 Variations of the ischial containment socket thus exists and each socket is tailored to the specific needs of the patient.Others who contributed to socket development and changes over the years include Tim Staats, Chris Hoyt, and Frank Gottschalk.Gottschalk disputed the efficacy of the CAT-CAM socket- insisting the surgical procedure done by the amputation surgeon was most important to prepare the amputee for good use of a prosthesis of any type socket design.