Although the slopes of HVR are not different between two group,Minute Ventilation(MV) in same SaO?2 are lower in HAP.

• 虽然低氧通气反应的斜率和对照组无明显差异，但通过血氧饱和度为70%25时的每分通气量进行比较，仍可发现低氧通气反应降低；