APrevent Vocal Implant System (VOIS) for Adjustable Treatment of Unilateral Vocal Fold Paralysis (UVFP)

Inclusion Criteria: * Male and female patients between 18 and 80 years * Diagnosed with permanent UVFP and insufficient glottal closure and planned type I thyroplasty with conventional implant * Ability to co-operate with the investigator and to comply with the requirements of the entire study Exclusion Criteria: * Any other significant disease or disorder which, in the opinion of the investigator, may either put the participant at risk because of participation in the clinical investigation may influence the result of the clinical investigation, or the participant's ability to participate in the clinical investigation * Scheduled elective surgery or other procedures requiring general anaesthesia during clinical investigation * Had medialization thyroplasty before * Had injection medialization laryngoplasty in the past two years. * Presence of structural vocal fold lesions such as polyp or nodules * Status post total cordectomy * Previous laryngeal framework surgery (any type of thyroplasty, arytenoid adduction) * Significant non-laryngeal speech abnormality (severe dysarthria determined by a panel of trained speech therapists) * Severe coagulopathy