Surgery – Instruments – Means for inserting or removing conduit within body
Patent
1999-02-08
2000-07-11
Mancene, Gene
Surgery
Instruments
Means for inserting or removing conduit within body
A61B 1700
Patent
active
060865997
ABSTRACT:
A method and micro device for repositioning or retrieving miniature devices located in inaccessible areas, such as medical devices (e.g., stents, embolic coils, etc.) located in a blood vessel. The micro repositioning or retrieving device and method uses shape memory polymer (SMP) patches formed into mating geometries (e.g., a hoop and a hook) for re-attachment of the deposited medical device to a catheter or guidewire. For example, SMP or other material hoops are formed on the medical device to be deposited in a blood vessel, and SMP hooks are formed on the micro device attached to a guidewire, whereby the hooks on the micro device attach to the hoops on the medical device, or vice versa, enabling deposition, movement, re-deposit, or retrieval of the medical device. By changing the temperature of the SMP hooks, the hooks can be attached to or released from the hoops located on the medical device. An exemplary method for forming the hooks and hoops involves depositing a sacrificial thin film on a substrate, patterning and processing the thin film to form openings therethrough, depositing or bonding SMP materials in the openings so as to be attached to the substrate, and removing the sacrificial thin film.
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Fitch Joseph P.
Lee Abraham P.
Carnahan L. E.
Mancene Gene
Robert Eduardo C.
The Regents of the University of California
Thompson Alan H.
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