Features of respiratory impedance between COPD and OSAHS patients
- VernacularTitle:慢性阻塞性肺疾病及阻塞性睡眠呼吸暂停低通气综合征患者呼吸阻抗和睡眠呼吸紊乱的研究
- Author:
Feipeng CHEN
;
Zhaoxian YU
;
Xiaojun CHEN
;
Qiaohong PAN
- Publication Type:Journal Article
- Keywords:
Chronic obstructive pulmonary discase;
Obstructive sleep apnea hypopnca syndrome;
Overlap syndrome;
Airway impedance
- From:
Clinical Medicine of China
2008;24(9):855-857
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the characteristics of respiratory impedance in patients with chronic obstructive pulmonary disease (COPD),obstructive sleep apnea hypopnea syndrome (OSAHS).Methods The respiratory impedance were measured by Impulse Oscillometry(IOS) technique and polysomnography(PSG) were done synchronously in 11 COPD patients,15 OSAHS patients,4 overlap syndrome patients(COPD+OSAHS) and 10 control group. Results Zrs、R5、Rc and RP in COPD group,OSAHS group and COPD+OSAHS group were higer than those in contml group.Zrs、R5、R5-20、Fres.Rc and Rp in COPD group and COPD+OSAHS group were significantly higerthan those in OSAHS group.R20 and Rc in OSAHS group were higher than those in COPD group and control group (P<0.05).Rc in OSAHS group was still significantly higher than that in COPD group (P<0.05). The level of sleep efficiency was positive correlated with FEVl/pre% of COPD(r=0.632),while the levels of rouse frequence (r=-0.672),time of SaO2 <90% (-0.868) and ODI (-0.846) were negative correlated with FEVl/pre% of COPD.Condusion For OSAHS patients, there is some dysfunction in peripheral airway tract;For COPD patients,ODI and time of SaO2<90% are good index for the severity of disease.
