skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Shape memory alloy/shape memory polymer tools

Abstract

Micro-electromechanical tools for minimally invasive techniques including microsurgery. These tools utilize composite shape memory alloy (SMA), shape memory polymer (SMP) and combinations of SMA and SMP to produce catheter distal tips, actuators, etc., which are bistable. Applications for these structures include: 1) a method for reversible fine positioning of a catheter tip, 2) a method for reversible fine positioning of tools or therapeutic catheters by a guide catheter, 3) a method for bending articulation through the body's vasculature, 4) methods for controlled stent delivery, deployment, and repositioning, and 5) catheters with variable modulus, with vibration mode, with inchworm capability, and with articulated tips. These actuators and catheter tips are bistable and are opportune for in vivo usage because the materials are biocompatible and convenient for intravascular use as well as other minimal by invasive techniques.

Inventors:
;
Issue Date:
Research Org.:
Univ. of California, Oakland, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175293
Patent Number(s):
6872433
Application Number:
09/819,111
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61B - DIAGNOSIS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
DOE Contract Number:  
W7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Seward, Kirk P., and Krulevitch, Peter A. Shape memory alloy/shape memory polymer tools. United States: N. p., 2005. Web.
Seward, Kirk P., & Krulevitch, Peter A. Shape memory alloy/shape memory polymer tools. United States.
Seward, Kirk P., and Krulevitch, Peter A. Tue . "Shape memory alloy/shape memory polymer tools". United States. https://www.osti.gov/servlets/purl/1175293.
@article{osti_1175293,
title = {Shape memory alloy/shape memory polymer tools},
author = {Seward, Kirk P. and Krulevitch, Peter A.},
abstractNote = {Micro-electromechanical tools for minimally invasive techniques including microsurgery. These tools utilize composite shape memory alloy (SMA), shape memory polymer (SMP) and combinations of SMA and SMP to produce catheter distal tips, actuators, etc., which are bistable. Applications for these structures include: 1) a method for reversible fine positioning of a catheter tip, 2) a method for reversible fine positioning of tools or therapeutic catheters by a guide catheter, 3) a method for bending articulation through the body's vasculature, 4) methods for controlled stent delivery, deployment, and repositioning, and 5) catheters with variable modulus, with vibration mode, with inchworm capability, and with articulated tips. These actuators and catheter tips are bistable and are opportune for in vivo usage because the materials are biocompatible and convenient for intravascular use as well as other minimal by invasive techniques.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {3}
}

Patent:

Save / Share:

Works referenced in this record:

Thin film shape memory alloy microactuators
journal, January 1996


Thermomechanical Constitutive Modeling in Shape Memory Polymer of Polyurethane Series
journal, August 1997


Mechanical Properties of Shape Memory Polymer of Polyurethane Series : Basic Characteristics of Stress-Strain-Temperature Relationship
journal, January 1992