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Title: Micro devices using shape memory polymer patches for mated connections

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.

Inventors:
 [1];  [2]
  1. Walnut Creek, CA
  2. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873080
Patent Number(s):
6086599
Assignee:
Regents of University of California (Oakland, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
micro; devices; shape; memory; polymer; patches; mated; connections; method; device; repositioning; retrieving; miniature; located; inaccessible; medical; stents; embolic; coils; etc; blood; vessel; smp; formed; mating; geometries; hoop; hook; re-attachment; deposited; catheter; guidewire; example; material; hoops; hooks; attached; whereby; attach; vice; versa; enabling; deposition; movement; re-deposit; retrieval; changing; temperature; released; exemplary; forming; involves; depositing; sacrificial; film; substrate; patterning; processing; form; openings; therethrough; bonding; materials; removing; blood vessel; shape memory; memory polymer; vice versa; medical device; medical devices; micro device; smp material; embolic coils; device attached; openings therethrough; exemplary method; embolic coil; devices located; /606/

Citation Formats

Lee, Abraham P, and Fitch, Joseph P. Micro devices using shape memory polymer patches for mated connections. United States: N. p., 2000. Web.
Lee, Abraham P, & Fitch, Joseph P. Micro devices using shape memory polymer patches for mated connections. United States.
Lee, Abraham P, and Fitch, Joseph P. Sat . "Micro devices using shape memory polymer patches for mated connections". United States. https://www.osti.gov/servlets/purl/873080.
@article{osti_873080,
title = {Micro devices using shape memory polymer patches for mated connections},
author = {Lee, Abraham P and Fitch, Joseph P},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

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