Design and validation of an indicator gas injector for multiple gas washout tests in mechanically ventilated patients.
Crit Care Med
; 18(7): 754-9, 1990 Jul.
Article
em En
| MEDLINE
| ID: mdl-2364717
ABSTRACT
A device to produce a stepwise indicator gas fraction variation to initiate a washout test in mechanically ventilated patients is described. The device, which can be used in conjunction with the commonly used Siemens-Elema series 900 ventilators, is based on simple, off-the-shelf technology. It features the simultaneous use of two indicator gases (so that the influence of diffusion processes in the gas exchange to the patient can be measured) and maintains a nearly constant FIO2 during a washout procedure. With this indicator gas injector, the transition time of the indicator gas fraction at the beginning of a washout proved to be short enough to detect ventilation inhomogeneity by visual inspection of the washout curves. Functional residual capacity measurements using this device are presented on a test lung with known volume, on healthy volunteers, and on critically ill patients.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Respiração
/
Ventiladores Mecânicos
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Limite:
Adolescent
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Adult
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Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Crit Care Med
Ano de publicação:
1990
Tipo de documento:
Article