Ten “push” and ten “pull” sessions were performed. Tilting of the VF was obtained by pulling or pushing the arytenoid cartilage with a mosquito forceps fixed to the stump of the previously sectioned superior tip of the posterior crico-arytenoid muscle allowing anterior and posterior tilting of the arytenoid cartilage in order to induce an elevation or a depression of the VF process. The right crico-arytenoid joint was posteriorly disarticulated. The tip of the video-endoscope was located in the laryngeal vestibule. Materials and methods: One fresh male human cadaver larynx, free of neurologic and anatomic disease, was explored with the LR system through the operative channel of a flexible gastroenterology video-endoscope. This study represents a proof of concept regarding the use of the LR in assessing VF relative positions in the vertical plane. The larynx ruler (LR) is a laser-based measuring device that could meet the previously stated need, using a flexible endoscope.
Presently, there is no easily applicable medical device allowing noninvasive, office-based measurement of the relative vertical position of the VFs. This air leakage can be in the horizontal plane and in the vertical plane. Introduction: Glottic leakage during phonation is a direct consequence of unilateral vocal fold (VF) paralysis. Gauthier Desuter, 1,2 Benjamin Mertens, 3 Alain Delchambre, 3 Julie van Lith-Bijl, 1,4 Peter Paul van Benthem, 2 Elisabeth Sjögren 2ġOtolaryngology, Head & Neck Surgery Department, Voice & Swallowing Clinic, Cliniques universitaires Saint-Luc, Université catholique de Louvain, Brussels, Belgium 2Otolaryngology, Head & Neck Surgery Department, LUMC, University of Leiden, Leiden, the Netherlands 3BEAMS Department, Ecole Polytechnique de Bruxelles, Université libre de Bruxelles, Brussels, Belgium 4Otolaryngology Department, Flevoziekenhuis, Almere, the Netherlands
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