In a patient with asthma, which of the following drugs used to treat supraventricular tachycardia is LEAST likely to induce bronchospasm?
(A) Adenosine
(B) Edrophonium
(C) Esmolol
(D) Propranolol
(E) Verapamil
E
An arterial blood sample is obtained from a patient undergoing hypothermic cardiopulmonary bypass at 28 C. Analysis at 37 C shows a pH of 7.40 and PaCO2 of 40 mmHg. Which of the following values are most likely if the analysis is corrected to 28 C?
Following the administration of 4 MAC hours of enflurane, peak serum concentrations of inorganic fluoride are highest in patients who
(A) are physically dependent on barbiturates
(B) are taking isoniazid chronically to suppress tuberculosis
(C) are epileptics taking phenytoin chronically
(D) are obese
(E) consume alcohol regularly
B
During halothane anesthesia with spontaneous ventilation, the most reliable sign of malignant hyperthermia is
(A) hypertension
(B) increased temperature
(C) increased minute ventilation
(D) muscle rigidity
(E) tachycardia
C
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
Following a right lower lobectomy, a patient develops a bronchopleural fistula and becomes hypoxic. He is orally intubated and mechanically ventilated with pure oxygen. PaO2 is 65 mmHg, PaCO2 is 70 mmHg, and pH is 7.25. Which of the following will produce the most favorable change in the blood gases?