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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 | 12.3% |
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Stroke VolumeVariation, SVV | 9.8 |
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IVCdmax | 1.64 |
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Mean airway pressure | 5 |
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peak inspiratory pressure | 10 |
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cardiac output | 4.87 |
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CVP | 4 |
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Pulse Pressure Variation, PPV | 25.31 |
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peak inspiratory pressure | PEEP=0时，10；PEEP=5时，17；PEEP=10时，23；PEEP=15时，29. |
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Mean airway pressure | PEEP=0时，5；PEEP=5时，8；PEEP=10时，15；PEEP=15时，17. |
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IVCdmax | PEEP=0时，1.64；PEEP=5时，1.58；PEEP=10时，1.7；PEEP=15时，1.68. |
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CVP | PEEP=0时，4,；PEEP=5时，7；PEEP=10时，8；PEEP=15时，12. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，12.3%；PEEP=5时，12.8%；PEEP=10时，10.6%；PEEP=15时，9.8%. |
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Pulse Pressure Variation | PEEP=0时，25.19；PEEP=5时，22.95；PEEP=10时，33.63；PEEP=15时，44.92. |
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Stroke VolumeVariation, SVV | PEEP=0时，9.78；PEEP=5时，10.4；PEEP=10时，10.6；PEEP=15时，10.17. |
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cardiac output | PEEP=0时，5.75；PEEP=5时，4.08；PEEP=10时，4.76；PEEP=15时，4.26. |