Share Email Print
cover

Proceedings Paper

Laser-activated shape memory polymer microactuators for treating stroke
Author(s): Duncan J. Maitland; Thomas Wilson; Melodie Metzger; Daniel L. Schumann
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In this paper the photothermal engineering issues of novel shape memory polymer (SMP) microactuators for treating stroke are presented. The engineering issues for using lasers to heat and subsequently actuate these SMP devices are presented in order to provide design criteria and guidelines for intravascular, laser activated SMP devices. The optical properties of SMP, methods for coupling laser light into SMP, heating distributions in the SMP devices and the impact of operating the thermally activated material in a blood vessel are presented. A total of three devices will be presented: two interventional ischemic stroke devices and one device for releasing embolic coils. The optical properties of SMP, methods for coupling laser light into SMP, heating distributions in the SMP devices and the impact of operating the thermally activated material in a blood vessel are presented. Actuating the devices requires device temperatures in the range of 65 degrees C - 85 degrees C. Attaining these temperatures under flow conditions requires critical engineering of the SMP optical properties, optical coupling into the SMP, and device geometries. Laser- activated SMP devices are a unique combination of laser- tissue and biomaterial technologies. Successful deployment of the microactuator requires well-engineered coupling of the light form the diffusing fiber through the blood into the SMP.

Paper Details

Date Published: 21 June 2002
PDF: 9 pages
Proc. SPIE 4626, Biomedical Nanotechnology Architectures and Applications, (21 June 2002); doi: 10.1117/12.472105
Show Author Affiliations
Duncan J. Maitland, Lawrence Livermore National Lab. (United States)
Thomas Wilson, Lawrence Livermore National Lab. (United States)
Melodie Metzger, Lawrence Livermore National Lab. (United States)
Daniel L. Schumann, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 4626:
Biomedical Nanotechnology Architectures and Applications
Raymond P. Mariella; Catherine J. Murphy; Michelle Palmer; David A. Dunn; Darryl J. Bornhop; David A. Dunn; Raymond P. Mariella; Catherine J. Murphy; Dan V. Nicolau; Shuming Nie; Michelle Palmer; Ramesh Raghavachari; Darryl J. Bornhop; Ramesh Raghavachari; Shuming Nie; Ramesh Raghavachari, Editor(s)

© SPIE. Terms of Use
Back to Top