Which of the following is most likely to decrease in the affected area following a paravertebral lumbar sympathetic block?
(A) Cutaneous blood flow
(B) Pinprick sensation
(C) Sweating
(D) Temperature sensation
(E) Venous capacitance
C
Alveolar partial pressure of an inhaled anesthetic rises more rapidly in a parturient at term than in a nonpregnant woman because
(A) functional residual capacity is decreased
(B) PaC02 is decreased
(C) uptake of inhaled agents by tissues is decreased
(D) cardiac output is increased
(E) physiologic dead space is increased
A
Neurolytic block is most appropriate for
(A) abdominal pain secondary to hepatic carcinoma
(B) abdominal pain secondary to chronic pancreatitis
(C) persistent chest wall pain secondary to intercostal neuralgia following a thoracotomy for trauma
(D) reflex sympathetic dystrophy of the upper extremity with an excellent but transient response to a series of stellate ganglion blocks with local anesthetic
(E) a diabetic patient scheduled for surgical sympathectomy to relieve unilateral lower extremity pain secondary to severe peripheral vascular disease
An 86-kg, 67-year-old man is undergoing a second coronary artery bypass operation. Five minutes after administration of protamine, blood pressure is 69/40 mmHg, pulmonary artery pressure is 65/42 mmHg, and the cardiac output measured by thermodilution is 2.3 L/min. Which of the following is the most likely cause of these findings?
(A) Allergy to fish
(B) Increased plasma thromboxane concentration
(C) Increased plasma histamine concentration
(D) Insulin-dependent diabetes mellitus
(E) IgE antibodies to protamine
B
Forty-eight hours after thoracotomy, a patient's T6-7 epidural catheter is removed and the distal 2 cm is noted to be missing. The patient felt no pain during removal and neurologic examination shows no abnormalities. After informing the patient, which of the following is the most appropriate next step in management?
In the absence of coronary artery disease, isoflurane-induced vasodilation and tachycardia are beneficial hemodynamic goals for which of the following cardiac diseases?
A 6-year-old boy with spina bifida and a chronic indwelling urinary catheter has severe hypotension and hypoxemia during augmentation cystoplasty. Which of the following is the most likely cause?