Vocal Cord Paralysis

A previous study completed in 2022 (NCT05158179) was conducted using cohorts of healthy controls, and adults with general laryngopharyngeal disorders. This study will expand on the previous research to include a separate cohort of adults being seen in clinic for an existing laryngopharyngeal disorder resulting from previous radiation or other cancer treatments.

This study aims to evaluate the role of single-dose 4-aminopyridine on the diagnosis of recurrent laryngeal nerve (RLN) paralysis. In addition, the investigational treatment will be used to test the hypothesis that 4-aminopyridine can speed the determination of nerve continuity after RLN injuries.

Investigators will assess the usefulness of using ultrasound in office procedures for laryngology interventions. Participants who qualify will be adults who are undergoing superior laryngeal nerve block, injection laryngoplasty, swallowing evaluation, voice evaluation and voice therapy.

The goal of this prospective, observational study is to evaluate for the presence of vocal fold motion impairment (VFMI) in the children admitted to the pediatric intensive care unit on noninvasive positive pressure ventilation (NIV PPV). Participants will have two ultrasounds of their vocal folds performed, once while on NIV PPV and once after weaned off of the NIV PPV. This results of these scans will be reviewed against one another and against the gold standard, fiberoptic nasolaryngoscopy (FNL). The main question this study aims to answer is: Can POCUS be used to reliably detect VFMI while pediatric patients on supported with NIV PPV?