Comparison of long-term hearing results after vestibular neurectomy, endolymphatic mastoid shunt, and medical therapy.

Objective: This study aimed to compare the hearing changes in the long term after vestibular neurectomy, endolymphatic mastoid shunt, and medical treatment in classic Meniere's disease. Study Design: A retrospective case review was conducted based on audiologic follow-up between 5 and 21 years. Setting: The study was performed at two centers in Bari University Hospital, one performing vestibular neurectomy as the first surgical procedure for Meniere's disease and the other, endolymphatic mastoid shunt. Patients and Interventions: Of 68 patients with intractable idiopathic Meniere's disease, 29 underwent middle fossa vestibular neurectomy, and 17 had endolymphatic mastoid shunt; 22 were offered surgery but declined. Main Outcome Measures: Outcome measures were pure-tone average (PTA), speech reception threshold, and speech discrimination score before and after treatment. Results: PTA declined by an average of 9.3 dB in neurectomy patients, 13.3 dB in patients undergoing endolymphatic mastoid shunt, and 18.1 dB in patients who were offered surgery but declined. Patients were subdivided into two cohorts based on their preoperative or initial PTA. In the patients who had PTA scores worse than 50 dB initially, the PTA declined an average of 4.3 dB in the vestibular neurectomy group, 11.5 dB in the endolymphatic sac group, and 4 dB in the nonsurgical group. In the patients with PTA ≥50 dB initially, the PTA declined an average of of 25.3 dB in the vestibular neurectomy group. 16.1 in the endolymphatic sac group, and 26.2 dB in the nonsurgical group. Although shunt patients with good hearing initially deteriorated less than neurectomy patients and less than patients who declined surgery, the difference was not significant. Conclusions: These results indicate that patients with poor hearing stabilized, while patients with good hearing continued to deteriorate. The same conditions were observed in the patients who had surgery and those who were offered surgery but declined.