During an aortic aneurysm repair, end-tidal carbon dioxide tension decreases from 35 to 20 mmHg in three breaths. The most likely cause is
(A) acute arteriovenous fistula
(B) bronchospasm
(C) decreased cardiac output
(D) increased tidal volume
(E) venous air embolism
C
To predict the requirement for isoflurane in milliliters of vapor per minute during closed circuit anesthesia, each of the following is necessary EXCEPT
In a healthy 70-kg adult, which of the following is the most likely effect of intravenous administration of morphine 10 mg on ventilatory responses?
(A) Increased response to hypoxia and decreased response to hypercarbia
(B) Decreased response to hypercarbia and no change in response to hypoxia
(C) Decreased response to both hypoxia and hypercarbia
(D) No change in response to hypercarbia and decreased response to hypoxia
(E) No change in response to hypoxia or hypercarbia
C
A 50-year-old man with alcoholism and jaundice is scheduled to undergo umbilical herniorrhaphy. An increase in which of the following best indicates impaired synthetic hepatic function?
You are called to a witnessed cardiac arrest where cardiopulmonary resuscitation is being performed. After successful intubation, arterial blood gas values are PaO2 86 mmHg, PaCO2 63 mmHg, and pH 7.25 at an FiO2 of 1.0. The most appropriate management at this time is to
(A) repeat arterial blood gas analysis using a new specimen
(B) administer sodium bicarbonate
(C) administer fluid challenge with 500 ml of normal saline solution