Inspiratory valve malfunction in a circle system: pitfalls in capnography
Can J Anaesth
; 39(9): 997-9, Nov. 1992.
Artigo
em Inglês
| MedCarib
| ID: med-15975
Biblioteca responsável:
JM3.1
Localização: JM3.1; RD79.A1C3
ABSTRACT
Capnography is a useful technique in monitoring the integrity of anaesthetic equipment such as the malfunctioning of unidirectional valves in circle system. However, the lack of a precise mechanism in existing capnographs to identify the start of inspiration and the beginning of expiration in the capnograms, makes the analysis of the carbon dioxide waveforms during inspiration difficult and thus results in inaccurate assessement of rebreathing. We report a case where, during the malfunction of the inspiratory unidirectional valve in the circle system, the capnograph failed to detect the presence of substantial rebreathing. Critical analysis of the capnogram recorded during the malfunction revealed that there was substantial rebreathing which was underestimated by the capnograph as it reports only the lowest CO2 concentration rebreathed during inspiration in such abnormal situations.(AU)
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Coleções:
Bases de dados internacionais
Base de dados:
MedCarib
Assunto principal:
Anestesia com Circuito Fechado
/
Dióxido de Carbono
/
Monitorização Fisiológica
Tipo de estudo:
Estudo prognóstico
Limite:
Feminino
/
Humanos
Idioma:
Inglês
Revista:
Can J Anaesth
Ano de publicação:
1992
Tipo de documento:
Artigo