Consensus Among International Facial Therapy Experts for the Management of Adults with Unilateral Facial Palsy: A Two-Stage Nominal Group and Delphi Study.

Background: Nonsurgical rehabilitation of unilateral peripheral facial palsy (FP) varies globally with controversy regarding best practice. Objective: To develop facial therapist consensus regarding what should be included or excluded in rehabilitation of adults with FP of any etiology. Three clinical presentations: flaccid, paretic and synkinetic, were separately considered. Methodology: A two-stage study was conducted: a nominal group technique (NGT) to develop a questionnaire plus Delphi study. Delphi participants were recruited worldwide, through an experience-based inclusion questionnaire. The final Delphi questionnaire included 166 items for each clinical presentation covering assessment, outcome measures, and interventions, for example, education, eye care, neuromuscular retraining, and electrical modalities. Inclusion/exclusion agreement was set at 80%, indicating participant consensus. Items reaching 70-79% were deemed "near-included/near-excluded." Results: Averaged across all presentations, 24.9% of the 166 items were included, (e.g., Sunnybrook Facial Grading System, patient education and neuromuscular retraining), 26.9% of the 166 items were excluded, (e.g., gross strengthening and electrical stimulation); 48.2% were neither included nor excluded. Conclusion: This study brings together the global community's expertise as a first step toward establishing best practice for specialist facial therapy. It is hoped this will guide clinical decision making, advance research, and optimize patient outcomes in this challenging field.