Which of the following inhalational anesthetics best relieves left ventricular outflow obstruction in a patient with hypertrophic obstructive cardiomyopathy (IHSS)?
(A) Desflurane
(B) Halothane
(C) Isoflurane
(D) Nitrous oxide
(E) Sevoflurane
B
After brachial plexus block via an axillary approach, a patient has sensation on the dorsum of the second and third digits and is able to extend the distal phalanx of the thumb. To block the unaffected nerve, anesthetic should be injected at which of the following sites?
(A) 2 Cm lateral to the biceps tendon at the level of the elbow
(B) At the radial border of the palmaris longus tendon
(C) Between the medial epicondyle and the olecranon
(D) Between the radial artery and the styloid process
(E) Just medial to the brachial artery at the elbow
A
Which of the following is the best initial treatment of anaphylaxis that occurs during general anesthesia?
A 70-kg 22-year-old patient with head trauma and multiple fractures of the long bones is scheduled for fixation of bilateral femoral fractures. Preoperative laboratory studies show a serum sodium concentration of 150 mEq/L, a serum potassium concentration of 3.1 mEq/L, and a urine output greater than 500 ml/hr. Which of the following agents will decrease urine output?
A 25-year-old woman is receiving magnesium sulfate for eclampsia at 36 weeks' gestation. Each of the following is a maternal effect of this treatment EXCEPT
(A) sedation
(B) sensitization to depolarizing muscle relaxants
(C) sensitization to nondepolarizing muscle relaxants
(D) decreased uterine blood flow
(E) loss of deep tendon reflexes prior to significant cardiac dysfunction
Which of the following findings on the left is most likely to be associated with an increased risk of complications with cannulation of the left internal jugular vein compared with cannulation of the right internal jugular vein?
(A) Longer recurrent laryngeal nerve
(B) Lower location of the cupola of the pleura
(C) More acute angle between the internal jugular and innominate veins