British Journal of Anaesthesia, Vol 82, Issue 2 250-254, Copyright © 1999 by The Board of Management and Trustees of the British Journal of Anaesthesia
J. Olsson and R. G. Hahn
Glycine 1.5% is the most widely used irrigating fluid during endoscopic
procedures. To investigate if glycine toxicity is a mechanism promoting a
fatal outcome when the solution is absorbed, we administered glycine 200 or
300 ml kg-1 dissolved in sterile water or normal saline, and also normal
saline alone, over 60 min by i.v. infusion to 100 mice under methoxyflurane
anaesthesia. Survival rates were 29% after 1.5% glycine, 21% after 1.5%
glycine in normal saline, 67% after normal saline and 100% in controls.
Both solutions containing glycine induced bradycardia and prolongation of
the PQ interval and QRS duration, while only 1.5% glycine increased the
water content of the myocardium. These results suggest that glycine
promotes bradycardia and death, regardless of whether hyponatraemia or
hypo-osmolality is present. We conclude that glycine toxicity is an
important factor that increases the risk of administration of an irrigating
fluid.
LABORATORY INVESTIGATIONS
Glycine toxicity after high-dose i.v. infusion of 1.5% glycine in the mouse
Department of Anaesthesia and Intensive Care, Central Hospital, Sundsvallt, Sweden; Karolinska Institutet, Soder Hospital, Stockholm, Sweden
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