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Title: Microfabricated therapeutic actuators

Abstract

Microfabricated therapeutic actuators are fabricated using a shape memory polymer (SMP), a polyurethane-based material that undergoes a phase transformation at a specified temperature (Tg). At a temperature above temperature Tg material is soft and can be easily reshaped into another configuration. As the temperature is lowered below temperature Tg the new shape is fixed and locked in as long as the material stays below temperature Tg. Upon reheating the material to a temperature above Tg, the material will return to its original shape. By the use of such SMP material, SMP microtubing can be used as a release actuator for the delivery of embolic coils through catheters into aneurysms, for example. The microtubing can be manufactured in various sizes and the phase change temperature Tg is determinate for an intended temperature target and intended use. 8 figs.

Inventors:
; ; ; ;
Issue Date:
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6478506
Patent Number(s):
5911737
Application Number:
PPN: US 8-807412
Assignee:
Univ. of California, Oakland, CA (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Patent File Date: 28 Feb 1997
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; ACTUATORS; FABRICATION; MEDICAL SUPPLIES; MEDICINE; POLYMERS; SHAPE MEMORY EFFECT; TEMPERATURE DEPENDENCE; 550600* - Medicine

Citation Formats

Lee, A P, Northrup, M A, Ciarlo, D R, Krulevitch, P A, and Benett, W J. Microfabricated therapeutic actuators. United States: N. p., 1999. Web.
Lee, A P, Northrup, M A, Ciarlo, D R, Krulevitch, P A, & Benett, W J. Microfabricated therapeutic actuators. United States.
Lee, A P, Northrup, M A, Ciarlo, D R, Krulevitch, P A, and Benett, W J. Tue . "Microfabricated therapeutic actuators". United States.
@article{osti_6478506,
title = {Microfabricated therapeutic actuators},
author = {Lee, A P and Northrup, M A and Ciarlo, D R and Krulevitch, P A and Benett, W J},
abstractNote = {Microfabricated therapeutic actuators are fabricated using a shape memory polymer (SMP), a polyurethane-based material that undergoes a phase transformation at a specified temperature (Tg). At a temperature above temperature Tg material is soft and can be easily reshaped into another configuration. As the temperature is lowered below temperature Tg the new shape is fixed and locked in as long as the material stays below temperature Tg. Upon reheating the material to a temperature above Tg, the material will return to its original shape. By the use of such SMP material, SMP microtubing can be used as a release actuator for the delivery of embolic coils through catheters into aneurysms, for example. The microtubing can be manufactured in various sizes and the phase change temperature Tg is determinate for an intended temperature target and intended use. 8 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {6}
}