The invention is a device and corresponding method for the rotatable selection, preparation and recollection of hemodialysis cannulation sites along a surgically constructed arterio-venous fistula or arterio-venous graft of a patient with end-stage renal disease. The device comprises a program, a site preparation card, transparent dressings held in a dressing folder; transferably detachable self-adhesive mnemonic markers, and a skin marking device. The program has means for removably receiving the site preparation card, the transparent dressings held in the dressing folder, and the detachable self-adhesive mnemonic marker. The skin marking device has means for removably attaching to the program. The method utilizes a system of instruction and interaction with the device to enable the patient to rotatably select, prepare and recall hemodialysis cannulation sites along the patient's arterio-venous fistula or arterio-venous graft, thereby minimizing trauma, infection and pain, and also maximizing the longevity of the arterio-venous fistula or arterio-venous graft.