The American Orthopaedic Foot and Ankle Society will sponsor "The Diabetic Foot" on Sept. 30-Oct. 1 in New Orleans. Contact: Diane Fields, AOFAS, 701 16th Ave., Seattle, Wash. 98122, (800) 235-4855 . . . "The Elbow," sponsored by the American Society for Surgery of the Hand and the American Shoulder and Elbow Society, will be held Aug. 23-26 in Vail, Colo. Contact: ASSH, 6060 Greenwood Plaza Blvd., Suite 100, Englewood, Colo. 80111, (303) 771-9236.