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Furosemide Vasodilates the Canine Gastrointestinal Tract
Author(s) -
WALLACH STANLEY,
CHARBON GERARD A.,
BEIJER HEIN J. M.,
STRUYVENBERG ALBERT
Publication year - 1982
Publication title -
the journal of clinical pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 116
eISSN - 1552-4604
pISSN - 0091-2700
DOI - 10.1002/j.1552-4604.1982.tb02685.x
Subject(s) - duodenum , furosemide , vasodilation , small intestine , stomach , medicine , gastrointestinal tract , blood flow , chemistry , gastroenterology
The ability of furosemide to induce vasodilation in the canine gastrointestinal system was studied by quantitative flowmetry. Blood flow and conductance increased maximally by 60 per cent in the stomach and duodenum and by 80 per cent in the small and large intestine. Vasodilation was evident at 2.4 mg/kg furosemide and higher. The onset of vasodilation occurred at 24 to 30 seconds and was maximal at 36 seconds in the stomach, at 66 seconds in the duodenum, at 78 to 84 seconds in the small intestine, and at 90 seconds in the large intestine. Hepatic arterial, splenic, and renal blood flows were unchanged. Simultaneous arteriovenous sampling from the small intestine indicated that the increased blood flow was not associated with increased O 2 consumption. However, CO 2 addition to the venous effluent decreased by 70 per cent. These data indicate that furosemide has a vasodilatory action on the gastrointestinal tract due either to a delayed effect on the vascular smooth muscle cell or on anaerobic bowel wall metabolism. The CO 2 data are compatible with, but do not prove, stimulation of secretion of HCO 3 – by the intestinal mucosa.