Surgery – Instruments – Internal pressure applicator
Patent
1996-10-23
1998-12-01
Dawson, Glenn K.
Surgery
Instruments
Internal pressure applicator
604 96, A61M 2900
Patent
active
058431195
ABSTRACT:
Apparatus and methods are provided for first expanding a body lumen of a body vessel or organ and then deploying a prosthesis to maintain the lumen patent. The apparatus includes a catheter having a balloon member formed of a biocompatible material, a balloon cutting element, and a thermally activated shape memory alloy prosthesis disposed within the balloon. The prosthesis is formed of nickel-titanium alloy having a reduced diameter in the martensite phase, and an expanded diameter in the austenite phase. The balloon member is inflated using a first fluid having a temperature below the martensite transition temperature to expand the body lumen and a second fluid having a temperature sufficient to cause the prosthesis to transition to the expanded diameter, trapping the material of the balloon member against the body wall. A cutting device disposed on the catheter then severs balloon member to release the prosthesis.
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Dawson Glenn K.
United States Surgical Corporation
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