Affiliation:
1. Department of Otorhinolaryngology ‐ Head and Neck Surgery The Chinese University of Hong Kong, Prince of Wales Hospital Shatin New Territories Hong Kong
2. Department of Otorhinolaryngology ‐ Head and Neck Surgery United Christian Hospital and Tseung Kwan O Hospital Tseung Kwan O Hong Kong
3. The Institute of Human Communicative Research The Chinese University of Hong Kong Hong Kong
4. Department of Clinical Oncology Prince of Wales Hospital Shatin New Territories Hong Kong
5. Department of Clinical Oncology Queen Elizabeth Hospital Kowloon Hong Kong
Abstract
AbstractBackgroundExercise‐based swallowing training (EBST) and transcutaneous neuromuscular electrical stimulation (TNMES) are common modalities used to treat late dysphagia after radiotherapy for nasopharyngeal carcinoma (NPC). We aimed to investigate and compare the efficacies of EBST and TNMES as proactive treatments administered early after radiotherapy.MethodsPatients with early post‐radiotherapy NPC (n = 120) underwent either TNMES or EBST. Flexible endoscopic evaluation of swallowing (FEES), quality of life (QOL), and swallowing function questionnaires were completed before the intervention as well as immediately, 6, and 12 months after the intervention. Outcome measures included the scores for the swallowing function score (SFS), penetration and aspiration scale (PAS), dynamic imaging grade of swallowing toxicity (DIGEST), functional oral intake scale (FOIS), swallowing performance status scale (SPSS), pharyngeal motor impairment (PMI), pharyngeal function impairment (PFI), and functional assessment after cancer therapy–nasopharyngeal (FACT‐NP) questionnaire.ResultsThree months after radiotherapy, 31 and 34 patients underwent TNMES and EBST, respectively, and completed swallowing assessments at all four assessment timepoints. All patients showed post‐radiotherapy impairments in the SFS, PAS, DIGEST, PMI, and PFI. Compared with the EBST group, the TNMES group showed significant improvements in the PFI and PMI scores, with small‐to‐medium effect sizes. Additionally, compared with the EBST group, the TNMES group demonstrated a trend toward slightly better improvements in the PAS, DIGEST, FOIS, and SPSS scores immediately and 6 months after the intervention. The SFS scores improved from baseline in both groups; however, the TNMES group showed an earlier improvement. Finally, the TNMES group showed better QOL according to the FACT‐NP than the EBST group.ConclusionProactive TMNES and EBST are safe and feasible modalities for improving swallowing in patients with NPC when administered early after radiotherapy. Although TNMES showed better results than EBST, these results should be interpreted with caution given the study limitations.Level of evidence1B.
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