A 50-year-old woman has episodes of electric-shock-like pain of one minute in duration affecting the right side of the face. In between episodes of this pain, she is relatively pain free. Which of the following is the most appropriate management?
(A) Beta-adrenergic blockers
(B) Carbamazepine
(C) Infrared heat therapy
(D) Nonsteroidal anti-inflammatory drugs
(E) Stellate ganglion block
B
A healthy patient is receiving general endotracheal anesthesia with nitrous oxide 4 L/min, oxygen 2 L/min, and isoflurane 1% with spontaneous ventilation. The inspiratory breathing hose becomes disconnected from the inspiratory valve. The earliest alarm will be produced by
(A) a pulse oximeter with finger probe set to alarm at 60% saturation
(B) a mass spectrometer set to alarm when no breath is detected for 30 seconds
(C) an oxygen analyzer mounted on the inspiratory valve outlet and set to alarm at 25% oxygen concentration
(D) a capnograph sensor at the Y-piece that alarms when end-tidal carbon dioxide tension is greater than 60
A 57-year-old man has back pain, a heart rate of 90 bpm, decreased pulse in the left arm, and blood pressure of 200/110 mmHg. During infusion of nitroprusside, heart rate increases to 115 bpm and blood pressure decreases to 140/80 mmHg. The most appropriate management at this time is administration of
Following completion of an ankle block, the patient reports intact sensation on the tips of the toes. Which of the following nerves was blocked inadequately?
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
Which of the following statements concerning propofol is true?
(A) Active metabolites can produce residual postoperative sedation
(B) It causes less cardiovascular depression than an equivalent induction dose of thiopental
(c) It causes less respiratory depression than an equivalent induction dose of thiopental
(D) It has analgesic properties
(E) The vehicle emulsion is associated with hypersensitivity reactions