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A flexible unkinkable cannula and its obstruction by dicalcium orthophosphate concretions
Abstract
Chronic cannulation of an abdominal viscus or pouch is aided by the use of a cannula which does not leak or kink. Existing cannulae have been modified to achieve this. An unusual complication was encountered in jejunal cannulae after 1 - 3 months; large concretions of dicalcium orthophosphate precipitated on the inner cannula flange, completely blocking the lumen. Concretions were derived from the food, precipitation being aided by physicochemical factors in the jejunum.
S. Afr. Med. J., 48, 1879 (1974).
S. Afr. Med. J., 48, 1879 (1974).