The foot rest (A) consists of a board of five-ply wood connected to two flat steel bars and so constructed that a slot at the lower ends of the board permits it to slide or be moved on guide rails attached to the sides of a wooden box-like structure, as shown in Figure 1. The flat bars are connected to the board by wing nuts, which permit adjustment of the height (Fig. 2). This structure is lined with a thin layer of sponge rubber. The device is so designed that the foot board can be brought up to the patient's paralyzed or affected feet simply by tilting the footboard and sliding it forward or backward as the case may require. To secure the foot rest in place it is pulled forward on the guide rails. This releases the engagement, and it is then dropped downward at the appropriate distance required.
KENT H. ADJUSTABLE FOOT RESTS. AMA Arch Surg. 1954;68(1):131–134. doi:10.1001/archsurg.1954.01260050133018
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