Responsiveness of stroke volume variation and central venous pressure during acute normovolemic and hypervolemic hemodilution
- Author:
- No author available
- Journal Title:
- Chinese Medical Journal
- Issue:
- 10
- DOI:
- 10.3760/cma.j.issn.0366-6999.20122525
- Key Word:
- hemodilution;stroke volume variation;central venous pressure
Abstract： Background Streke volume variation (SW) is a robust indicator of fluid responsiveness during volume change.We compared the sensibility of SW by Vigileo/Flotrac to central venous pressure (CVP) when volume changes in patients undergoing intraoperative acute normovolemic hemodilution (ANH) and acute hypervolemic hemodilution (AHH).Methods Forty patients were randomly divided into an ANH group (n=20) and an AHH group (n=20).All patients received general anesthesia and were mechanically ventilated.Data were collected from 7 different time-points in the ANH group:baseline,after withdrawal of 5％,10％,and 15％ of the estimated blood volume (EBV) and after replacement with an equal volume of 6％ hydroxyethyl starch 130/0.4 (HES) in 5％ EBV increments to baseline.There were four time points in the AHH group:baseline,after 5％,10％,and 15％ expansion of the EBV with 6％ HES.At each time-point,CVP,SW and other hemodynamic parameters measurements were obtained.Results After removal of 10％ and 15％ EBV,SW significantly increased from 10.9±3.0 to 14.1±3.4 and 10.9±3.0 to16.0±3.3 (P ＜0.01),and returned to a final value of 10.6±3.4 after volume replacement.The CVP value was unchanged after removal and replacement of 15％ of the EBV.There were no significant changes in SW after 5％,10％ whereas there was a significant reduction after 15％ (8.2±1.7) expansion of the EBV compared with baseline (9.9±1.8) (P=-0.033).However,there was a significant increase in CVP after10％ (10.3±2.4),15％ (11.3±2.2) expansion of the EBV compared with baseline (8.2±2.7) (P ＜0.01).Conclusion SW is a more sensitive parameter for volume than CVP during hypovolemia,on the contrary CVP is more sensitive than SW during hypervolemia.
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