Multi-layer film welded articulated balloon

1. A multi-layer film heat welded medical balloon device comprising a multiplicity of layers of thermoplastic film including at least two thermoplastic film layers heat welded at peripheral edges to form a compartment adapted to receive fluid to expand said film layers relative to each other, and heat welded at one or more locations inside an area enclosed by the heat welded peripheral edges so as to enable the balloon device to articulate to a desired shape upon inflation, with a third thermoplastic film layer of said multiplicity of layers arranged so that a distal portion of the balloon device will bulge upwardly to form said desired shape upon inflation, and at least one of the layers heat welded to another of said layers, intermediate said peripheral edges, to form subcompartments in fluid communication with one another in said compartment that are configured to enable the device to articulate to said desired shape, wherein all layers are heat welded to one another at peripheral edges thereof, wherein all heat welded locations of said medical balloon device comprise heat weld regions on the thermoplastic film layers joining the thermoplastic film layers at said locations to one another.

2. The medical balloon device of claim 1 , comprising a fluid passage member sealed at a proximal neck of the balloon device for inflation of the balloon device.

3. The medical balloon device of claim 1 , wherein said desired shape is effective to support a prostate in spaced relation to other organs during prostate surgery.

4. The medical balloon device of claim 1 , wherein said multiplicity of layers comprises layer(s) of different thickness.

5. The medical balloon device claim 1 , wherein said multiplicity of layers comprises layer(s) of different modulus of elasticity.

6. A multi-layer film heat welded medical balloon device, comprising a multiplicity of layers of thermoplastic film including first and second thermoplastic film layers heat welded to one another to form a first inflatable compartment, and a third thermoplastic film layer heat welded to the second thermoplastic film layer to form a second inflatable compartment, wherein the first and second inflatable compartments are in fluid communication with one another in an inflatable interior volume sealed by heat welded thermoplastic film edges, and arranged so that upon inflation of the medical balloon device, a distal portion of the balloon device will bulge upwardly, wherein all layers are heat welded to one another at peripheral edges thereof, and wherein at least one of the layers is heat welded to another of said layers, intermediate said peripheral edges, to enable the distal portion of the balloon device to bulge upwardly, wherein all heat welded locations of said medical balloon device comprise heat weld regions on the thermoplastic film layers joining the thermoplastic film layers at said locations to one another.

7. The medical balloon device of claim 6 , comprising a fluid passage member communicating with said interior volume and sealed at a proximal neck of the balloon device.

8. The medical balloon device of claim 6 , wherein the balloon device upon inflation and upward bulging of the distal portion thereof is effective to support a prostate in spaced relation to other organs during prostate surgery.

9. The medical balloon device of claim 6 , wherein said multiplicity of layers comprises layer(s) of different thickness.

10. The medical balloon device claim 6 , wherein said multiplicity of layers comprises layer(s) of different modulus of elasticity.