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Methohexital Sodium, Brevane, Anesthesia for Calves and Sheep¹

Experimental Surgery Laboratory, Dairy Science Department, University of Maryland, College Park

ABSTRACT

Brevane² is a short-acting general anesthetic widely used in minor surgery on dogs and cats (1). Results given in this report support its use on calves and sheep. Calves recovered faster from this drug than from other anesthetics and were usually ambulatory in 30 to 90 min after stopping the infusion; whereas, Nembu-tal-anesthetized calves were down for from 10 to 18 hr. Brevane also has a wide effective threshold, especially in sheep, which increases its safety.

Dosages required are given in Table 1.

Use of an endotracheal tube with inflatable cuff has been found to be essential, especially in calves. Three calves were lost before this requirement was appreciated. We now strive for rapid induction and immediate placement of the endotracheal tube.

ACKNOWLEDGMENT

Dr. A. C. Brown suggested this drug. Dr. James C. Smith, J. H. Nicolai, H. F. Downey, R. J. McCormick, R. T. Bowman, and F. C. Blank assisted with this work.

¹ Scientific article No. A-1163. Contribution No. 3636 of the Maryland Agricultural Experiment Station, University of Maryland, College Park.