Each of the following findings is characteristic of chronic reflex sympathetic dystrophy of the extremities EXCEPT
(A) allodynia
(B) bone demineralization
(C) edema
(D) hyperpathia
(E) warm skin
E
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
Compared with healthy persons, patients with myasthenic (Eaton-Lambert) syndrome have increased
(A) resistance to vecuronium
(B) response to neostigmine during reversal of muscle paralysis
(C) sensitivity to succinylcholine
(D) susceptibility to development of malignant hyperthermia
(E) weakness with repetitive activity
C
Preoperative parenteral administration of vitamin K is LEAST likely to decrease a prolonged prothrombin time in a patient with
(A) end-stage hepatocellular disease
(B) malabsorption associated with ulcerative colitis
(C) obstructive jaundice
(D) long-term antibiotic therapy
(E) warfarin-induced prothrombin deficiency
A
An 18-year-old woman has knee pain during arthroscopy performed with femoral and sciatic nerve blocks for repair of a torn medial meniscus. The most appropriate management is addition of which of the following nerve blocks?