Contralateral ansa cervicalis‐to‐recurrent laryngeal nerve anastomosis for unilateral vocal fold paralysis: A long‐term outcome analysis of 56 cases
- 25 April 2011
- journal article
- Published by Wiley in The Laryngoscope
- Vol. 121 (5), 1027-1034
- https://doi.org/10.1002/lary.21725
Abstract
Objectives/Hypothesis: To evaluate the long‐term efficacy of contralateral ansa cervicalis‐to‐recurrent laryngeal nerve (RLN) anastomosis for unilateral vocal fold paralysis (UVFP), when the ansa cervicalis on the side of the paralyzed vocal fold was absent or there was any question about its viability. Study Design: We retrospectively reviewed 56 consecutive cases of delayed laryngeal reinnervation with contralateral ansa cervicalis for UVFP. Methods: Between January 1996 and January 2008, a total of 56 UVFP patients were enrolled in this study. All patients underwent contralateral ansa cervicalis‐to‐RLN anastomosis. Videostroboscopy, acoustic analysis, perceptual evaluation and maximum phonation time (MPT), and laryngeal electromyography (LEMG) were performed pre‐ and postoperatively. Results: Analysis of videostroboscopic findings indicated that the glottic closure, vocal fold edge, vocal fold position, phase symmetry, and regularity were significantly improved (P < .001, post‐ vs. preoperative). Perceptual evaluation of dysphonia severity showed that overall grade, roughness, breathiness, asthenia, and strain were also significantly decreased postoperatively (P < .001). Postoperative values of jitter (local), shimmer (local), and mean noise‐to‐harmonics ratio were significantly lower than the corresponding preoperative values (P < .001). The postoperative MPT value was significantly longer than the preoperative one (P < .001). LEMG showed that there was a significant postoperative improvement in voluntary motor‐unit recruitment during phonation (P < .001). Conclusions: In cases with a lack of viable ansa cervicalis on the side of a paralyzed vocal fold, contralateral ansa cervicalis‐to‐RLN anastomosis is a feasible and effective approach in the treatment of UVFP and can restore physiologic laryngeal phonatory function.Keywords
This publication has 22 references indexed in Scilit:
- Improvement in phonation after reconstruction of the recurrent laryngeal nerve in patients with thyroid cancer invading the nerveSurgery, 2009
- Functional modulation of satellite cells in long-term denervated human laryngeal muscleThe Laryngoscope, 2009
- Effects of Long‐Term Denervation on the Rat Thyroarytenoid MuscleThe Laryngoscope, 2008
- Laryngeal ElectromyographyOtolaryngologic Clinics of North America, 2007
- Opposite Ansa Cervicalis to Recurrent Laryngeal Nerve Anastomosis to Restore Phonation in Patients with Advanced Thyroid CancerThe European Journal of Surgery, 2001
- Update: Laryngeal Reinnervation for Unilateral Vocal Cord Paralysis With the Ansa CervicalisThe Laryngoscope, 1996
- Cricoarytenoid Joint Mobility After Chronic Vocal Cord ParalysisThe Laryngoscope, 1996
- Effects of denervation on laryngeal muscles: A canine modelThe Laryngoscope, 1992
- Tierexperimentelle Untersuchungen zur kollateralen Reinnervation der denervierten laryngealen MuskulaturLaryngo-Rhino-Otologie, 1989
- Voice quality following laryngeal reinnervation by ansa hypoglossi transferThe Laryngoscope, 1986