The most important factor regulating blood flow to ischemic cerebral tissue is
Which of the following inhalational anesthetics best relieves left ventricular outflow obstruction in a patient with hypertrophic obstructive cardiomyopathy (IHSS)?
Three hours after undergoing coronary artery bypass grafting, an elderly man develops severe hypotension after intravenous administration of morphine 4 mg. Pulmonary artery occlusion pressure is 27 mmHg and central venous pressure is 30 mmHg. Transesophageal echocardiography shows decreased end-diastolic ventricular volumes. Which of the following is the most likely diagnosis?
A 2.8-kg newborn undergoes repair of a moderate-sized omphalocele. Intravenous fluid is administered at 14 mL/hr. Forty-five minutes after beginning surgery and before reduction of the omphalocele, arterial blood pressure decreases from 80/40 to 55/30 mmHg. SaO2 is 98% at an FiO2 of 0.5. Breath sounds are equal bilaterally. Which of the following is the most likely explanation for the decrease in blood pressure?
Which of the following procedures is most specific for diagnosing reflex sympathetic dystrophy in a patient with pain of the lower extremity?
A 50-year-old woman has episodes of electric-shock-like pain of one minute in duration affecting the right side of the face. In between episodes of this pain, she is relatively pain free. Which of the following is the most appropriate management?
Which of the following statements concerning the effects of glycopyrrolate is true?
Four and one-half hours after initiation of general anesthesia for a radical hysterectomy, a 65-kg patient has a heart rate of 90 bpm, blood pressure of 100/70 mmHg, pulmonary artery occlusion pressure of 9 mmHg, and cardiac output of 2.8 L/min. Urine output has been 20 ml over the last two hours. The most appropriate next step is
In a 45-year-old patient with severe mitral regurgitation, which of the following is the most important hemodynamic condition to avoid during induction of anesthesia?
A moderately obese 38-year-old woman is using patient-controlled morphine analgesia one day after open cholecystectomy. While breathing room air, oxygen saturation is 85%, Pa02 is 48 mmHg, PaC02 is 42 mmHg, and pH is 7.36. In addition to administration of oxygen, the most effective management is to