Morphological Assessment of the Soft Palate in Habitual Snoring Using Image Analysis (original) (raw)

Objectives: Define differences in palatal and uvular dimensions between habitual snorers and healthy nonsnoring control subjects. Document the changes in palatal configuration after different types of palatoplasty. Study Design: A prospective controlled clinical study was performed analyzing video recordings of the soft palate and oropharynx of 251 subjects (121 habitual snorers, 79 patients after laser-assisted uvulopalatoplasty ([LAUP], and 51 healthy volunteers). Methods: The recordings were captured using a rigid endoscope with a reference measure applied to the soft palate and a mark at the junction of the soft and hard palate. Four parameters were studied in the captured pictures after correction for the distortion deformity in fiberoptic endoscopic images: 1) length of soft palate, 2) length of uvula, 3) width of uvula, and 4) distance between posterior pillars. Results: Analysis showed that habitual snorers, compared with healthy volunteers have significantly increased soft palate length (P = .OOOOl), increased uvula length (P = .OO02) and width (P = .00001), and narrowed oropharyngeal isthmus (distance between the posterior pillars) (P = .M). In patients studied after LAUP, the length of the soft palate is significantly shorter (P = .OOOOl) than in the preoperative cohort, and the oropharyngeal isthmus is significantly narrower (P = .00001). Moreover, this latter distance is significantly narrower (P = .OOOOl) when compared with healthy volunteers. Conclusions: Habitual snorers have a long soft palate, a long wide uvula, and a narrowed oropharyngeal isthmus. LAUP shortens and tightens the elongated palate and causes a further reduction in the space between the posterior pillars.