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sinus rhythm | 是/Yes |
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Patients had invasive mechanical ventilation; vasoactive agent wasn’t used or had been evacuate | 是/Yes |
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existing pneumothorax or pulmonary bulla Without drainage. | 否/No |
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being intra-abdominal hypertension, bladder pressure measured by catheter ＞16cmH2O | 否/No |
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being gestation | 否/No |
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being younger than 18 years old | 否/No |
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being obvious right ventricular dysfunction, right heart failure and tricuspid regurgitation | 否/No |
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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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cardiac output | 4.56 |
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peak inspiratory pressure | 12 |
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Mean airway pressure | 4.7 |
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IVCdmax | 1.5 |
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Stroke VolumeVariation, SVV | 6.42 |
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the dispensability index of the inferior vena cava, dIVC | 5.28% |
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Pulse Pressure Variation, PPV | 6.32 |
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CVP | 9 |
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Pulse Pressure Variation | PEEP=0时，6.28；PEEP=5时，6.68；PEEP=10时，6.79；PEEP=15时，7.32. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，5.25%；PEEP=5时，6.32%；PEEP=10时，5.28%；PEEP=15时，5.02%. |
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CVP | PEEP=0时，10；PEEP=5时，10；PEEP=10时，12；PEEP=15时，12. |
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IVCdmax | PEEP=0时，1.52；PEEP=5时，1.83；PEEP=10时，1.83；PEEP=15时，1.88. |
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Mean airway pressure | PEEP=0时，4.8；PEEP=5时，10；PEEP=10时，15；PEEP=15时，21. |
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peak inspiratory pressure | PEEP=0时，13；PEEP=5时，21；PEEP=10时，23；PEEP=15时，29. |
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cardiac output | PEEP=0时，5.26；PEEP=5时，5.32；PEEP=10时，4.96；PEEP=15时，5.22. |
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Stroke VolumeVariation, SVV | PEEP=0时，6.38；PEEP=5时，6.88；PEEP=10时，6.06；PEEP=15时，7.17. |