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  • Title: Sphincter pharyngoplasty: a preoperative and postoperative analysis of perceptual speech characteristics and endoscopic studies of velopharyngeal function.
    Author: Witt PD, D'Antonio LL, Zimmerman GJ, Marsh JL.
    Journal: Plast Reconstr Surg; 1994 May; 93(6):1154-68. PubMed ID: 8171135.
    Abstract:
    Perceptual speech and endoscopic evaluations were videotaped preoperatively and postoperatively for 20 patients who underwent sphincter pharyngoplasty. Randomized videotapes of these evaluations were rated by clinicians experienced in assessment of patients with velopharyngeal dysfunction. Results of perceptual speech ratings showed that nasal resonance following sphincter pharyngoplasty improved in 79 percent of patients (p = 0.006), frequency of nasal emission decreased in 74 percent (p = 0.018), and severity of emission decreased in 79 percent (p = 0.006). Rating of the overall change in speech quality was not statistically greater than chance (p = 0.41). Thirty percent of patients were judged to be hyponasal postoperatively, while none had been preoperatively. Results of endoscopic evaluations showed that 75 percent of patients had a quantitative decrease in orifice size (p = 0.013). Despite improved velopharyngeal function, 65 percent of patients were still considered candidates for additional surgical management postoperatively. While sphincter pharyngoplasty resulted in improved perceptual speech characteristics and velopharyngeal function, only 18 percent of patients showed complete resolution of hypernasality and nasal emission, and only 35 percent demonstrated complete velopharyngeal closure postoperatively.
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