Is there any role for C-peptide in the management of type 2 diabetes mellitus? — VICKIE LANDRETH, RN, MSN, FNP, Lyons, Colo.

Neither the American Diabetes Association nor the American Association of Clinical Endocrinologists guidelines address the role of C-peptide in the management of type 2 diabetes. The American Association for Clinical Chemistry states there is no role for routine testing for C-peptide in most patients with diabetes. — Eileen F. Campbell, MSN, CRNP, Associate Program Director, Family Health Nurse Practitioner Program, University of Pennsylvania School of Nursing, Philadelphia (151-1)