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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 | 2.88% |
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Stroke VolumeVariation, SVV | 6.78 |
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IVCdmax | 2.09 |
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Mean airway pressure | 5 |
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peak inspiratory pressure | 12 |
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cardiac output | 4.59 |
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CVP | 9 |
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Pulse Pressure Variation, PPV | 5.98 |
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peak inspiratory pressure | PEEP=0时，13；PEEP=5时，17；PEEP=10时，22；PEEP=15时，27. |
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Mean airway pressure | PEEP=0时，5.1；PEEP=5时，9.5；PEEP=10时，15；PEEP=15时，20. |
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IVCdmax | PEEP=0时，2.14；PEEP=5时，2.14；PEEP=10时，1.89；PEEP=15时，2.11. |
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CVP | PEEP=0时，10；PEEP=5时，12；PEEP=10时，13；PEEP=15时，16. |
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the dispensability index of the inferior vena cava, dIVC | PEEP=0时，2.84%；PEEP=5时，3.29%；PEEP=10时，7.21%；PEEP=15时，7.12%. |
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Pulse Pressure Variation | PEEP=0时，5.98；PEEP=5时，8.12；PEEP=10时，8.35；PEEP=15时，8.38. |
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Stroke VolumeVariation, SVV | PEEP=0时，6.75；PEEP=5时，7.33；PEEP=10时，6.67；PEEP=15时，7.18. |
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cardiac output | PEEP=0时，5.28；PEEP=5时，5；PEEP=10时，4.85；PEEP=15时，4.37. |