Journal of Jilin University Medicine Edition ›› 2015, Vol. 41 ›› Issue (05): 990-993.doi: 10.13481/j.1671-587x.20150520

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Changes of pharyngeal critical pressure in obese adolescents with obstructive sleep apnea syndrome and its clinical significance

YUAN Haibo1, ZHANG Zhengjiao2, ZHANG Yanqiu3, PENG Liping1, HUA Shucheng1   

  1. 1. Department of Respiratory Medicine, First Hospital, Jilin University, Changchun 130021, China;
    2. Department of Neurology, People's Hospital, Jilin Province, Changchun 130021, China;
    3. Conduit Room, Department of Cardiovascular Medicine, Second Hospital, Jilin University, Changchun 130041, China
  • Received:2015-04-06 Online:2015-09-28 Published:2015-09-29

Abstract:

Objective To observe the changes of pharyngeal critical pressure (Pcrit) in the obese adolescents with obstructive sleep apnea syndrome (OSAS),and to investigate the role of Pcrit in the pathogenesis of OSAS in the adolescents. Methods According to the results from polysomnography and body mass index (BMI) measurements,the subjects were divided into obese OSAS group (n=16),obese control group (n=18),and lean control group (n=17).On the base of polysomnography monitoring,the slope of pressure-flow curve and Pcrit were observed by pressure-flow relationship technology.Then the relationship between Pcrit and apnea hypopnea index (AHI) was analyzed. Results The slope of pressure-flow curve and Pcrit of patients in obese OSAS group were significantly higher than those in obese control group and lean control group (P<0.01);the Pcrit of objects in obese control group was lower than that in lean control group (P<0.05).In obese OSAS group,the positive correlation was found between the slope of pressure-flow curve and AHI (r=0.789,P=0.005),as well as Pcrit and AHI (r=0.654,P=0.032). Conclusion The increase of Pcrit is one of the reasons for upper airway obstruction in the obese adolescents with OSAS.To maintain Pcrit is important for the obese adolescents without OSAS to protect the upper airway from occlusion.

Key words: adolescent, obstructive sleep apnea syndrome, pharyngeal critical pressure

CLC Number: 

  • R562