Functional Voice Disorder Clinical Trial
Official title:
Which Instrumental Acoustic Voice Parameters Indicate Vocal Improvement After Voice Therapy in Patients With Functional Dysphonia
Verified date | May 2016 |
Source | University of Zurich |
Contact | n/a |
Is FDA regulated | No |
Health authority | Switzerland: Ethikkommission |
Study type | Observational |
In a retrospective analysis of already existing clinical assessment data from patients with
functional voice disorders the following aspects will be sampled, encoded and analysed:
Outcomes pre and post treatment of
1. subjective voice symptoms measured by Voice Handicap Index (VHI-9i),
2. perceptual voice symptoms according to Grading-Roughness-Breathiness-Asthenia-Strain
Scale (GRBAS Scale),
3. instrumental acoustic analysis parameters Jitter (%), speaking voice profile: mean and
range of speaking pitch and intensity, max. intensity and mean pitch of calling voice,
singing voice: min./max. and range of pitch and intensity, maximum phonation time,
Dysphonia Severity Index (DSI).
Status | Completed |
Enrollment | 50 |
Est. completion date | December 2015 |
Est. primary completion date | December 2015 |
Accepts healthy volunteers | No |
Gender | Both |
Age group | 20 Years to 70 Years |
Eligibility |
Inclusion Criteria: - informed consent; patients 20 to 70 years with functional voice disorder; -diagnostics and voice therapy at University Hospital Zurich; - full pre- and post treatment voice assessment (videostroboscopy, subjective self- assessment, instrumental acoustic and perceptual analysis). Exclusion Criteria: - known neurologic and psychiatric disease, - hearing disorder, - surgery of the head and neck area or intubation (for any reason) in last 18 months. |
Observational Model: Cohort, Time Perspective: Retrospective
Country | Name | City | State |
---|---|---|---|
Switzerland | Clinic for Otorhinolaryngology University Hospital Zurich | Zurich | ZH |
Lead Sponsor | Collaborator |
---|---|
University of Zurich |
Switzerland,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Instrumental acoustic voice parameters | Instrumental acoustic parameters are determined by a computer-assisted analysis of voice recordings. In the present study the following parameters are measured before and after voice therapy: Jitter % (deviation of fundamental frequency), mean and range of speaking pitch and intensity, maximum intensity and mean pitch of calling voice, minimum and max. and range of pitch and intensity of the singing voice, and the composite measure Dysphonia Severity Index (DSI). | Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) | No |
Secondary | Subjective voice symptoms | Subjective voice symptoms are measured before and after voice therapy by the patient questionnaire "Voice Handicap Index" (VHI-9i). | Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) | No |
Secondary | Perceptual voice symptoms | Perceptual (hearable) voice symptoms are determined by the examiner before and after voice therapy using GRBAS Scale (Grading-Roughness-Breathiness-Asthenia-Strain Scale). | Before (initial diagnosis) and after voice therapy, expected average of 11-20 weeks after initial diagnosis) | No |
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