HANLOT Trial - Phase 1 Trial of a Differential Pressure Product for Treatment of Head and Neck Lymphoedema

This is a non-randomised, single-arm phase 1 feasibility trial assessing the tolerability and efficacy of the ChezLeon DP-Tx product (neck wrap) in patients with head and neck lymphoedema (HNL) for at least 3 months post radiotherapy. Participants will be asked to wear the DP- Tx neck wrap as much as possible over for 6 weeks. Participants will be shown how to fit the neck wrap at their first trial visit and also provided with written instructions. The neck wrap is to be fitted firmly but comfortably around the neck and held in place by a Velcro fastening. Participants will be asked to provide feedback in a participant dairy on the comfort/tolerability of the neck wrap and how long it was worn each day and night of the 6-week trial. Participants will be asked to attend trial follow up visits at 1, 3 and 6-weeks. At each visit, participants will be asked about their experience wearing the neck wrap and participant diaries will be reviewed. HNL will also be assessed at Baseline, Week 3 & 6. External lymphedema. Head and neck measurements will be taken to assess changes in external lymphedema and a nasoendoscopy performed to assess changes internal lymphedema changes. A nasoendoscopy is a low-risk procedure that takes approximately 5 minutes to perform in which a small flexible camera is passed through the nose so that a clear view of your throat and surrounding structures can be obtained.