During laser microsurgery of the larynx, a rubber endotracheal tube wrapped with aluminum-foil tape starts to smolder and give off smoke. The first step is to
(A) suction the endotracheal tube
(B) add helium to the inspired gas mixture
(C) remove the endotracheal tube
(D) turn off the fresh gas flow
(E) pack a saline-soaked gauze sponge into the hypopharynx
C
The fetal heart rate and uterine contraction tracings shown are most consistent with
A patient with alcoholic cirrhosis, ascites, and gastrointestinal bleeding receives 4 units of red blood cells prior to anesthesia with isoflurane in oxygen for emergency exploratory laparotomy. After the peritoneum is opened and the fluid is drained, blood pressure decreases to 60/40 mmHg and SpO2 decreases to 90%. The most likely cause of the hypoxemia is
(A) acute myocardial ischemia
(B) decreased 2,3-diphosphoglycerate in transfused blood
During transurethral resection of the prostate under spinal anesthesia with a sensory level to T10, a patient has sudden onset of sharp upper abdominal pain and nausea. Arterial blood pressure increases from 120/80 to 150/90 mmHg; the patient becomes diaphoretic. Which of the following is the most likely diagnosis?