Fractal quantitative endoscopic evaluation of the upper airway in patients with obstructive sleep apnea syndrome

Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery
Alexander Delides, Alexandros Viskos

Abstract

To analyze computer-assisted quantitative measurements of endoscopic images taken during fiberoptic nasopharyngoscopy with Müller's maneuver that were processed with the use of fractal geometry and correlate them with the apnea-hypopnea index of patients with obstructive sleep apnea syndrome as well as habitual snorers. Diagnostic test assessment for the analysis of images acquired through fiberoptic nasopharyngoscopy with Müller's maneuver and processed with the use of fractal geometry. Sleep laboratory in a tertiary care private hospital in Athens, Greece. A total of 42 subjects (25 patients, 17 control subjects) underwent fiberoptic endoscopic nasopharyngoscopy with Müller's maneuver and polysomnographic overnight testing. Endoscopic images were digitally analyzed, and fractal analysis software was used to determine fractal dimensions of postpalatal airway contour during quiet inspiration and Müller's maneuver. Findings were correlated with the apnea-hypopnea index. Fractal dimension of collapsed airway and airway collapsibility was shown to be correlated with the apnea-hypopnea index (r = -0.481 and 0.518). We used 9.5 percent airway collapsibility on the basis of fractal dimensions as a cutoff (decided according to a recei...Continue Reading

References

Jul 1, 1989·The Laryngoscope·G P KatsantonisJ K Walsh
Sep 18, 2004·Clinical Otolaryngology and Allied Sciences·P P HsuR L Blair
Oct 22, 2005·American Journal of Respiratory and Critical Care Medicine·Julian J ArmstrongPeter R Eastwood
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Dec 7, 2007·Sleep Medicine Reviews·Boris A Stuck, Joachim T Maurer

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Citations

Jun 15, 2011·Journal of Huazhong University of Science and Technology. Medical Sciences = Hua Zhong Ke Ji Da Xue Xue Bao. Yi Xue Ying De Wen Ban = Huazhong Keji Daxue Xuebao. Yixue Yingdewen Ban·Ying XiaoWeijia Kong
Sep 15, 2012·The Journal of Craniofacial Surgery·Hasan TanyeriCaglar Cuhadaroglu
Nov 19, 2011·Journal of Veterinary Internal Medicine·M S ZaidA S Mosenco
Apr 13, 2015·Redox Biology·Dean P Jones

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Software Mentioned

SPSS
Fractal Dimension Calculator
Gimp

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