Fluid administration is one of the main strategies for patients with acute circulatory failure. However, about half of the patients could not benefit from the fluid administration after the ICU admission. Thus predict the effect of fluid responsiveness is essential. There are sevral indices or tests can be used, such as pulse pressure variation (PPV), end-expiratory occulsion test (EEOT), passive leg raising (PLR), etc. Question of the prevalence of cases in which the different predictive indices of fluid responsiveness in intensive care unit (ICU) are not applicable.
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The prevalence of cases and reasons in which the conditions that the PPV cannot be correctly interpreted.
Timeframe: One minute at the bedside
The prevalence of cases and reasons in which the conditions that the EEOT cannot be correctly interpreted.
Timeframe: 15 seconds for EEOT
The prevalence of cases and reasons in which the conditions that the PLR cannot be correctly interpreted.
Timeframe: One minute fot the passive leg raising