Single lever Humphrey A.D.E.lowflow universal anaesthetic breathing system

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.RésuméUne 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).

[1]  John F. Nunn,et al.  Applied Respiratory Physiology , 1977 .

[2]  S. Oliver A Suggestion , 1907, Nature.

[3]  D. Humphrey A new anaesthetic breathing system combining Mapleson A, D and E principles , 1983, Anaesthesia.

[4]  N. Newton,et al.  The ultimate goal? , 1983, Anaesthesia.

[5]  J. A. Bain,et al.  Single lever Humphrey A.D.E. low flow universal anaesthetic breathing system , 1987, Canadian journal of anaesthesia = Journal canadien d'anesthesie.

[6]  C. Conway Anaesthetic breathing systems. , 1985, British journal of anaesthesia.

[7]  J. G. Patebson,et al.  A hazard associated with improper connection of the bain breathing circuit , 1975, Canadian Anaesthetists' Society journal.

[8]  J A Bain,et al.  A streamlined anaesthetic system , 1972, Canadian Anaesthetists' Society journal.

[9]  S. Snowdon,et al.  Coaxial breathing system , 1983 .

[10]  A. Manicom,et al.  The Johannesburg A-D circuit switch. A valve device for converting a co-axial Mapleson D into a co-axial Mapleson A system. , 1979, British journal of anaesthesia.

[11]  C. Conway,et al.  A new coaxial breathing system , 1985, Anaesthesia.

[12]  G. P. Ramayya Multi‐mode switchable breathing systems , 1985, Anaesthesia.

[13]  J. Takala,et al.  Hypophosphatemia in Hypercatabolic Patients , 1985, Acta anaesthesiologica Scandinavica. Supplementum.

[14]  D. Humphrey The ADE anasthetic breathing system , 1983 .

[15]  J. Brock‐Utne,et al.  Single lever Humphrey A.D.E. low flow universal anaesthetic breathing system , 1986, Canadian Anaesthetists' Society journal.

[16]  J. Lack,et al.  Theatre pollution control , 1976, Anaesthesia.

[17]  I. M. Salkield 1. Description of a Device Providing Several Mapleson Functions , 1985, Anaesthesia and intensive care.

[18]  M. Morgan,et al.  An assessment of the Humphrey ADE anaesthetic system in the Mapleson A mode during spontaneous ventilation , 1984, Anaesthesia.

[19]  J. Bennett,et al.  A new co‐axial breathing system , 1985, Anaesthesia.