A woman has weakness of the right quadriceps and a decreased knee jerk reflex on the right one day after forceps delivery under epidural anesthesia. The most likely cause is
(A) epidural hematoma
(B) intrapelvic nerve trauma
(C) lithotomy positioning
(D) reaction to the preservative in the anesthetic solution
If the low-pressure alarm of an anesthesia circuit is broken, which of the following monitors will provide the earliest indication of a disconnected ventilator hose?
(B) is caused by direct suppression of platelet production
(C) is immunologically mediated
(D) is diagnosed by peripheral blood smear
(E) occurs only with larger intravenous doses of heparin
C
Immediately after sustaining severe head injury, a 20-year-old man has a blood pressure of 150/90 mmHg and an intracranial pressure of 35 mmHg. After one hour of thiopental infusion, blood pressure is 105/60 mmHg, intracranial pres sure is 20 mmHg, central venous pressure is 5 mmHg, and temperature is 36°C. The EEG shows slow-wave activity. The most appropriate next step is administration of
A patient develops jaundice one week after undergoing laparoscopic cholecystectomy during halothane anesthesia. Laboratory studies show an increased serum alkaline phosphatase concentration, a mildly increased serum aspartate aminotransferase concentration, and a markedly increased conjugated bilirubin fraction. Which of the following is the most likely diagnosis?
During emergency laparotomy, a patient who has been taking a monoamine oxidase inhibitor for six months develops hypotension despite adequate fluid therapy. The most appropriate management is administration of
(A) amrinone
(B) ephedrine
(C) epinephrine
(D) isoproterenol
(E) phenylephrine
E
The Mapleson A system (Magill circuit) illustrated
(A) is functionally equivalent to the Bain circuit
(B) prevents rebreathing more effectively during controlled ventilation than during spontaneous ventilation
(C) provides better humidification than the Mapleson D system
(D) requires a fresh gas flow equal to minute ventilation to prevent rebreathing during spontaneous ventilation
(E) results in less rebreathing during controlled ventilation than the Mapleson C system