On the other hand, in patients who failed to wean, SO2 decreased during weaning since oxygen transport did not increase enough in the face of the increased oxygen demand due to the increased work of breathing.

• 另一方面，脱机失败的病人，由于氧供没有增加到足以满足呼吸做功增加引起的氧耗增加,脱机期间的SO2降低。