The FlexiOH Ulnar Gutter covers the ulnar side of the forearm and hand, holding the ring and little fingers and the wrist while leaving the thumb, index, and middle fingers free. It suits emergency departments, fracture clinics, plaster rooms and hand therapy services.
The population is specific and worth designing around. Fifth metacarpal neck fractures occur overwhelmingly in younger adults, disproportionately young men, commonly sustained by striking something. They are usually working, often in manual roles, and three weeks in a rigid device is a long imposition on someone with no other functional limitation. They are also the group least likely to leave an immobilisation alone. A device that vents, that the patient can wash, and that can be opened and refitted at review gives itself the best chance of still doing its job at the end of the period.
The open lattice serves the clinical side of the same point. Pressure injury is a recognised complication of hand immobilisation and the ulnar border is where it concentrates, and comparative work on fifth metacarpal fractures has recorded lower pressure wound rates where the skin stayed accessible. Direct inspection at review needs no removal.
On indication, departments should know the randomised evidence for the commonest case. Multiple trials and two systematic reviews support soft wrap with buddy taping and early mobilisation for angulation under 70 degrees without rotational deformity, with return to work eleven days sooner in one multicentre trial. Where immobilisation is genuinely indicated — rotation, greater angulation, phalangeal injury, post-operative work — this is the geometry for it.
The conformity documentation and instructions for use are issued by the manufacturer and provided by the seller.

