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Canadian Journal of Anesthesia, Vol 33, 94-96, Copyright © 1986 by Canadian Anesthesiologists' Society

Technical Report: A High-Pressure Alarm for the Detection of Obstruction of the Fresh Gas Line in the T-Piece Circuit

D. JOHN DOYLE P ENG MD1 and J.E. S. RELTON MB FRCPC FFARCS(ENC)1

1 Department of Anaesthesia, The Hospital for Sick Children, 555 University Avenue, Toronto, Ontario M5G 1X8

correspondence should be addressed to: Dr. Relton.

An electronic high-pressure alarm for detecting obstruction of the fresh gas flow line in T-piece type anaesthetic circuits is described. The system is small, battery operated, and unobtrusive on the anaesthetic machine. The alarm is designed to sound whenever an obstruction reduces fresh gas flow to the patient, resulting in undesired rebreathing of expired gases.

Key Words: EQUIPMENT: high pressure alarm • EQUIPMENT, CIRCUITS: T-piece






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Copyright © 1986 by the Canadian Anesthesiologists' Society.