Abstract
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 70ml.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.
Résumé
Une étude clinique de dix patients adultes aneslhésiés en ventilation contrôlée utilisant le système de Humphrey A.D.E, en mode“E” est présentée. Chacun des patients se présentant comme son propre contrôle, on a comparé la version parallèle (non coaxiale) et la version coaxiale du système Humphrey A.D.E. à levier unique utilisant le capnographe, au circuit de Bain (Mapleson DIE). Tous les trois systèmes se sont comportés a” une façon identique en tenant un patient en normocarbie lorsqu’ un flot de gaz frais de 70 ml.kg-1.min-1 était utilité. Le système A.D.E. présentait l’avantage additionnel d’un interrupteur pouvant permettre simplement et facilement le changement d’une ventilation spontanée en contrôlée (ou vice versa).
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Abbreviations
- A.D.E.:
-
Humphrey A.D.E. anaesthetic breathing system
- A.D.E.:
-
A.D.E. set in A mode
- A.D.E.:
-
A.D.E. set in D mode
- A.D.E.:
-
A.D.E. set in E mode
- FGF:
-
Fresh gas flow
- PiCO2 :
-
Minimum inspired carbon dioxide tension
- PéCO2 :
-
End-expired (or end-tidal) carbon dioxide tension
- PaCO2 :
-
Arterial carbon dioxide tension
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Humphrey, D., Brock-Utne, J.G. & Downing, J.W. Single lever Humphrey A.D.E.lowflow universal anaesthetic breathing system. Can Anaesth Soc J 33, 710–718 (1986). https://doi.org/10.1007/BF03027119
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DOI: https://doi.org/10.1007/BF03027119