title: [The analysis of correlation between tongue body MRI and upper airway pressure measurements of blocked lingual region in patients with moderate and severe OSAHS].
abstract: OBJECTIVE
  To investigate the correlation between tongue body MRI measurements and the lingual region obstruction in patients with obstructive sleep apnea hypopnea syndrome (obstructive sleep apnea hypopnea syndrome, OSAHS), and the relationship of two diagnosis methods in positioning obstructive level, in order to improve the preoperative diagnostic accuracy of obstructive level in OSAHS patients .
  
  
  METHODS
  Fifty-nine patients with OSAHS definited by the AG200 sleep apnea monitoring and obstruction plane positioning system was included. They all underwent tongue MRI scan, after three-dimensional reconstruction, the tongue body length to diameter, relative thickness, basal diameter, wide around central about wide diameter and tongue body volume were measured. The lower blocking (mainly composed of lingual region) constituent ratio P established by AG200 was correlated with tongue parameters measured by MRI. At the same time, To analysis of differences of P in patients with different degree of OSAHS.
  
  
  RESULTS
  Among these patients with OSAHS in different degree, the coefficient correlation between tongue parameters(tongue length, relative thickness, basal diameter, wide middle diameter, tongue body volume) and lower blocking constitute ratio P werer LP = 0.051,rHP = 0.069, r1 = 0.215, r2 = 0.147, rVP = 0.259, respectively. lower obstruction of form than the differences had statistical significance. The measured tongue parameters and value P(the lower blocking constituent ratio) were negatively correlated, which demonstrated that exclusing of the larynx and hypopharynx airway obstruction, the lower airway obstruction detected by AG200 was related with tongue parameters measured by MRI, and was strongestly related with the tongue body volume.
  
  
  CONCLUSIONS
  The volume of tongue and AG had correlation in judgement of lower blocking. In OSAHS patients the lower blocking constituent ratio varies between the defferent severity groups of the disease, the combina tion of the two method can be used to predict the obstructive plane in OSAHS patients with upper airway obstruction, and provide the basis for the individual treatment of patients with OSAHS.
authors.forename: Guofeng
authors.initials: G
authors.lastname: Xiong
authors.forename: Jianwen
authors.initials: J
authors.lastname: Hu
authors.forename: Weijun
authors.initials: W
authors.lastname: Chen
authors.forename: Yimin
authors.initials: Y
authors.lastname: Zeng
authors.forename: Wenlong
authors.initials: W
authors.lastname: Zheng
mesh_terms: D000402:Airway Obstruction / Q000150:complications*; D006801:Humans; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D012890:Sleep; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis*; D014059:Tongue / Q000473:pathology*