There are two Applications VCR are waiting to be passed by the FDA, the two Applications when granted will bring into play the Tets technology, these are already granted in Australia.
http://www.freepatentsonline.com/20060030748.html?highlight=ventrassist,pty,ltd&stemming=on
http://www.freepatentsonline.com/20070142696.html?highlight=ventrassist,pty,ltd&stemming=on
Cheers dma