Laser-activated shape memory polymer microactuators for treating stroke

Duncan J. Maitland; Thomas Wilson; Melodie Metzger; Daniel L. Schumann

doi:10.1117/12.472105

21 June 2002 Laser-activated shape memory polymer microactuators for treating stroke

Duncan J. Maitland, Thomas Wilson, Melodie Metzger, Daniel L. Schumann

Proceedings Volume 4626, Biomedical Nanotechnology Architectures and Applications; (2002) https://doi.org/10.1117/12.472105
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

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.

Citation Download Citation

Duncan J. Maitland, Thomas Wilson, Melodie Metzger, and Daniel L. Schumann "Laser-activated shape memory polymer microactuators for treating stroke", Proc. SPIE 4626, Biomedical Nanotechnology Architectures and Applications, (21 June 2002); https://doi.org/10.1117/12.472105

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