Which of the following statements concerning the ventilatory effects of inhalational anesthesia is true?
(A) Assisted ventilation is not an effective technique to achieve normocarbia
(B) Surgical stimulation does not affect ventilation
(C) Combined doses of nitrous oxide and isoflurane depress ventilation the same as an equipotent dose of isoflurane alone
(D) The ventilatory response to increasing carbon dioxide concentration is normal
(E) The ventilatory response to hypoxemia is preserved
A
A 24-year-old woman requires anesthesia for emergency repair of open fractures of the tibia and fibula. She used cocaine two hours ago. Blood pressure is 170/110 mmHg. Each of the following is useful in managing the hypertension EXCEPT
Having received excessive intraoperative blood replacement, a patient anesthetized with fentanyl, diazepam, and nitrous oxide develops acute pulmonary edema. The drug most likely to have an immediate beneficial effect is
(A) nitroglycerin
(B) nitroprusside
(C) digoxin
(D) isoflurane
(E) mannitol
A
For any given FiO2 and PaCO2, the PaO2 is lower in a healthy paralyzed patient anesthetized with isoflurane than in the same patient unanesthetized and breathing spontaneously. The primary cause of this difference is
(A) controlled ventilation
(B) increased airway resistance
(C) inhibition of hypoxic pulmonary vasoconstriction
A 70-kg, 50-year-old man is scheduled for muscle flap closure of a decubitus ulcer over the sacrum. He has been quadriplegic at the level of C6-7 for six years. Which of the following is most likely to result from subarachnoid anesthesia with tetracaine 10 mg for this procedure?