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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 | 10.36% |
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Stroke VolumeVariation, SVV | 7.72 |
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IVCdmax | 1.76 |
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Mean airway pressure | 5 |
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peak inspiratory pressure | 9 |
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cardiac output | 4.39 |
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CVP | 6 |
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Pulse Pressure Variation, PPV | 8.58 |
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peak inspiratory pressure | PEEP=0时，9；PEEP=5时，19；PEEP=10时，23；PEEP=15时，28. |
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Mean airway pressure | PEEP=0时，5；PEEP=5时，9；PEEP=10时，15；PEEP=15时，19. |
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IVCdmax | PEEP=0时，1.76；PEEP=5时，1.98；PEEP=10时，2.12；PEEP=15时，2.2. |
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CVP | PEEP=0时，7；PEEP=5时，10；PEEP=10时，11；PEEP=15时，14. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，10.36%；PEEP=5时，10.12%；PEEP=10时，8.98%；PEEP=15时，8.17%. |
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Pulse Pressure Variation | PEEP=0时，8.43；PEEP=5时，8.93；PEEP=10时，10.34；PEEP=15时，11.49. |
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Stroke VolumeVariation, SVV | PEEP=0时，7.67；PEEP=5时，9.3；PEEP=10时，10.17；PEEP=15时，12.34. |
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cardiac output | PEEP=0时，5.78；PEEP=5时，5.36；PEEP=10时，5.15；PEEP=15时，5.1. |