Inductively heated shape memory polymer for the magnetic actuation of medical devices.

Inductively heated shape memory polymer for the magnetic actuation of medical devices. Research Abstract Details 

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Inductively heated shape memory polymer for the magnetic actuation of medical devices. Abstract Text:

Patrick R Buckley,Gareth H McKinley,Thomas S Wilson,Ward Small,William J Benett,Jane P Bearinger,Michael W McElfresh,Duncan J Maitland,

Presently, there is interest in making medical devices such as expandable stents and intravascular microactuators from shape memory polymer (SMP). One of the key challenges in realizing SMP medical devices is the implementation of a safe and effective method of thermally actuating various device geometries in vivo. A novel scheme of actuation by Curie-thermoregulated inductive heating is presented. Prototype medical devices made from SMP loaded with nickel zinc ferrite ferromagnetic particles were actuated in air by applying an alternating magnetic field to induce heating. Dynamic mechanical thermal analysis was performed on both the particle-loaded and neat SMP materials to assess the impact of the ferrite particles on the mechanical properties of the samples. Calorimetry was used to quantify the rate of heat generation as a function of particle size and volumetric loading of ferrite particles in the SMP. These tests demonstrated the feasibility of SMP actuation by inductive heating. Rapid and uniform heating was achieved in complex device geometries and particle loading up to 10% volume content did not interfere with the shape recovery of the SMP.

Inductively heated shape memory polymer for the magnetic actuation of medical devices. Publishing Authors By Initials

PR Buckley,GH McKinley,TS Wilson,W Small,WJ Benett,JP Bearinger,MW McElfresh,DJ Maitland,

For similar macromolecular substances: polymers research abstracts see: macromolecular substances: polymers research

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Inductively heated shape memory polymer for the magnetic actuation of medical devices. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: IEEE transactions on bio-medical engineering

VOLUME: 53

Page Numbers: 2075-83

Journal Abbreviation:

ISSN: 0018-9294

DAY: 3

MONTH: Oct

YEAR: 2006

Inductively heated shape memory polymer for the magnetic actuation of medical devices. Information

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LANGUAGE: eng

NlmUniqueID: 12737

Inductively heated shape memory polymer for the magnetic actuation of medical devices. Keywords Mesh Terms:

KEYWORDS: Polymers

MESH TERMS: radiation effects

Chemical & Substance for Abstract: Inductively heated shape memory polymer for the magnetic actuation of medical devices. Information

Substance Name: Polymers

Registry Number: 0

Grant and Affiliation Information for Inductively heated shape memory polymer for the magnetic actuation of medical devices.

AFFILIATION: Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. buckley@alum.mit.edu

Country: United States

AGENCY: United States NIBIB

GRANT: R01 EB000462

ACRONYM: EB

MEDLINETA: IEEE Trans Biomed Eng

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