There is risk of contracture when pillow is placed under knee after TKR. This causes a shortening or distortion of muscular or connective tissue which can result in deformity of the joint. Also make sure when they are sitting in recliners to place something under recliner bottom so that it doesn't fall downwards. Place rolled towels under heels. Hope this helps. Ortho, Neuro, general Surgery LPN for 3 years Catjo