SAN DIEGO--(BUSINESS WIRE)--DexCom, Inc. (NASDAQ:DXCM) today announced that it has received Food and Drug Administration (FDA) approval to calibrate the SEVENTM, its seven-day continuous glucose monitoring system, using any FDA cleared blood glucose meter. With this approval, patients will be able to calibrate the system without using a connection cable. DexCom expects to launch this feature to new patients near the end of the first quarter of 2008 and upgrade existing patients during the second quarter of 2008.