Integrating Swallowing Rehabilitation Into Dysphonia Treatment: A Systematic Review and Meta-Analysis of Cross-Therapy Approaches.

BACKGROUND

Dysphonia, affecting a portion of the global population, poses social and economic burdens. The intricate interplay between phonation and deglutition disorders necessitates innovative therapeutic approaches. Cross-therapy, applying swallowing rehabilitation maneuvers for phonatory improvement, offers potential yet underexplored benefits.

OBJECTIVE

This study aims to evaluate the efficacy and applicability of cross-therapy in managing dysphonia and dysphagia, addressing the existing gap in therapeutic interventions through a comprehensive systematic review and meta-analysis.

METHOD: An exhaustive literature search was conducted across PubMed, Scopus, Web of Science, and Cochrane Library, for studies published between July 2013 and July 2023. The selection criteria focused on studies exploring the use of swallowing maneuvers in phonation rehabilitation, including randomized controlled trials, cohort studies, and observational studies. From the initial 1665 articles identified, 7 met the stringent inclusion criteria for detailed analysis and meta-analysis.

RESULTS

The meta-analysis revealed statistically significant improvements in phonatory functions following cross-therapy interventions. Key parameters such as Maximum Phonation Time and Fundamental Frequency showed positive trends post intervention. Despite variability in study designs, participant demographics, and outcome measures, the overall findings support the potential applicability of cross-therapy in clinical settings.

CONCLUSIONS

Cross-therapy demonstrates promise as an innovative approach for dysphonia management, emphasizing the integration of swallowing maneuvers to enhance voice quality. However, the presence of heterogeneity and potential publication bias necessitates cautious interpretation. Further well-designed research, including high-quality randomized controlled trials, is essential to solidify these preliminary insights and develop standardized treatment protocols.