To predict the requirement for isoflurane in milliliters of vapor per minute during closed circuit anesthesia, each of the following is necessary EXCEPT
(A) causes more hemodynamic stimulation than an oropharyngeal airway
(B) is contraindicated in patients with cervical spine instability
(C) is more easily inserted when cricoid pressure is applied
(D) may serve as a temporary airway in case of a failed rapid sequence intubation
(E) requires administration of a muscle relaxant to avoid laryngospasm during insertion
D
A 70-year-old man sustains injuries to both carotid bodies during bilateral carotid endarterectomies performed four days apart. Two hours after the second procedure, the patient is breathing room air in the PACU. Which of the following sets (pH, pCO2, pO2) of arterial blood gas values is LEAST likely?
(A) 7.3 50 58
(B) 7.3 50 86
(C) 7.4 40 86
(D) 7.4 42 58
(E) 7.5 32 58
E
One week after sustaining third-degree burns over 40% of his body surface area, a patient requires general anesthesia for debridement and skin grafting. Which of the following responses to neuromuscular blockers is most likely?
(A) Clinically insignificant increases in serum potassium concentration after administration of succinylcholine 1 mg/kg
(B) Increased risk of hyperkalemia after administration of succinylcholine 1 mg/kg
(C) Increased sensitivity to vecuronium
(D) Laudanosine toxicity after administration of atracurium 0.4 mg/kg
(E) Normal serum potassium concentration if administration of succinylcholine is preceded by d-tubocurarine 3 mg
A patient is undergoing exploration of a stab wound to the left side of the neck. On awake laryngoscopy, the left vocal cord is in midposition and the right vocal cord is abducted during inspiration. The most likely cause of these findings is trauma to which of the following structures on the left?
Two days after total abdominal hysterectomy, a 54-year-old woman develops lethargy followed by seizures and coma. Laboratory studies show a serum sodium concentration of 108 mEq/L and serum osmolality of 225 mOsm/kg. The most appropriate next step in management is administration of which of the following?