[Estimation of respiratory functions by analysis of expired gas and blood gas during artificial ventilation and general anesthesia].
Masui
; 44(4): 508-15, 1995 Apr.
Article
em Ja
| MEDLINE
| ID: mdl-7776514
ABSTRACT
One-hundred and seven patients undergoing elective surgery were studied to analyze the correlations between preoperative spirometric values and respiratory parameters during general anesthesia. They were grouped according to 3 criterions; preoperative %VC of less than 80%, FEV1.0% of less than 70%, V50/V25 exceeding 4.0. Following the induction of general anesthesia and of mechanical ventilation, expiratory flow (VE), FECO2, PaCO2 and PaO2 were measured to calculate respiratory parameters including VCO2-SR, VD/VT-Bohr, VD/VT-physiological (phys), a-ETDCO2, Volume Pressure Index (VPI) and A-aDO2. Six respiratory parameters were compared between the groups, and correlations between preoperative spirometric values were studied. Those with lower %VC had higher values in VCO2-SR and in VPI, and those with lower FEV1.0% had higher values in VCO2-SR, in VD/VT-phys and in a-ETDCO2. Significant correlations were also observed between these parameters. Preoperative V50/V25 and A-aDO2 during general anesthesia did not correlate with any of the parameters studied. We conclude that VCO2-SR, VD/VT-phys, a-ETDCO2 and VPI during general anesthesia are useful to detect the patients with restrictive and/or obstructive lung dysfunction, although they are not sensitive enough to detect those with small airway disease.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Respiração
/
Respiração Artificial
/
Anestesia Geral
/
Pneumopatias Obstrutivas
Limite:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
Ja
Revista:
Masui
Ano de publicação:
1995
Tipo de documento:
Article