status classification?
(A) III
(B) III E
(C) IV
(D) IV E
(E) V E
D
Which of the following processes is primarily responsible for the decrease in core body temperature that occurs during the first hour of general anesthesia?
(A) Decreased production of heat
(B) Convective heat loss caused by cutaneous vasodilation
(C) Evaporative heat loss during skin preparation
(D) Heat loss from the respiratory tract
(E) Redistribution of core body heat to the periphery