Birkova Disposable Armboard Safety Strap: PR-4900. The disposable arm board patient safety strap consists of one single-use strap with hook and loop closure. Patient safety straps are made specifically for the medical industry to help and assure the patient’s stability and proper positioning. They are used in the surgery room on Surgical Tables, Armboards, or Beds, and also used on stretchers for a safer transfer. See tabs for more information.