Which of the following differentiates midazolam from diazepam administered intravenously in equipotent doses?
(A) Greater hemodynamic stability
(B) Lack of active metabolites
(C) Less respiratory depression
(D) Longer duration of action
(E) More rapid onset
B
Cholinergic receptor blockade
(A) decreases intraocular pressure
(B) decreases lower esophageal sphincter tone
(C) increases gastrointestinal motility
(D) induces diaphoresis
(E) produces copious secretions
B
A 54-year-old man is scheduled for open reduction of a fracture sustained when he jumped from a burning building. The carboxyhemoglobin concentration is 25%. Which of the following is the most reliable indicator of adequate oxygenation during general anesthesia?
(A) PaO2 of 300 mmHg
(B) pH of 7.38 with a PaCO2 of 41 mmHg
(C) Mixed venous PO2 of 45 mmHg
(D) Oxyhemoglobin saturation of 100% measured by co-oximeter
An apneic adult is receiving an oxygen flow of 4 L/min through a rigid bronchoscope. After five minutes of apnea, which of the following findings is most likely?
An isoflurane-specific vaporizer that is 25% full is mistakenly refilled with halothane, and the dial is set at 1.5%. Which of the following statements concerning this situation is true?
(A) The gas mixture will contain equal partial pressures of halothane and isoflurane
(B) The gas mixture will produce a greater depth of anesthesia than 1.5% isoflurane alone
(C) The gas mixture will produce a greater depth of anesthesia than 1.5% halothane alone
(D) The liquid mixture will have a higher vapor pressure than 1.5% halothane alone
(E) The liquid mixture will have a higher vapor pressure if it is placed in a halothane-specific vaporizer
A patient who had liver transplantation two years ago now requires general anesthesia for ENT surgery. Minimal rejection has occurred on a regimen of cyclosporine and prednisone. Which of the following is most likely?