slide 1 of 2, Quad sets, 1  Sit with your leg straight and supported on the floor or a firm bed. 2  Tighten the muscles on top of your thigh by pressing the back of your knee flat down to the floor. 3  Hold for about 6 seconds, then rest up to 10 seconds. 4  Do this for 8 to 12 repetitions several times a day.
Allograft definition, a tissue or organ obtained from one member of a species and grafted to a genetically dissimilar member of the same species. See more. Dictionary.com
With interbody techniques some type of device is inserted into the intervertebral space. Itâs important for the coder to be able to differentiate between these devices. Any type of structural bone graft, whether it is an allograft or autograft should be coded with 20931 (allograft) or 20938 (autograft).