PHARYNGEAL AIRWAY VOLUME FOLLOWING ...

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Pharyngeal airway volume was measured at three time points: T0 (pre-surgery), T1 (2-3 months post-surgery), and T2 (4-12 months post-surgery, mean = 7 months). 18 patients had data for all three time points, 29 patients only had data at T0 and T1, and 8 patients only had data at T0 and T2. CBCT scans were analyzed using V-Works 4.0 3D software (CyberMed Inc., Seoul, Korea) and the beta version of Dolphin 3D (Chatsworth, CA). Isolating the Pharyngeal Airway and Volumetric Measurements Volumetric data was obtained after importing images into V-Works 4.0 and isolating the pharyngeal airway space, which included the oropharynx and a portion of the nasopharynx (Figure 3.1). The anterior border was comprised of the posterior soft palate and base of the tongue. The superior/anterior border was defined by a line created from PNS to sella (S), and the superior border was a line along the inferior border of the body of the sphenoid bone. The posterior border was the posterior pharyngeal wall. The inferior border was a line created from the tip of the epiglottis perpendicular to the posterior pharyngeal wall. After the pharyngeal airway was isolated from the surrounding tissues, the total airway volume of the sculpted airway (Figure 3.2) was calculated. 30
Line from Sella to PNS Posterior of Soft Palate Posterior of Tongue Figure 3.1: Borders of Measured Pharyngeal Airway 31 Sella PNS Line at Inferior Border of Sphenoid Bone Posterior Pharyngeal Wall Line at Tip of Epiglottis
Page 1 and 2: PHARYNGEAL AIRWAY VOLUME FOLLOWING
Page 3 and 4: PHARYNGEAL AIRWAY VOLUME FOLLOWING
Page 5 and 6: ACKNOWLEDGEMENTS I would like to th
Page 7 and 8: LIST OF TABLES Table 3.1: Descripti
Page 9 and 10: CHAPTER 1: INTRODUCTION Combined or
Page 11 and 12: CHAPTER 2: REVIEW OF THE LITERATURE
Page 13 and 14: the posterior pharyngeal wall, 2 or
Page 15 and 16: mask discomfort, nasal dryness, and
Page 17 and 18: Tongue-Reduction Procedures Other s
Page 19 and 20: structures causes the airway muscle
Page 21 and 22: after surgery, the upper retropalat
Page 23 and 24: skeletal tissues, soft tissues, and
Page 25 and 26: Literature Cited 1. Schwab RJ, Gold
Page 27 and 28: 19. Wittels EH, Thompson S. Obstruc
Page 29 and 30: 37. Li KK, Guilleminault C, Riley R
Page 31 and 32: CHAPTER 3: JOURNAL ARTICLE Abstract
Page 33 and 34: patients often have elongated soft
Page 35 and 36: subsequent to orthognathic surgery
Page 37: years. Females had a mean age of 28
Page 41 and 42: Line from Maxillary Incisor to Post
Page 43 and 44: counterclockwise rotation of the ma
Page 45 and 46: Table 3.1: Descriptive Statistics f
Page 47 and 48: Volume (cubic mm) 30000.00 25000.00
Page 49 and 50: percent change from T0 to T2 (r=.55
Page 51 and 52: surrounding soft tissues encroachin
Page 53 and 54: the pre-surgical values, but there
Page 55 and 56: Conclusions 1. In this study, patie
Page 57 and 58: 10. Lyberg T, Krogstad O, Djupeslan
Page 59 and 60: 27. Li KK, Powell NB, Riley RW, Tro

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