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Patients had invasive mechanical ventilation; vasoactive agent wasn’t used or had been evacuate | 是/Yes |
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sinus rhythm | 是/Yes |
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existing fluid infusion test contraindication (acute coronary syndrome, cardiogenic shock and evidence showing overload fluid) | 否/No |
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being obvious right ventricular dysfunction, right heart failure and tricuspid regurgitation | 否/No |
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being younger than 18 years old | 否/No |
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being gestation | 否/No |
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being intra-abdominal hypertension, bladder pressure measured by catheter ＞16cmH2O | 否/No |
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existing pneumothorax or pulmonary bulla Without drainage. | 否/No |
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the dispensability index of the inferior vena cava, dIVC | 9.79% |
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Stroke VolumeVariation, SVV | 7.58 |
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IVCdmax | 2.13 |
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Mean airway pressure | 5 |
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peak inspiratory pressure | 11 |
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cardiac output | 5.02 |
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CVP | 8 |
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Pulse Pressure Variation, PPV | 11.45 |
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peak inspiratory pressure | PEEP=0时，11；PEEP=5时，18；PEEP=10时，22；PEEP=15时，28. |
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Mean airway pressure | PEEP=0时，5；PEEP=5时，9.5；PEEP=10时，14；PEEP=15时，21. |
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IVCdmax | PEEP=0时，2.17；PEEP=5时，2.09；PEEP=10时，2.14；PEEP=15时，2.12. |
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CVP | PEEP=0时，8；PEEP=5时，9；PEEP=10时，12；PEEP=15时，15. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，9.76%；PEEP=5时，7.88%；PEEP=10时，6.02%；PEEP=15时，6.17%. |
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Pulse Pressure Variation | PEEP=0时，11.33；PEEP=5时，12.38；PEEP=10时，14.38；PEEP=15时，16.88. |
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Stroke VolumeVariation, SVV | PEEP=0时，7.52；PEEP=5时，7.48；PEEP=10时，8.08；PEEP=15时，3.12. |
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cardiac output | PEEP=0时，5.85；PEEP=5时，5.76；PEEP=10时，5.186PEEP=15时，4.96. |