I have been specialising in the field of Brachial Plexus Management for the last 12 years. Over the last 4 years I've been working on a new orthosis. The purpose of this article is to introduce a new ‘dynamic flexion assist orthosis’ that would serve to improve the functional impairment caused by brachial plexus injury or similar and, as yet, not addressed by existing orthoses. The resulting orthosis is a new concept in this field and utilises a gas spring to achieve a flexion force in opposition to functional triceps. Clinical results have been positive in terms of evaluation by the DASH scale and through patient feedback and observed improvements in lifestyle.