Continuous S-vO2 measurement and oxygen transport patterns in cardiac surgery patients.
Crit Care Med
; 12(6): 523-7, 1984 Jun.
Article
em En
| MEDLINE
| ID: mdl-6723338
ABSTRACT
Twenty adult cardiac surgery patients with impaired ventricular function by contrast ventriculography at cardiac catheterization were monitored from before anesthesia until the time of extubation up to 12 h postoperatively. A thermodilution pulmonary artery catheter with fiberoptic channels for continuous measurement of mixed-venous oxygen saturation (S-vO2) by reflection oximetry was substituted for the usual catheter. The S-vO2 was recorded continuously along with blood pressure, cardiac filling pressures, and heart rate. Thermodilution cardiac output determinations were used to derive hemodynamic and oxygen transport indices. There was a consistently high and significant negative correlation (r = -.84) between S-vO2 and the percentage of oxygen extracted from blood. Thus, S-vO2 reflects oxygen extraction and continuous S-vO2 provides continuous quantification of global oxygen extraction. None of the other oxygen transport variables including cardiac index showed significant correlation with S-vO2. The oximetry system provides a continuous and reliable indication of mixed-venous blood oxygenation which is a continuous reflection of oxygen extraction.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
/
Cateterismo Cardíaco
/
Procedimentos Cirúrgicos Cardíacos
Limite:
Aged
/
Humans
/
Middle aged
Idioma:
En
Revista:
Crit Care Med
Ano de publicação:
1984
Tipo de documento:
Article