A major focus of occupational therapy is rehabilitation related to impairments of the upper extremity (i.e., shoulder, elbow, forearm, wrist, hand). This is a good article on the role of OT in this type setting.
Edema control for the hands were discussed in lab, but I was not quit sure if there was anything else that could help. So this video discusses about messaging techniques for the hand and forearm that can help reduce edema. Also, she talks about specific wraps for different sections of the arm. This video is not long, but this video helped me see how an OTA would educated a patient on this process for self independence.