In one embodiment, the present disclosure provides a portable medical instrument system. The system includes a frame for supporting system process and user interface components. One or more support rails are interconnected with the frame to provide an accessories support system to securely receive medical accessory components. In at least one embodiment, the support rails have a configuration substantially matching a bedrail of a hospital bed. In another aspect, the support rails have a height to width ratio of about 2 to1. In still a further aspect, the support rails have a height to width ration of 1 to 0.375. According to yet another aspect, at least one of the support rails may be molded from portions of the portable medical system itself.