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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 | 14.58% |
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Stroke VolumeVariation, SVV | 13.22 |
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IVCdmax | 1.7 |
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Mean airway pressure | 6 |
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peak inspiratory pressure | 15 |
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cardiac output | 4.95 |
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CVP | 5 |
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Pulse Pressure Variation, PPV | 12.24 |
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peak inspiratory pressure | PEEP=0时，16；PEEP=5时，19；PEEP=10时，27；PEEP=15时，30. |
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Mean airway pressure | PEEP=0时，6；PEEP=5时，10.4；PEEP=10时，16；PEEP=15时，21. |
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IVCdmax | PEEP=0时，1.72；PEEP=5时，1.8；PEEP=10时，1.98；PEEP=15时，2.1. |
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CVP | PEEP=0时，6；PEEP=5时，8；PEEP=10时，10；PEEP=15时，13. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，14.38%；PEEP=5时，14.2%；PEEP=10时，15.3%；PEEP=15时，10.47%. |
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Pulse Pressure Variation | PEEP=0时，12.22；PEEP=5时，18.26；PEEP=10时，22.73；PEEP=15时，24.18. |
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Stroke VolumeVariation, SVV | PEEP=0时，13.22；PEEP=5时，15.4；PEEP=10时，17.6；PEEP=15时，21.16. |
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cardiac output | PEEP=0时，5.84；PEEP=5时，5.71；PEEP=10时，5.45；PEEP=15时，5.16. |