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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 | 16.75% |
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Stroke VolumeVariation, SVV | 14.85 |
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IVCdmax | 1.37 |
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Mean airway pressure | 5.7 |
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peak inspiratory pressure | 16 |
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cardiac output | 4.88 |
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CVP | 5 |
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Pulse Pressure Variation, PPV | 13.67 |
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peak inspiratory pressure | PEEP=0时，16；PEEP=5时，20；PEEP=10时，28；PEEP=15时，31. |
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Mean airway pressure | PEEP=0时，5.7；PEEP=5时，9.6；PEEP=10时，15；PEEP=15时，22. |
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IVCdmax | PEEP=0时，1.39；PEEP=5时，1.45；PEEP=10时，1.62；PEEP=15时，1.88. |
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CVP | PEEP=0时，5；PEEP=5时，8；PEEP=10时，10；PEEP=15时，15. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，16.75%；PEEP=5时，15.36%；PEEP=10时，14.77%；PEEP=15时，8.98%. |
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Pulse Pressure Variation | PEEP=0时，13.67；PEEP=5时，17.66；PEEP=10时，24.18；PEEP=15时，22.75. |
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Stroke VolumeVariation, SVV | PEEP=0时，14.8；PEEP=5时，15.7；PEEP=10时，16.38；PEEP=15时，19.43. |
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cardiac output | PEEP=0时，5.75；PEEP=5时，5.42；PEEP=10时，5.18；PEEP=15时，5.05. |