Shape memory polymer (SMP) gripper with a release sensing system
- Pleasant Hill, CA
- Walnut Creek, CA
- Concord, CA
- Danville, CA
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.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 6102917
- OSTI ID:
- 873151
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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
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