An apparatus for tissue dissection and instrument anchoring and methods for using such apparatus are disclosed. The apparatus includes a cannula, a dissection balloon releasably attached to the cannula at the distal end, an anchoring balloon disposed on the cannula, and a means for inflating both ba...http://www.google.co.uk/patents/US7744617?utm_source=gb-gplus-sharePatent US7744617 - Method and inflatable chamber apparatus for separating layers of tissue
