Embodiments of medical device(s) configured for use by a debilitated or single handed user including flexible strap sections, a semi-rigid strap section configured to be formed into at least a partially enclosing semi-rigid shape by the user, and a ratcheting strap retraction unit or buckle coupled to one end of the first flexible strap section and an oversized buckle on an opposing end of the first strap section. A semi-rigid strap section is configured to insert into and be drawn into the oversized buckle and formed into an enclosing shape, maneuvered by the user over an injured appendage past a point of injury, then folded back over the oversized buckle next the user operates the ratcheting strap retraction unit or buckle to constrict the strap sections to apply enclosing pressure to the injured appendage. Embodiments can further comprise an injector medical case module and a medical condition monitoring system.
