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Title: Shape memory polymer (SMP) gripper with a release sensing system

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.

Inventors:
 [1];  [2];  [3];  [4]
  1. Pleasant Hill, CA
  2. Walnut Creek, CA
  3. Concord, CA
  4. Danville, CA
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873151
Patent Number(s):
US 6102917
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:
shape; memory; polymer; smp; gripper; release; sensing; releasing; target; material; embolic; coil; located; catheter; utilizing; optical; arrangement; laser; driver; display; panel; photodetector; fiber; optics; coupler; connectors; smp-based; feedback; heated; via; light; optic; causing; therapeutic; treatment; aneurysms; various; embodiments; provided; coupling; specific; positioning; coils; removal; cladding; adjacent; metal; coating; doping; gradient; absorbing; dye; tapering; refractive; index; locating; insert; various embodiments; optic fiber; fiber optics; fiber optic; laser light; refractive index; metal coating; shape memory; target material; memory polymer; optical arrangement; embolic coil; feedback arrangement; display panel; target mater; via laser; laser driver; /606/

Citation Formats

Maitland, Duncan J, Lee, Abraham P, Schumann, Daniel L, and Silva, Luiz Da. Shape memory polymer (SMP) gripper with a release sensing system. United States: N. p., 2000. Web.
Maitland, Duncan J, Lee, Abraham P, Schumann, Daniel L, & Silva, Luiz Da. Shape memory polymer (SMP) gripper with a release sensing system. United States.
Maitland, Duncan J, Lee, Abraham P, Schumann, Daniel L, and Silva, Luiz Da. Sat . "Shape memory polymer (SMP) gripper with a release sensing system". United States. https://www.osti.gov/servlets/purl/873151.
@article{osti_873151,
title = {Shape memory polymer (SMP) gripper with a release sensing system},
author = {Maitland, Duncan J and Lee, Abraham P and Schumann, Daniel L and Silva, Luiz Da},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/873151}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

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