Surgery – Instruments – Means for inserting or removing conduit within body
Patent
1998-07-15
2000-08-15
Buiz, Michael
Surgery
Instruments
Means for inserting or removing conduit within body
606200, A61F 1100
Patent
active
061029173
ABSTRACT:
A system for releasing a target material, such as an embolic coil from an SMP located at the end of a catheter utilizing an optical arrangement for releasing the material. The system includes a laser, laser driver, display panel, photodetector, fiber optics coupler, fiber optics and connectors, a catheter, and an SMP-based gripper, and includes a release sensing and feedback arrangement. The SMP-based gripper is heated via laser light through an optic fiber causing the gripper to release a target material (e.g., embolic coil for therapeutic treatment of aneurysms). Various embodiments are provided for coupling the laser light into the SMP, which includes specific positioning of the coils, removal of the fiber cladding adjacent the coil, a metal coating on the SMP, doping the SMP with a gradient absorbing dye, tapering the fiber optic end, coating the SMP with low refractive index material, and locating an insert between the fiber optic and the coil.
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G. Geremia et al., Embolization of Experimentally Created Aneurysms with a Laser-Activated Detachable Coil Device, UNR, Am. J. Neuroradiol 19:566-569, Mar. 1998.
Da Silva Luiz
Lee Abraham P.
Maitland Duncan J.
Schumann Daniel L.
Buiz Michael
Carnahan L. E.
Goldberg Jonathan D.
The Regents of the University of California
Thompson Alan H.
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