We report a serious dysfunction of 19 halothane vaporisers Vapor 19.3(TM) (
Drager) which delivered a much higher concentration of agent than indicated
on the dial. This inaccuracy was linked to a major corrosion of the inner
layers of the vaporiser, with a deposit of zinc bromide and chloride in the
bypass channel. The main cause for this dysfunction was the absence of an
adequate maintenance of the vaporisers since their purchase 3 years before.
(C) 1998 Elsevier, Paris.