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Drug-Induced Sleep Endoscopy (DISE) with Target Controlled Infusion (TCI) and Bispectral Analysis in Obstructive Sleep Apnea
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Tongue shape in obstructive sleep apnea patients.

E K Pae1, A A Lowe

  • 1Department of Orthodontics, The University of Connecticut Health Center, USA. pae@up.uchc.edu

The Angle Orthodontist
|May 5, 1999
PubMed
Summary
This summary is machine-generated.

Obstructive sleep apnea (OSA) patients show distinct tongue shapes compared to non-apneic individuals. Eigenshape analysis of cephalograms in the supine position can effectively differentiate between these groups.

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Area of Science:

  • Medical Imaging
  • Sleep Medicine
  • Biomedical Engineering

Background:

  • Clinical observations suggest potential differences in tongue morphology between individuals with obstructive sleep apnea (OSA) and healthy subjects.
  • Quantifying these subtle shape variations presents a challenge due to the difficulty in establishing consistent anatomical landmarks on the tongue.

Purpose of the Study:

  • To investigate and determine if significant differences in tongue shape exist between OSA patients and non-apneic individuals.
  • To evaluate the utility of eigenshape analysis as a method for distinguishing between these groups.

Main Methods:

  • Employed eigenshape analysis, a morphometric technique that converts tongue contour data into numerical representations (tangent angles).
  • Utilized cephalograms from 80 male patients, analyzed in both upright and supine positions.
  • Subjects were categorized into four groups based on OSA symptom severity.

Main Results:

  • Graphical comparison of tongue shape variations in the supine position revealed clear distinctions between the non-apneic group and the OSA groups.
  • The eigenshape analysis successfully differentiated tongue shape patterns associated with OSA.

Conclusions:

  • Eigenshape analysis applied to cephalograms in the supine position appears to be a valuable tool for differentiating OSA subjects from non-apneic individuals.
  • This technique offers a reproducible method for assessing tongue shape variations relevant to OSA diagnosis.