不同负压吸痰对先天性心脏病合并肺动脉高压患儿血氧饱和度的影响

Impact of sputum suctioning under different pressures on SpO_2 of children with congenital heart diseases and pulmonary arterial hypertension

目的探讨不同负压吸痰对先天性心脏病(CHD)合并肺动脉高压(PH)患儿血氧饱和度(SpO2)的影响。方法将CHD合并PH患儿按适时吸痰时间顺序随机分第1组、第2组、第3组、第4组,四组患儿吸痰负压分别为13.3～19.9kPa、20.0～26.5kPa、26.6～33.2kPa、33.3～40.0kPa。结果不同负压吸痰对CHD合并PH患儿的SpO2均有影响,第2组、第3组较第1组、第4组SpO2更稳定(P<0.05);第1组痰液吸尽所需时间更长(P<0.01),第1组痰液吸尽所需次数更多。结论CHD合并PH患儿吸痰负压宜选择20.0～33.2kPa,以保证SpO2相对稳定。

Objective To investigate effects of sputum suctioning under different pressures on SpO2 of children with congenital heart disease （CHD） and pulmonary arterial hypertension （PH）. Methods Children with CHD and PH were randomly divided into 4 groups and received sputum suctioning under such pressures as 13.3-19.9 kPa （group 1）, 20.0-26.5 kPa （group 2）, 26.6-33.2 kPa （group 3）, and 33.3-40.0 kPa （group 4） respectively. Results SpO2 of children was affected by pressures used for sputum suc tioning, and it was more stable in group 2 and 3 than group 4 and 1 during suctioning （P〈0.05） ; group 1 required the longest time for each suctioning and more suctioning frequency. Conclusion Sputum suctioning performed on children who suffered CHD and PH should be operated under the pressure of 20.0-33.2 kPa, which can result in relatively stable SpO2.