Related Experiment Video
Updated: Nov 24, 2025

Identification and Protection of the Recurrent Laryngeal Nerve during Transoral Robotic Thyroidectomy
Published on: October 24, 2025
Novel voice prosthesis after total laryngectomy with laryngoplasty reconstruction
Allen L Feng1, Joseph Zenga2, Mark A Varvares3
1Department of Otolaryngology - Head and Neck Surgery, University of Michigan, Ann Arbor, Michigan, USA.
Background:
Although many patients achieve serviceable speech after total laryngectomy (TL), others are limited by un-naturally low pitch. We describe a cadaveric study to provide proof of concept for a novel voice prosthesis after TL with free tissue laryngoplasty.
Methods:
Devices were implanted into fresh frozen cadavers after TL and free tissue laryngoplasty. Phonation pressures were measured using a custom Blom-Singer Manometer (InHealth Technologies, Carpinteria, CA) and acoustic files were analyzed using Praat, a speech analysis software.
Results:
Two fresh frozen cadavers were implanted with the voice prosthesis. Both prostheses demonstrated appropriate stenting of the laryngoplasty. Successful sound production was achieved after airflow generation at the proximal trachea. An average phonation pressure of 3.5 cmH2 O (SD 1.7 cmH2 O) was necessary to generate a sound intensity of 80.6 dB (SD 0.2 dB) at an average fundamental frequency of 299.5 Hz (SD 112.6 Hz).
Conclusions:
The novel voice prosthesis described herein offers a feasible voice generation mechanism.
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