头位及体位对无鼾人群用力吸气流量的影响

目的 探讨无鼾人群的用力吸气流量（forced inspiratory airflow, FIF）是否受到头位及体位变化的影响，为阻塞性睡眠呼吸暂停综合征（obstructive sleep apnea syndrome, OSAS）患者的睡眠体位提供参考。方法 通过氧减饱和指数测量结果筛选出15名无鼾人群，在下颌正中位和下颌前伸位分别进行下列5种头位及体位的FIF测量：直立位、仰卧位、侧卧位、仰卧-头偏转位和俯卧-头偏转位。测量数据进行单因素方差分析和配对t检验，各项分析的检验水准均为α=0.05。结果 在下颌正中位和下颌前伸位，直立位均比其他4种头位及体位获得更高的FIF。在其他4种头位及体位中，仰卧-头偏转位可以得到相对较高的FIF。相同头位和体位下，下颌正中位和下颌前伸位的FIF没有统计学差异。结论 在无鼾人群的各种睡眠体位中，仰卧-头偏转位可以获得较高的FIF，改善气道通气，此头位和体位可以作为OSAS患者的参考睡眠体位。

Effects of head and body positions on forced inspiratory airflow in non-apnea subjects

Objective To evaluate whether forced inspiratory airflow（FIF） was affected by changing head and body positions of non- apnea subjects and to offer better sleeping position for patients with obstructive sleep apnea syndrome （OSAS）. Methods 15 non-ap- nea subjects were selected according to results of the oxygen desaturation index. Each subject had FIF measured separately when the jaw was in normal position and forward position and when the head and body were in the following 5 different positions： upright, su- pine, lateral, supine-head rotation and prostrate-head rotation. The results were analyzed by one-way analysis of variance and paired t- test with ct = 0. 05. Results The patients had significant higher FIF values in upright position than in the other 4 head and body posi- tions when the jaw was in normal position and forward position. Among the other 4 head and body positions ,＇ supine-head rotation posi- tion made patients obtain higher FIF values. In the same head and body positions, there was no significant difference in FIF value when the jaw was in normal position and in forward position. Conclusions Among different sleep positions of non-apnea subjects, the posi- tion of supine-head rotation can make patients obtain higher FIF values and improve the airway ventilation. This position may be consid- ered referendial sleep position for the OSAS patients.