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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 | 7.62% |
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Stroke VolumeVariation, SVV | 7.6 |
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IVCdmax | 2.02 |
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Mean airway pressure | 5.5 |
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peak inspiratory pressure | 12 |
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cardiac output | 5.32 |
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CVP | 8 |
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Pulse Pressure Variation, PPV | 7.82 |
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peak inspiratory pressure | PEEP=0时，14；PEEP=5时，19；PEEP=10时，24；PEEP=15时，29. |
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Mean airway pressure | PEEP=0时，5.7；PEEP=5时，10；PEEP=10时，16；PEEP=15时，17. |
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IVCdmax | PEEP=0时，2.06；PEEP=5时，2.1；PEEP=10时，2.2；PEEP=15时，2.27. |
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CVP | PEEP=0时，10；PEEP=5时，11；PEEP=10时，12；PEEP=15时，16. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，7.59%；PEEP=5时，4.38%；PEEP=10时，11.54%；PEEP=15时，9.38%. |
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Pulse Pressure Variation | PEEP=0时，7.78；PEEP=5时，9.18；PEEP=10时，12.3；PEEP=15时，14.18. |
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Stroke VolumeVariation, SVV | PEEP=0时，7.6；PEEP=5时，9.32；PEEP=10时，11.46；PEEP=15时，13.19. |
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cardiac output | PEEP=0时，6.2；PEEP=5时，6；PEEP=10时，5.78；PEEP=15时，5.17. |