Laryngeal Vibration for Spasmodic Dysphonia (SD-VTS)
Spasmodic Dysphonia
About this trial
This is an interventional treatment trial for Spasmodic Dysphonia focused on measuring Dystonia, Spasmodic dysphonia, Laryngeal dystonia
Eligibility Criteria
Inclusion Criteria:
- diagnosis of adductor SD for a minimum of 6 months with documented symptom relief after botox injection
Exclusion Criteria:
- abductor SD
- patients with other voice disorders such as muscle tension dysphonia that share some of the symptomology with SD
Sites / Locations
- University of Minnesota
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Experimental
Active Comparator
Active Comparator
Low-High Treatment
High-Low Treatment
Low-High Comparator
High-Low Comparator
Participants in the low-high treatment group will receive Laryngeal Vibration (Treatment) at 100Hz frequency once a week for a duration of 4 weeks (low intensity). Then they will switch and receive laryngeal vibration at 100Hz frequency every second day of the week (high intensity) for a duration of 4 weeks.
Participants in the high-low treatment group will receive Laryngeal Vibration (Treatment) at 100Hz frequency every second day of the week for a duration of 4 weeks (high intensity). Then they will switch and receive laryngeal vibration at 100Hz frequency once a week for a duration of 4 weeks (low intensity).
Participants in the low-high comparator group will receive Laryngeal Vibration (Comparator) at 5Hz frequency once a week for a duration of 4 weeks (low intensity). Then they will switch and receive laryngeal vibration at 5Hz frequency every second day of the week (high intensity) for a duration of 4 weeks.
Participants in the high-low comparator group will receive Laryngeal Vibration (Comparator) at 5Hz frequency every second day of the week for a duration of 4 weeks (high intensity). Then they will switch and receive laryngeal vibration at 5Hz frequency once a week for a duration of 4 weeks (low intensity).