Interventions for dysphagia in long-term, progressive muscle disease

Area of Science:

• Neurology
• Rehabilitation Medicine
• Clinical Trials Methodology

Background:

• Swallowing involves oral, pharyngeal, and esophageal phases, crucial for nutrient intake.
• Muscle weakness in progressive myopathies significantly impairs swallowing function, leading to dysphagia.
• Effective interventions for dysphagia in long-term muscle diseases require ongoing evaluation.

Purpose of the Study:

• To systematically assess the efficacy of interventions for managing dysphagia in individuals with long-term, progressive muscle diseases.
• To update previous reviews on dysphagia interventions, incorporating new evidence and refining search strategies.

Main Methods:

• Comprehensive search of multiple electronic databases (Cochrane, MEDLINE, EMBASE, etc.) and clinical trial registries.
• Inclusion of randomized and quasi-randomized controlled trials evaluating interventions for dysphagia in progressive muscle diseases.
• Application of standard Cochrane methodological procedures for data collection and analysis.

Main Results:

• No randomized controlled trials (RCTs) reported primary outcomes like weight gain or maintenance for dysphagia interventions.
• One RCT on intravenous immunoglobulin for inclusion body myositis showed reduced swallowing time via ultrasound but had high risk of bias and low-quality evidence.
• Non-randomized studies suggested potential benefits of intravenous immunoglobulin and lip-strengthening exercises, but lacked robust data on dysphagia outcomes.

Conclusions:

• Insufficient and low-quality RCT evidence currently exists to determine the effectiveness of interventions for dysphagia in progressive muscle diseases.
• The efficacy of intravenous immunoglobulin for dysphagia in inclusion body myositis remains unconfirmed due to limited evidence.
• Development of standardized, validated outcome measures focusing on functional disability is crucial for future dysphagia research in muscle diseases.