| Full text | |
| Author(s): |
Flávio Marson
[1]
;
Maria Auxiliadora Martins
[2]
;
Francisco Antonio Coletto
[3]
;
Antonio Dorival Campos
[4]
;
Anibal Basile-Filho
[5]
Total Authors: 5
|
| Affiliation: | [1] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto
[2] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto
[3] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto
[4] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto
[5] Universidade de São Paulo. Faculdade de Medicina de Ribeirão Preto
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Arquivos Brasileiros de Cardiologia; v. 82, n. 1, p. 72-76, 2004-01-00. |
| Abstract | |
OBJECTIVE: To compare the oxygen consumption index measured by using indirect calorimetry (VO2I Delta) with a portable metabolic cart and calculated according to Fick's principle (VO2 I Fick) in critically ill patients. METHODS: Fourteen patients (10 men and 4 women, mean age 39.4 ± 5.4 years) were analyzed, 5 of them trauma victims and 9 sepsis victims. The following mean scores were obtained for these patients: APACHE II = 21.3±1.8, ISS = 24.8±6, and sepsis score = 19.6±2.3. The mortality risk (odds ratio), calculated from APACHE II, was 41.9±7.1%. All patients underwent mechanical ventilation and invasive hemodynamic monitoring with a Swan-Ganz catheter. VO2 was obtained using the 2 methods (VO2I Delta and VO2I Fick) at 4 different times (T1-T4). RESULTS: A good correlation was found between the 2 methods (r=0.77) for the mean of the 4 serial measurements. No statistically significant differences were observed between indirect calorimetry and Fick's equation at T1 (VO2I Delta = 138±28 and VO2I Fick = 59±38 mL.min-2.m-2, P=0.10) and T3 (VO2I Delta = 144±26 and VO2I Fick = 158±35 mL.min-2.m-2, P=0.14), but a significant difference was observed at T2 (VO2I Delta = 141±27 and VO2I Fick = 155±26 mL.min-2.m-2, P=0.03) and T4 (VO2I Delta = 145±24 and VO2I Fick = 162±26 mL.min-2.m-2, P=0.01). CONCLUSION: We may state that indirect calorimetry can be used for oxygen consumption analysis in critically ill patients and is as efficient as Fick's reverse equation, with the benefit of being a noninvasive and risk-free procedure. (AU) | |