Gas-driven ventilators are being increasingly used in anaesthesia. Industrial type fittings are commonly used at various points in the gas lines that drive these ventilators. These fittings do not have the Pin Index or the Diameter Index. They allow the possibility of the oxygen hose connected to a Boyle apparatus accidentally supplying a gas other than oxygen.
These potentially dangerous fittings are discussed, methods of modifying them suggested, and a new alternative adaptor described.
References
1.
British Standard 1319: 1955. “Medical Gas Cylinders and Anaesthetic Apparatus.”
2.
International Standards Organization R32:1957. “Identification of the Content of Gas Cylinders Intended for Medical Use.”
3.
Australian Standard CB 4—1969, Supplement No. 2. “Identification of Medical Gas Cylinders.”
