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Effects of stroke volume variation, pulse pressure variation, and pleth variability index in predicting fluid responsiveness during different positive end expiratory pressure in prone position.

仰卧位 医学 冲程容积 脉冲压力 心脏指数 麻醉 血流动力学 心脏病学 血管内容积状态 心输出量 心率 内科学 血压
作者
Yu Chen,Qiang Fu,Weidong Mi
出处
期刊:PubMed 卷期号:37 (2): 179-84 被引量:4
标识
DOI:10.3881/j.issn.1000-503x.2015.02.008
摘要

To investigate the effects of different positive end expiratory pressures (PEEP) on functional hemodynamic parameters in patients lying in prone position during operation under general anesthesia.Totally 60 patients undergoing cervical vertebra operation or lumbar vertebra operation were studied. All patients were also monitored with Vigileo/FloTrac system. The functional hemodynamic parameters including stroke volume variation (SVV), pulse pressure variation (PPV), and pleth variability index (PVI) under PEEP levels of 0 mmHg, 5 mmHg, 10 mmHg, and 15 mmHg were recorded before and after volume expansion (hydroxyethyl starch 6%,7 ml/kg). Fluid responsiveness was defined as an increase in stroke volume index (SVI) ≥ 15%(△SVI ≥ 15%). Responders were defined as patients demonstrating an increase in SVI ≥ 15% after intravascular volume expansion and non-responders as patients whose SVI changed <15%. Receiver operating characteristic (ROC) curves were generated for SVV, PPV, and PVI under different PEEP levels to determine their diagnosis accuracies and thresholds and their potential correlations.In the prone position, SVV, PPV, and PVI were significantly higher compared to those in the supine position (P<0.05) and the mean arterial pressure significantly decreased (P<0.05); however, the changes of heart rate, stroke volume, SVI, cardiac output, and cardiac index showed no significant difference (P>0.05). In the prone position, along with the elevation of PEEP (0 mmHg, 5 mmHg, 10 mmHg, and 15 mmHg), the areas under the ROC curves of SVV were 0.864, 0.759, 0.718, and 0.521, the area under the ROC of PPV were 0.873, 0.792,0.705, and 0.505, and the area under the ROC of PVI were 0.851, 0.765 ,0.709, and 0.512. Under PEEP=0 mmHg, the diagnostic thresholds of SVV, PPV, and PVI were 10.5, 11.5, and 13.5. Under PEEP=5 mmHg, the diagnostic thresholds of SVV,PPV, and PVI were 11.5,13.5, and 14.5.Under PEEP=10 mmHg,the diagnostic thresholds of SVV, PPV, and PVI were 13.5,14.5, and 16.5.In the prone position,there was a significant correlation between SVV,PPV,PVI,and PEEP.SVV,PPV and PVI can predict fluid responsiveness similarly under the PEEP levels of 0,5, and 10 mmHg. Their diagnostic thresholds increases with the PEEP and the diagnostic accuracies decrease with the PEEP. However, under the PEEP level of 15 mmHg, SVV, PPV, and PVI can not predict fluid responsiveness accurately.

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