A surgical device for displacement of organs within a body cavity for providing at least visual access to a selected site includes an expandable bladder, wherein the elasticity of the bladder varies across the surface of the bladder, said variation in elasticity selected to provide a predetermined, non-spherical shape when expanded; and a valve on the proximal end on the inflatable bladder for introduction of a pressurizing gas into the soft bladder.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 The present invention was made with United States government support under Grant Nos. W911NF-11-1-0094 and W911NF-09-1-0476 awarded by Defense Advanced Research Projects Agency (DARPA), and under Grant No. DE-FG02-00ER45852 awarded by the Department of Energy. The United States government has certain rights in this invention.