Evaluation of a noninvasive method for cardiac output measurement in critical care patients.
Intensive Care Med
; 28(10): 1470-4, 2002 Oct.
Article
em En
| MEDLINE
| ID: mdl-12373473
ABSTRACT
OBJECTIVE:
Thermodilution (TD) is the gold standard to monitor cardiac output (CO) in critical care. However, there is concern about the safety of right-ventricular catheterization. The CO(2) rebreathing technique allows noninvasive CO determination by means of the indirect Fick principle. Our objectives were (a) to assess the accuracy of a new system of CO measurement using the CO(2) partial rebreathing method (PRCO); (b) to evaluate whether the PRCO itself may induce changes in CO. DESIGN ANDSETTING:
Prospective study in the intensive care department in a university-affiliated hospital. PATIENTS Twenty-two mechanically ventilated critically ill patients.INTERVENTIONS:
CO measured simultaneously by PRCO and TDCO. MEASUREMENTS ANDRESULTS:
PRCO and TDCO values were compared by concordance analysis. Stability of cardiac output during PRCO was evaluated by comparing the TDCO measurements before, during, and after the partial rebreathing period using analysis of variance. From a total of 79 valid sets of measurements, bias and precision was calculated at -0.18+/-1.39 l/min. The concordance analysis of lower and intermediate CO values (<7 l/min) yielded a bias and precision calculation of -0.07+/-0.91 l/min. No changes in hemodynamics were observed during the partial rebreathing period.CONCLUSIONS:
The noninvasive partial CO(2) rebreathing technique may be an alternative method for CO determination in mechanically ventilated critically ill patients. The rebreathing maneuver alone does not induce changes in CO.
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Base de dados:
MEDLINE
Assunto principal:
Respiração Artificial
/
Débito Cardíaco
/
Cuidados Críticos
/
Monitorização Fisiológica
Tipo de estudo:
Evaluation_studies
/
Observational_studies
Limite:
Humans
País como assunto:
Europa
Idioma:
En
Ano de publicação:
2002
Tipo de documento:
Article