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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 | 18.86% |
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Stroke VolumeVariation, SVV | 15.63 |
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IVCdmax | 1.48 |
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Mean airway pressure | 5.2 |
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peak inspiratory pressure | 15 |
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cardiac output | 4.46 |
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CVP | 5 |
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Pulse Pressure Variation, PPV | 16.43 |
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peak inspiratory pressure | PEEP=0时，15；PEEP=5时，19；PEEP=10时，25；PEEP=15时，27. |
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Mean airway pressure | PEEP=0时，5.2；PEEP=5时，8.9；PEEP=10时，13；PEEP=15时，20. |
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IVCdmax | PEEP=0时，1.48；PEEP=5时，1.52；PEEP=10时，1.68；PEEP=15时，1.75. |
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CVP | PEEP=0时，5；PEEP=5时，6；PEEP=10时，9；PEEP=15时，12. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，18.86%；PEEP=5时，16.48%；PEEP=10时，15.37%；PEEP=15时, 8.68%. |
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Pulse Pressure Variation | PEEP=0时，16.37；PEEP=5时,22.75；PEEP=10时，26.55；PEEP=15时，26.69. |
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Stroke VolumeVariation, SVV | PEEP=0时，15.6；PEEP=5时，18.3；PEEP=10时，20.28；PEEP=15时，24.43. |
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cardiac output | PEEP=0时，5.28；PEEP=5时,5.33；PEEP=10时，5.12；PEEP=15时，4.97. |