During transurethral resection of the prostate under spinal anesthesia with a sensory level to T10, a patient has sudden onset of sharp upper abdominal pain and nausea. Arterial blood pressure increases from 120/80 to 150/90 mmHg; the patient becomes diaphoretic. Which of the following is the most likely diagnosis?
Postoperatively, a patient is being mechanically ventilated by a constant-flow, pressure-cycled ventilator with the following initial settings: inspiratory/expiratory (I/E) ratio of 1:2, peak inspiratory pressure (PIP) of 25 cmH2O, and rate of 10/min. One hour later, the I/E ratio is 1:4. Which of the following would ensure that the minute ventilation is the same as that initially set?
(A) Inflate the endotracheal tube cuff to prevent leakage
(B) Double the respiratory rate
(C) Decrease the expiratory pause until the I/E ratio is 1.0
As part of a preoperative evaluation, a patient had a thallium scan showing a 'cold spot' over the left ventricle that occurs with moderate exercise and disappears at rest. This most likely indicates
A patient is in sinus rhythm but has no pulse during cardiopulmonary resuscitation. There is marked resistance to positive pressure ventilation and breath sounds are difficult to hear bilaterally. The endotracheal tube is clearly in the trachea. The most appropriate next step in management is to
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?
A 64-year-old man with a large pancreatic tumor has severe abdominal pain that radiates to the low back. Which of the following is the most appropriate management?