In the current study we performed a series of tests using polycarbonate parts of both intact and damaged membrane oxygenators and bringing them into contact with volatile anesthetic agents. Most of the components of the oxygenator and the venous reservoir are manufactured from polycarbonate. This material is a special class of polyester derived from the reaction of carbonic acid derivatives with aromatic, aliphatic or mixed diols. It melts at 215-225 C and may be shaped with sufficient pressure. The plasticized polyvinylchloride tubing for blood circulation is attached directly to the in- and outlets of the venous reservoir and oxygenating part.
Arrow indicates venous outlet where crack occurred.
It reacts with aluminum, brass and lead in the presence of water. Copper and chromium remain unaffected. Rubber is soluble to a degree and polyethylene dissolves entirely in this agent. Three new and five used oxygenators were employed in the tests. A few drops of enflurane and isoflurane were dripped onto the venous reservoir outlet to the pump loop of the five used and the three new oxygenators.