Type II Thyroplasty Using New Titanium Bridge for Patients of Adductor Spasmodic Dysphonia

Suzuki Hirotaka, Nakamura Kazuhiro, Miura Reo, Kamatani Marin, Oshima Takeshi

doi:10.2468/jbes.71.239

<p>Type II thyroplasty is used as a treatment for adductor spasmodic dysphonia. The titanium bridge used in this surgery was first approved as a medical device in December 2017. The operative procedure is covered by Japanese national health insurance as laryngoplasty K400-3 (using a thyroid cartilage fixation device)，and it can be performed at medical institutions nationwide. Our department was an early adopter of this procedure in Japan, and since it was listed for insurance coverage in July 2018 we have performed it on 7 patients. We report that surgical experience here with a presentation of preoperative and postoperative voice findings and sound analysis. Significant improvements were seen postoperatively compared with preoperatively in the results of the voice handicap index, GRBAS scale, Mora method, and sound analysis. No serious adverse events were observed postoperatively. The advantages of type II thyroplasty are that it can be performed while conducting voice monitoring under local anesthesia, and that it is reversible, enabling readjustment if a problem occurs postoperatively. The long-term treatment effects have already been reported. In our cases the observation period was short, so we aim to continue follow-up observation. With good treatment outcomes and coverage by national health insurance, type II thyroplasty is predicted to spread nationwide in Japan as a general surgical treatment for adductor spasmodic dysphonia.</p>

Type II Thyroplasty Using New Titanium Bridge for Patients of Adductor Spasmodic Dysphonia

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