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Technical Brief

Design and Characterization of a Resistively Heated Shape Memory Polymer Micro-Release Device1

[+] Author and Article Information
Landon D. Nash, Mark A. Wierzbicki

Department of Biomedical Engineering,
Texas A&M University,
5045 Emerging Technologies,
Building 3120 TAMU,
College Station, TX 77843

Duncan J. Maitland

Department of Biomedical Engineering,
Texas A&M University,
5045 Emerging Technologies,
Building 3120 TAMU,
College Station, TX 77843

Accepted and presented at the Design of Medical Devices Conference (DMD2014), Minneapolis, MN, April 7–10, 2014.

Manuscript received February 21, 2014; final manuscript received February 28, 2014; published online April 28, 2014. Editor: Arthur G. Erdman.

J. Med. Devices 8(2), 020911 (Apr 28, 2014) (2 pages) Paper No: MED-14-1040; doi: 10.1115/1.4027011 History: Received February 21, 2014; Revised February 28, 2014

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References

Lendlein, A., and Langer, R., 2002, “Biodegradable, Elastic Shape-Memory Polymers for Potential Biomedical Applications,” Science, 296(5573), pp. 1673–1676. [CrossRef]
Maitland, D. J., Small, W., Ortega, J. M., Buckley, P. R., Rodriguez, J., Hartman, J., and Wilson, T. S., 2007, “Prototype Laser-Activated Shape Memory Polymer Foam Device for Embolic Treatment Of Aneurysms,” J. Biomed. Opt., 12(3), p. 030504. [CrossRef]
Baer, G. M., Small, W., Wilson, T. S., Benett, W. J., Matthews, D. L., Hartman, J., and Maitland, D. J., 2007, “Fabrication and In Vitro Deployment of a Laser-Activated Shape Memory Polymer Vascular Stent,” Biomed. Eng. Online, 6, p. 43. [CrossRef]
Holdsworth, D. W., Norley, C. J. D., Frayne, R., Steinman, D. A., and Rutt, B. K., 1999, “Characterization of Common Carotid Artery Blood-Flow Waveforms in Normal Human Subjects,” Physiol. Meas., 20(3), pp. 219–240. [CrossRef]
Han, M. H., Kwon, O. K., Yoon, C. J., Kwon, B. J., Cha, S. H., and Chang, K. H., 2003, “Gas Generation and Clot Formation During Electrolytic Detachment of Guglielmi Detachable Coils: In Vitro Observations and Animal Experiment,” Am. J. Neuroradiol., 24(3), pp. 539–544. [CrossRef]
Ortega, J., Maitland, D., Wilson, T., Tsai, W., Savas, O., and Saloner, D., 2007, “Vascular Dynamics of a Shape Memory Polymer Foam Aneurysm Treatment Technique,” Ann. Biomed. Eng., 35(11), pp. 1870–1884. [CrossRef]

Figures

Grahic Jump Location
Fig. 1

(a) The implant side of the release mechanism. (b) The programmed SMP tube is placed over the heating coil of the release mechanism. (c) The final junction between the implant and heating coil after crimping the SMP tube. (d) The proximal end of the device.

Grahic Jump Location
Fig. 2

Top: sequenced images depicting device actuation. Asterisks identify the expanded portion of the SMP tube. Bottom: temperature at each stage of release.

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