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[A preliminary clinical classification study in REM related obstructive sleep apnea].

Objective:The aim of this study is to introduce a method in classifying the REM related OSA (RrOSA) and the potential clinical significance. Method:Two hundred and fifty patients (male: 219) with OSAS diagnosed by polysomnographywere recruited in the study. The RrOSAS was defined as the ratio of AHIs in REM and non REM sleep (R) greater than one. In RrOSAS group, patients were divided into RrOSAS Ⅰa (R>2, NREM_AHI<15), RrOSAS Ⅰb (R>2, NREM_AHI>15), and RrOSAS II (2>R>1) three subtypes. Parameters of PSG, ESS, BMI and neck circufernces were obtained for further analysis. In RrOSA Ⅰa group, the efficiencies of CPAP and AutoPAP were investigated. Result:①There was a significant difference in gender between RrOSA and NRrOSA groups (P<0.05); ②There was no significant differences in ESS and BMI among the three subtypes of RrOSA (P>0.05); ③There was no significant difference in REM_AHI and REM_ODI between RrOSA and NRrOSA groups. Conclusion:The new method for the RrOSA classification helps better understanding the development of OSAS and might be useful in planning the CPAP treatment. RrOSA may be a special type of OSA, which may develop into other types as the condition develops.