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Canadian Journal of Anesthesia, Vol 33, 710-718, Copyright © 1986 by Canadian Anesthesiologists' Society

Single Lever Humphrey A.D.E. Low Flow Universal Anaesthetic Breathing System

Part II: Comparison With Bain System in Anaesthetized Adults During Controlled Ventilation

DAVID HUMPHREY MBBS (Lond.) DA (S.A.)1, JOHN G. BROCK-UTNE MA MB BCH (TCD) FFA (S.A.) MD (Bergen)1, and JOHN W. DOWNING MB BCH FFA (S.A.) FFARCS (Eng.)1

1 Departments of Anaesthetics and Physiology, University of Natal, PO Box 17039, 4013 Congella, Durban, South Africa

Correspondence should be addressed to Dr. Humphrey.

A clinical trial involving ten anaesthetized adult patients was conducted during controlled ventilation using the Humphrey A.D.E. system in the Mapleson "E" mode (lever down). With each patient acting as his or her own control, the parallel (non-coaxial) and coaxial versions of the single lever Humphrey A.D.E. system were compared, using capnography, to the Bain system (Mapleson DIE). All three systems behaved similarly with predictable patient normocarbia when a fresh gas flow of 70 ml·kg-1·min-1 was used. The A.D.E. system has the added advantage that the switch from controlled to spontaneous ventilation (or vice versa) is achieved quickly and simply. Spontaneous, assisted or automatic controlled ventilation could be instituted at any time merely by the appropriate lever position.

Key Words: EQUIPMENT: ANAESTHETIC BREATHING SYSTEMS: Bain, Humphrey A.D.E • VENTILATION: controlled






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Copyright © 1986 by the Canadian Anesthesiologists' Society.