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Acta Otorrinolaringológica Española Patient reported voice outcomes following multi-disciplinary approach to botulis...
Journal Information
Vol. 76. Issue 5.
(September - October 2025)
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Vol. 76. Issue 5.
(September - October 2025)
Original article
Patient reported voice outcomes following multi-disciplinary approach to botulism toxin for spasmodic dysphonia
Resultados de voz reportados por los pacientes tras un enfoque multidisciplinario con toxina botulínica para la disfonía espasmódica
Sahil Kakara,
Corresponding author
Sahil.kakar1@nhs.net

Corresponding author.
, Keshav Kumar Guptaa, Emma Richardsb, Colin Shirleyc, Paige Bradleyd, Anita Sonsalea
a Department of ENT and Laryngology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
b Department of ENT and Laryngology, Princess Royal Hospital, Shrewsbury and Telford NHS Trust, Telford, United Kingdom
c Department of Neurophysiology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
d Speech and Language Therapy, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
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Figures (2)
Tables (4)
Table 1. Baseline characteristics of the included patients (n=52).
Tables
Table 2. Mean patient reported voice quality following each Botulinum Toxin dose, graded on a scale of 1–5 for patients with abductor spasmodic dysphonia (n=8).
Tables
Table 3. Mean patient reported voice quality following each Botulinum Toxin dose, graded on a scale of 1–5 for patients with adductor spasmodic dysphonia (n=42).
Tables
Table 4. Complications following Botulinum Toxin as reported by patients.
Tables
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Abstract
Purpose

Spasmodic dysphonia (SD) is a debilitating disorder primarily affecting voice production. Current treatment includes repeat botulinum toxin (botox) injections for symptomatic management. The aim of this study is to review the impact of botox injections on patient reported outcome measures (PROM), using a novel and unique quality of life, proforma, and side effects in patients treated at our centre.

Methods

This retrospective case series evaluated all patients who were treated in our specialised voice clinic, at a single tertiary referral centre between May 2019 and April 2024 with botox for SD. The primary outcome measure was PROM of voice quality weekly post-injection as per a unique proforma. Variables extracted included patient demographics, treatment specifics and complications.

Results

Fifty-two patients were included representing 21 (40.4%) males. Forty-two (80.8%) suffered from adductor spasmodic dysphonia with 8 (15.4%) having abductor dysphonia and 1 (1.92%) with mixed dysphonia. Patients with abductor dysphonia had a statistical improvement in voice following dose 2, (1.8–3.0, p=0.03) and dose 3 (1.4–3.2, p = <0.001). Patients with adductor dysphonia had significant improvements in voice following all doses (2.1–2.9, p=0.01), (1.9–3.0, p = <0.01) and (2.1–3.0, p = <0.01). The most common complication was a ‘breathy voice’, ranging from 31.4% to 51.0% but all patients reported this as transient.

Conclusion

Patient reported quality of voice is improved following botox injections for spasmodic dysphonia, and most patients do not suffer from long-term complications.

Keywords:
English
Spasmodic dysphonia
Botulinum toxin
Voice
Quality of life
Patient reported outcome measures
Resumen
Objetivo

La disfonía espasmódica (DS) es un trastorno debilitante que afecta principalmente la producción de voz. El tratamiento actual incluye inyecciones repetidas de toxina botulínica (bótox) para el manejo sintomático. El objetivo de este estudio es revisar el impacto de las inyecciones de bótox en las medidas de resultados reportadas por los pacientes (MRP), utilizando un novedoso y único formulario de calidad de vida y efectos secundarios en pacientes tratados en nuestro centro.

Métodos

Esta serie de casos retrospectiva evaluó a todos los pacientes tratados con bótox para la DS en nuestra clínica especializada en voz, en un único centro de referencia terciario, entre mayo de 2019 y abril de 2024. La medida de resultado principal fue la MRP de la calidad de voz semanalmente después de la inyección, según un formulario único. Las variables extraídas incluyeron datos demográficos de los pacientes, detalles específicos del tratamiento y complicaciones.

Resultados

Se incluyeron cincuenta y dos pacientes, 21 (40,4%) varones. Cuarenta y dos (80,8%) presentaban disfonía espasmódica aductora, 8 (15,4%) disfonía abductora y 1 (1,92%) disfonía mixta. Los pacientes con disfonía abductora presentaron una mejoría estadísticamente significativa de la voz tras la segunda dosis (1,8 a 3,0; p=0,03) y la tercera (1,4 a 3,2; p = <0,001). Los pacientes con disfonía aductora presentaron mejoras significativas de la voz tras todas las dosis (2,1 a 2,9; p=0,01), (1,9 a 3,0; p = <0,01) y (2,1 a 3,0; p = <0,01). La complicación más frecuente fue la voz entrecortada, con una incidencia del 31,4% al 51,0%, aunque todos los pacientes la reportaron como transitoria.

Conclusión

La calidad de voz reportada por los pacientes mejora tras las inyecciones de bótox para la disfonía espasmódica, y la mayoría de los pacientes no sufren complicaciones a largo plazo.

Palabras clave:
Disfonía espasmódica
Toxina botulínica
Voz
Calidad de vida
Medidas de resultados informadas por el paciente

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