In a patient who is receiving nitroglycerin intravenously after a coronary artery operation, peripheral oxygen saturation is 85% and PaO2 is 200 mmHg. The most appropriate management is administration of
During carotid endarterectomy, blood pressure suddenly decreases from 140/90 to 80/50 mmHg. The EKG shows a heart rate of 42 bpm, with normal sinus rhythm and occasional premature ventricular contractions. The most appropriate therapy is intravenous administration of
(A) atropine
(B) epinephrine
(C) isoproterenol
(D) lidocaine
(E) phenylephrine
A
In patients with pregnancy-induced hypertension, magnesium sulfate is most likely to
A 33-year-old primigravid woman with myasthenia gravis, well-controlled with pyridostigmine, is in labor with the cervix dilated 7 cm. She has a headache and feels very nervous. Blood pressure is 160/115 mmHg, she has 3+ pitting edema, and urinalysis shows 4+ protein. Appropriate management of her labor should include
(A) lumbar epidural block with bupivacaine 8 ml of 0.5% solution
A newly developed inhalational anesthetic has a blood-gas partition coefficient of 0.2. Which of the following statements best describes this drug compared with isoflurane?
(A) MAC is lower
(B) The difference between Fa and Fl during maintenance of anesthesia is greater
(C) Time to emergence is shorter
(D) Rapid induction requires greater overpressure
(E) Equilibrium in a circle system with the same flow of fresh gas is slower
A 34-year-old man has hyperkalemia-induced asystole. After initiating cardiopulmonary resuscitation, which of the following is the most appropriate next step in management?