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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 | 20.34% |
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Stroke VolumeVariation, SVV | 18.72 |
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IVCdmax | 1.62 |
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Mean airway pressure | 4.9 |
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peak inspiratory pressure | 14 |
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cardiac output | 4.34 |
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CVP | 5 |
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Pulse Pressure Variation, PPV | 17.82 |
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peak inspiratory pressure | PEEP=0时，14；PEEP=5时，17；PEEP=10时，24；PEEP=15时，28. |
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Mean airway pressure | PEEP=0时，4.9；PEEP=5时，4.9；PEEP=10时，8.8；PEEP=15时，12. |
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IVCdmax | PEEP=0时，1.62；PEEP=5时，1.78；PEEP=10时，1.88；PEEP=15时，1.96. |
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CVP | PEEP=0时，5；PEEP=5时，5；PEEP=10时，9；PEEP=15时，12. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，20.34%；PEEP=5时，21.74%；PEEP=10时，16.28%；PEEP=15时，16%. |
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Pulse Pressure Variation | PEEP=0时，17.78；PEEP=5时，24.32；PEEP=10时，23.38；PEEP=15时，24.73. |
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Stroke VolumeVariation, SVV | PEEP=0时，18.66；PEEP=5时，18.3；PEEP=10时，22.75；PEEP=15时，26.17. |
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cardiac output | PEEP=0时，5.14；PEEP=5时，4.95；PEEP=10时，4.83；PEEP=15时，4.38. |