A 32-year-old patient with end-stage renal failure has irreversible neuromuscular blockade two hours after tracheal intubation with a muscle relaxant. Which of the following is the most likely cause?
A woman is in labor at 40 weeks' gestation and the fetus is in breech presentation. Which of the following will provide adequate uterine relaxation for vaginal delivery?
A 30-year-old man has had burning pain, allodynia, and edema of the hand for six weeks after sustaining a forearm fracture. Appropriate treatment includes each of the following EXCEPT
(A) physical therapy, employing stress loading
(B) oral prazosin
(C) intravenous regional sympathetic block with guanethidine
An anesthetized, paralyzed patient is placed in the lateral position and mechanically ventilated. End-tidal PCO2 is 34 mmHg and PaCO2 is 43 mmHg. This gradient
(A) increases during spontaneous breathing
(B) indicates increased dead space ventilation
(C) is caused by increased intrapulmonary shunt
(D) reflects inhibition of hypoxic pulmonary vasoconstriction
In the PACU after resection of an occipital astrocytoma, a patient has a urine output greater than 300 ml/hr, serum osmolality of 310 mOsm/L, and a hematocrit of 40% (equal to the preoperative value). Intraoperative blood loss was estimated to be 750 ml; furosemide and mannitol were administered during the procedure. The most appropriate next step is
(A) restriction of free water
(B) administration of 0.9% saline solution
(C) administration of desmopressin
(D) administration of dexamethasone
(E) CT scan of the brain
B
The muscular action most likely to remain intact following an axillary brachial plexus block is