While PROMUS Element is a new DES system, its constituent parts are either approved by the Food and Drug Administration (FDA, i.e., drug and polymers from PROMUS, P070015), are under investigation in an FDA-approved trial (i.e., Element stent component in the PERSEUS trial, G060237), or have received an approvable letter from the FDA. The balloon component material of the PROMUS Element delivery system is the same as that used in TAXUS Liberté (P060008), which received an approvable letter on February 11, 2008. The PROMUS Element stent delivery system is from the Apex™ Monorail™ PTCA Dilatation Catheter (P860019/S208), which received an approvable letter on October 24, 2006. Table 1 compares the TAXUS Express2, TAXUS Liberté, and PROMUS Element stent systems.