RANDOMIZED CONTROLLED TRIAL
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Perceptual characteristics of tracheoesophageal speech production using the new indwelling Provox Vega voice prosthesis: a randomized controlled crossover trial.

Head & Neck 2011 January
BACKGROUND: The objective of this study was to determine if the design enhancements incorporated into the new Provox Vega Indwelling Voice prostheses result in any positive benefits in vivo.

METHODS: Using a randomized, crossover study design, 31 participants using tracheoesophageal speech postlaryngectomy completed a 3-week trial of the Provox Vega and a comparator device. Main outcome measures included patient perceptions of vocal effort and quality using each device, and perceptual judgments of voice quality produced.

RESULTS: The majority of patients (72%) indicated the Provox Vega gave them overall better voice quality and 52% felt they required less effort to phonate. Voice samples produced with the Provox Vega were also perceived by listeners to be significantly (p < .05) less strained, easier to understand, produced with less effort, and the better speech sample overall.

CONCLUSION: Results support that the aerodynamic improvements incorporated in the design of the new Provox Vega facilitate enhanced voice and speech qualities.

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