Dysphonia Voice Disorders
Conditions
Interventions
This study is a randomized controlled clinical trial with two parallel arms and a double-blind design. After providing written informed consent, eligible participants will be randomly allocated into t
Sponsors
Universidade Federal de Pernambuco
Universidade Federal de Pernambuco
Eligibility
Age
18 Years to 59 Years
Inclusion criteria
Inclusion criteria: Amateur singers of both sexes. Age between 18 and 59 years. Score greater than 16 on the Voice Symptom Scale. Score greater than 23 on the Singing Voice Handicap Index. Normal laryngeal structure and mobility, with no abnormalities explaining vocal complaints or symptoms, confirmed by laryngeal endoscopy. Provision of written informed consent
Exclusion criteria
Exclusion criteria: Pregnant individuals. History of photosensitivity. Diagnosis of glaucoma. Dermatological treatment involving the face or neck. Use of vasodilator medications or topical acids. Presence of a cardiac pacemaker, brain pacemaker, or any other implanted electronic device. Thyroid disorders, including thyroiditis and thyroid cancer. Active malignant disease. Skin lesions, wounds, or ulcerations at the irradiation site. Human papillomavirus infection
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Reduction in vocal symptoms measured by the Voice Symptom Scale (VoiSS/ESV) after photobiomodulation associated with vocal training in amateur singers with vocal symptoms. Timepoint: Baseline and after completion of the 10 intervention sessions (5 weeks). | — |
Secondary
| Measure | Time frame |
|---|---|
| Secondary Outcomes Reduction in vocal handicap in singing voice measured by the Classical Singing Handicap Index (CSHI/IDV-C). Timepoint: Baseline and after completion of the intervention protocol (5 weeks). Reduction in self-perceived vocal fatigue measured by the Vocal Fatigue Index (VFI/IFV). Timepoint: Baseline and after completion of the intervention protocol (5 weeks). Reduction in vocal effort perception measured by the Borg CR10-BR Scale adapted for vocal effort. Timepoint: Before and immediately after each intervention session. Reduction in vocal tract discomfort symptoms measured by the Vocal Tract Discomfort Scale – Brazilian Version (VTDS-BR). Timepoint: Baseline and after each intervention session. Improvement in acoustic vocal parameters obtained through sustained vowel emission, connected speech, and singing voice recordings analyzed using Voxmetria® software. Timepoint: Baseline and after each intervention session. Improvement in vocal range and vocal intensity performance assessed through Vocalgrama software during ascending and descending glissando tasks. Timepoint: Baseline and after each intervention session. Maintenance of normal laryngeal structure and mobility assessed through laryngeal endoscopy. Timepoint: Baseline assessment. | — |
Countries
BR
Contacts
Public ContactMayara Souza
Universidade Federal de Pernambuco
Outcome results
None listed