Voice outcomes for patients undergoing surgery for obstructive sleep apnea: a systematic review and meta-analysis

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REVIEW ARTICLE

Voice outcomes for patients undergoing surgery for obstructive sleep apnea: a systematic review and meta‑analysis Murat Binar1   · Timur Akcam2 · Omer Suha Vardareli3 · Hakan Genc4 · Omer Karakoc4 Received: 7 February 2020 / Accepted: 29 May 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020

Abstract Purpose  To evaluate the effect of the different surgical techniques used in the treatment of obstructive sleep apnea (OSA) on the postoperative voice and nasalance, and to conduct a meta-analysis through the assessment of postoperative changes. Methods  Systematic literature review and meta-analysis of published data using the data sources, MEDLINE, Google Scholar, Cochrane, and SAGE. All studies published in English specifying any upper airway surgery for treatment of snoring and/or OSA were included, provided they indicated the pre- and postoperative mean ± standard deviation (SD) values for voice parameters and nasality. The primary outcomes were the changes in preoperative–postoperative mean values of fundamental frequency (mF0), jitter, shimmer, and nasalance scores. Results  After removal of duplications, 214 studies were potentially relevant, and 25 studies ultimately met the criteria for inclusion in the present review. Of the 25 studies evaluated in this review, 12 studies with 379 patients were available for the meta-analysis calculations. In general, a fixed-effects model was used to analyze the data in the subgroups. The metaanalysis results showed no significant differences in either subgroup analysis between the preoperative and postoperative assessments of mF0, jitter, shimmer, oral nasalance, nasal nasalance, and oronasal nasalance (All had values of p > 0.05). Conclusion  The results of this meta-analysis indicated no significant effect of surgical treatments for snoring or OSA on glottic functioning and nasalance parameters, regardless of surgery type. Further prospective studies are needed to assess more parameters for detailed acoustic analyses. Keywords  Snoring · Obstructive sleep apnea · Surgery · Voice · Nasalance · Meta-analysis

Introduction Obstructive sleep apnea (OSA) is one of the most common diseases worldwide. A simple PubMed search confirms this, as entering the keywords “obstructive sleep apnea” returns more than 30,000 articles. However, this disease is more than a simple sleep disorder, not only because of its * Murat Binar [email protected] 1



Department of Otolaryngology, Head and Neck Surgery, Medicana International Istanbul Hospital, Istanbul, Turkey

2



Department of Otolaryngology, Head and Neck Surgery, Istinye University Hospital, Liv Hospital Bahcesehir, Istanbul, Turkey

3

Department of Otolaryngology, Head and Neck Surgery, Loca Surgical Medical Center, Istanbul, Turkey

4

Department of Otolaryngology, Head and Neck Surgery, Gulhane Medical School, Ankara, Turkey



clinical properties (excessive daytime sleepiness, snoring, and impairment of the quality of life by poor sleep), but also because of its systemic comorbidities. Contin