A patient is scheduled for amputation of the third metatarsal. A tourniquet will not be used during the procedure. The most effective anesthesia will be provided by block of which of the following nerves?
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
A 72-year-old man has ST-segment depression of 2 mm in ECG lead II immediately after suprarenal aortic clamping. Which of the following is the most likely cause?
(A) Decreased left ventricular stroke volume
(B) Decreased venous return
(C) Increased left ventricular wall tension
(D) Reflex tachycardia
(E) Release of epinephrine from hypoperfused adrenal medulla
C
Which of the following drugs administered to a parturient eliminates fetal heart rate variability?
A full-term neonate has physical findings suggestive of congenital diaphragmatic hernia. Initial Apgar score is 2. Which of the following is the most appropriate initial management?
(A) Placement of an orogastric tube
(B) Insertion of a chest tube
(C) Controlled ventilation by face mask
(D) Controlled ventilation through an endotracheal tube
(E) Spontaneous ventilation through an endotracheal tube
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?
(A) Administration of atropine
(B) Administration of calcium chloride
(C) Administration of sodium bicarbonate
(D) Transcutaneous pacing
(E) DC countershock at 200 joules
B
Hemodilution is used during profound hypothermic cardiopulmonary bypass primarily because it
(A) decreases cold-induced coagulopathy
(B) decreases edema formation
(C) increases oxygen-carrying capacity of plasma
(D) increases oxygen dissociation from hemoglobin
(E) limits the cold-induced increase in blood viscosity