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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 | 12.2% |
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Stroke VolumeVariation, SVV | 10.25 |
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IVCdmax | 2.09 |
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Mean airway pressure | 4.8 |
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peak inspiratory pressure | 9 |
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cardiac output | 5.38 |
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CVP | 6 |
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Pulse Pressure Variation, PPV | 7.9 |
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peak inspiratory pressure | PEEP=0时，9；PEEP=5时，20；PEEP=10时，23；PEEP=15时，28. |
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Mean airway pressure | PEEP=0时，4.8；PEEP=5时，10；PEEP=10时，14；PEEP=15时，17. |
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IVCdmax | PEEP=0时，2.13；PEEP=5时，2.05；PEEP=10时，2.08；PEEP=15时，2.17. |
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CVP | PEEP=0时，6；PEEP=5时，8；PEEP=10时，8；PEEP=15时，12. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，12.18%；PEEP=5时，10.66%；PEEP=10时，8.16%；PEEP=15时，7.86%. |
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Pulse Pressure Variation | PEEP=0时，7.88；PEEP=5时，6.79；PEEP=10时，7.25；PEEP=15时，8.28. |
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Stroke VolumeVariation, SVV | PEEP=0时，10.17；PEEP=5时，12.2；PEEP=10时，15.13；PEEP=15时，12.28. |
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cardiac output | PEEP=0时，6.32；PEEP=5时，5.78；PEEP=10时，5.37；PEEP=15时，4.78. |