Chipps B E, Mak H, Schuberth K C, Talamo J H, Menkes H A, Scherr M S
Pediatrics. 1980 Jun;65(6):1157-60.
At sea level, it appears that oxygen desaturation does not occur in normal children at night and that the desaturation that occurs in moderately severe asthmatic children with therapeutic levels of theophylline does not approach dangerously low levels.
在海平面高度，正常儿童夜间似乎不会出现氧饱和度降低的情况，而且接受治疗剂量茶碱的中度重症哮喘儿童所出现的氧饱和度降低并未达到危险的低水平。
