Results: In 84 cases(128 times),the changes of physiological index were 72 times(59.4%),deterioration of primary disease was 34 times(24.6%),improper strategy of weaning was 22 times(15.9%).

• 结果:本组84例128例次脱机失败中；生理学指标变化72例次(59.；4%25)；原发病恶化34例次(24