The potency of an inhalational anesthetic correlates best with its
(A) vapor pressure
(B) blood/gas partition coefficient
(C) molar volume
(D) brain/gas partition coefficient
(E) oil/gas partition coefficient
E
An obese patient and a lean patient receive halothane for the same duration and at the same inspired tension. Postoperatively, the obese patient would demonstrate
An obese, 70-year-old woman with a long history of tobacco abuse is awake and semirecumbent after uneventful anesthesia with isoflurane for a ventral hernia repair. During the first hour in the recovery room while breathing 50% oxygen by face mask, her arterial oxygen saturation decreases to 90% while other vital signs remain satisfactory. Which of the following is most likely to be effective in the management of this situation?
A 26-year-old man is in the ICU one hour after sustaining a displaced cervical fracture at the level of C7-8 in a diving accident. Each of the following findings is consistent with this patient's injury EXCEPT
(A) bilateral paralysis of the vocal cord adductors
(B) gastric dilatation
(C) hypotension without tachycardia
(D) inward movement of the chest with inspiration
(E) normal tidal volume
A
Which of the following statements concerning the superior laryngeal nerve is true?
(A) It provides sensory innervation to the subglottic surface of the vocal cord
(B) It provides sensory innervation to the inferior surface of the epiglottis
(C) It is a branch of the glossopharyngeal nerve
(D) It is blocked by injection of anesthetic near the lateral portion of the cricothyroid membrane
(E) It is the most commonly injured nerve during thyroid surgery
A 62-year-old patient undergoes resection of a descending thoracic aneurysm under anesthesia with morphine, nitrous oxide, oxygen, and pancuronium. In spite of normal somatosensory evoked potentials (SSEP) during the procedure, the patient has paraplegia postoperatively. The factor most likely responsible for failure to note the deficit intraoperatively is
(A) the effect of nitrous oxide on SSEP
(B) the effect of morphine on SSEP
(C) failure to test motor pathways
(D) hyperventilation to a PaC02 of 30 mmHg
(E) unintentional hypothermia to 34°C
C
A previously healthy 26-year-old man sustains massive soft tissue injury in a motor vehicle accident. He appears to be well for 48 hours after initial resuscitation, then develops marked tachypnea. Arterial blood gas analysis would be most likely to show which of the following values? (pH, PaCO2, PaO2, FiO2)
(A) 7.53 60 75 .21
(B) 7.12 25 110 .30
(C) 7.09 60 90 .40
(D) 7.53 25 55 .80
(E) 7.28 40 195 .80
D
A 25-year-old woman is admitted to the hospital in the early stages of labor at term. Initial hematocrit is 33%. Which of the following is the most likely cause of the hematocrit value?