A surgical instrument is operable to deploy an anastomotic ring device. The reinforcing members aid the load bearing body in resisting bending forces and, in certain forms, aid in preventing expulsion of the implant after implantation. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. If the item weights more than a stored maximum value, the electronic device will not cause the tray to be lifted. Accordingly, since the brake force holding control that holds the brake force to the predetermined value or more is executed by the braking device main body based on at least a change amount per unit time of an operation amount of the brake operation member, holding of the brake force can be appropriately executed regardless of an operation state.