Cited by 332Advanced Materials and MechanicsPhotodynamic Therapy Research StudiesLaser and Thermal Forming Techniques

Photothermal properties of shape memory polymer micro‐actuators for treating stroke*

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Maitland, Duncan J., Metzger, Melodie F., Schumann, Daniel, Lee, Abraham, Wilson, Thomas S.·2002·Lasers in Surgery and Medicine

Abstract

Background and Objectives: 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. Materials and Methods: A total of three devices will be presented: two interventional ischemic stroke devices (coil and umbrella) and one device for releasing embolic coils (microgripper). 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. Results: Actuating the devices requires device temperatures in the range of 65–85°C. Attaining these temperatures under flow conditions requires critical engineering of the SMP optical properties, optical coupling into the SMP, and device geometries. Conclusion: 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 from the diffusing fiber through the blood into the SMP. Lasers Surg. Med. 30:1–11, 2002. © 2002 Wiley‐Liss, Inc.

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  1. [11]11. Connors JJ and Wojak JC. Intracranial Aneurysms: General Considerations. In: Connors JJ and Wojak JC, eds. Xnterventional Neuroradiology. Philadelphia, PA. 1999 pp. 276-294.
  2. [13]13. W. Wang and L. Zhang.Recovery as a Measure of Oriented Crystalline Structure in Poly(ether ester)s Based on Poly(ethy1ene oxide) and Poly(ethy1ene terephthalate) used as Shape Memory Polymers. J Pol Sci B: Pol Phy. 1999,37: 101.
  3. [14]14. Hayashi S and Shirai Y. Mitsubishi Technical Bulletin No. 184, December 1988.
  4. [19]19. Ratner BD and Hoffman AS. Thin Films Grafts and Coatings. In: Ratner BD, Hoffman AS, Schoen FJ, Lemons JE, eds. Introduction to Materials in Medicine. New York: Academic Press 1996.
  5. [25]25. Maitland DJ, Walsh JT, Jr. Quantitative measurements of linear birefringence during the heating of native collagen. Lasers Surg Med 1997; 20: 3 10-318,

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Authors
Maitland, D. J., Metzger, M. F., Schumann, D., Lee, A., & Wilson, T. S.
Affiliations
Lawrence Livermore National Laboratory (US)
Corresponding author
Maitland, Duncan J.
Venue
Lasers in Surgery and Medicine
Publisher
Wiley
Published
2002-01
Volume
30
Issue
1
Pages
1-11
ISSN
  • 0196-8092 (ISSN-L)
  • 1096-9101
OpenAlex
W2046465854
Cited by
332
References
18
Citations by year
2026: 3 · 2025: 7 · 2024: 8 · 2023: 7 · 2022: 10 · 2021: 16 · 2020: 19 · 2019: 14 · 2018: 19 · 2017: 17 · 2016: 26 · 2015: 33 · 2014: 17 · 2013: 19 · 2012: 18
FWCI
12.21
Type
journal article
Language
en
Open access
Locations
  • Lasers in Surgery and Medicine (publishedVersion)
  • PubMed (publishedVersion)
  • University of North Texas Digital Library (University of North Texas) (submittedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
Lawrence Livermore National Laboratory
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
  • Physical Sciences › Engineering › Computational Mechanics › Laser and Thermal Forming Techniques
Keywords
shape memory polymers, photothermal properties, microactuators, ischemic stroke, intravascular devices, optical coupling, laser heating, microgripper
MeSH terms
Intracranial Aneurysm, Chemistry, Physical, Embolization, Therapeutic, Hot Temperature, Humans, Lasers, Models, Cardiovascular, Models, Structural, Polymers, Thermodynamics, Stroke, Optics and Photonics, Chemical Phenomena

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