A method including introducing a treatment agent at a treatment site within a mammalian host; and introducing a bioerodable gel material at the treatment site. An apparatus including a first annular member having a first lumen disposed about a length of the first annular member and a first entry port...http://www.google.com/patents/US7361368?utm_source=gb-gplus-sharePatent US7361368 - Device and method for combining a treatment agent and a gel
