Question explored with the scientific record
Conversation so far
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- 1 What voice therapy protocol is used most often after thyroidectomy paralysis?
- 2 What voice therapy goals and exercises are commonly used anyway?
- 3 How do results compare for therapy vs injections or surgical repair?
Answered on this page ↓
How do results compare for therapy vs injections or surgical repair?
The short version: voice therapy and surgery both improve voice after thyroidectomy paralysis, but the evidence never compares them head-to-head in the same trial.
The only randomized comparison in this retrieval is voice therapy versus thyroplasty, and both improved maximum phonation time substantially by three months [1]. Voice therapy alone also moved glottic closure from incomplete to complete in half of patients, and maximum phonation time nearly doubled [2]. A 12-week therapy protocol beat a control group on every measured parameter [3]. Injection laryngoplasty improved voice and swallowing in a retrospective cohort [7]. Reinnervation improved voice-related quality of life significantly [5].
What the evidence does not contain is a single trial randomizing patients to therapy versus injection versus surgery with the same outcome measures. The 2017 study is the closest, but it compares therapy to thyroplasty only, not to injection [1]. No study reports durability beyond three months for therapy, while one thyroplasty case showed stable improvement at 34 months [9]. Shimmer did not improve with voice therapy in the randomized study [1].
| Measure | Voice therapy (3 mo) | Thyroplasty (3 mo) |
|---|---|---|
| Max phonation time | 5.7 to 16.6 s [1] | 5.1 to 15.4 s [1] |
| Jitter | 0.39% to 0.27% [1] | 1.27% to 0.48% [1] |
| Shimmer | 3.53% to 3.39% [1] | 5.76% to 2.84% [1] |
My call: therapy is a reasonable first step with real measurable gains, but the evidence does not prove it matches surgery in magnitude or durability. Confidence: moderate that both work, low that they are equivalent.
Sources examined 9
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Voice Quality Following Unilateral Vocal Fold Paralysis: A Randomized Comparison of Therapeutic Modalities
This study evaluates the efficacy of voice therapy versus thyroplasty in improving voice quality in patients with unilateral vocal fold paralysis (UVFP), finding significant improvements in both treatment modalities but noting that shimmer did not improve with voice therapy.
DOI: 10.1016/j.jvoice.2017.02.015 -
Role of early voice therapy in patients affected by unilateral vocal fold paralysis
This study evaluates the effectiveness of early voice therapy in improving vocal function in patients with unilateral vocal fold paralysis, demonstrating significant improvements in various vocal parameters post-treatment.
DOI: 10.1017/s0022215107000679 -
Efficacy of Voice Therapy for Patients With Early Unilateral Adductor Vocal Fold Paralysis
This study investigates the efficacy of a 12-week voice therapy protocol for patients with early unilateral adductor vocal fold paralysis, demonstrating significant improvements in voice function compared to a control group.
DOI: 10.1016/j.jvoice.2017.01.007 -
Does hoarseness of voice from recurrent nerve paralysis after esophagectomy for carcinoma influence patient quality of life?
A retrospective study of 51 esophageal cancer patients with recurrent laryngeal nerve paralysis after esophagectomy (Akiyama three-field lymphadenectomy) showing that hoarseness from vocal cord palsy can spontaneously improve in about half, but persistent severe hoarseness marke…
DOI: 10.1016/s1072-7515(98)00295-6 -
Does Dysphagia Improve Following Laryngeal Reinnervation for Treatment of Hoarseness in Unilateral Vocal Fold Paralysis?
This retrospective study of UVFP patients undergoing laryngeal reinnervation assesses swallowing outcomes (EAT-10) and voice-related quality of life (VHI-10), finding a non-significant drop in dysphagia scores but a significant improvement in voice-related QoL, suggesting possib…
DOI: 10.1016/j.jvoice.2019.08.005 -
Pathological sulcus vocalis: treatment approaches and voice outcomes in 36 patients
This retrospective study evaluates the surgical treatment outcomes for 36 patients with pathological sulcus vocalis, demonstrating significant improvements in voice quality and acoustic parameters post-treatment.
DOI: 10.1007/s00405-018-5040-2 -
Vocal Quality of Life Improves with Treatment of Laryngopharyngeal Reflux
Two ENT studies show that treatment of laryngopharyngeal reflux improves vocal quality of life and related symptom indices in a prospective case series, and that injection laryngoplasty using collagen, autologous fat, or gelfoam improves vocal function and swallowing in unilater…
DOI: 10.1016/j.otohns.2004.06.404 -
Therapeutic Dilemmas in the Management of Thyroid Cancer with Laryngotracheal Involvement
A retrospective review of 22 thyroid cancer patients invading the larynx/trachea treated at a single Korean center (1989–1996) showing that aggressive airway-reconstructive surgery (laryngectomy or tracheal resection) yielded good survival and functional outcomes in most operabl…
DOI: 10.1016/s0194-5998(00)70212-9 -
Long-Term Quantitative Results of an Isshiki Type 4 Thyroplasty—A Case Study
Bilateral Isshiki Type IV thyroplasty after bilateral external superior laryngeal nerve damage yields durable higher-pitched, clearer voice with improved VHI-10 scores over 34 months, though overall vocal range diminishes.
DOI: 10.1016/j.jvoice.2009.11.007