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Title: Reticulation of low density shape memory polymer foam with an in vivo demonstration of vascular occlusion

Abstract

Recently, predominantly closed-cell low density shape memory polymer (SMP) foam was reported to be an effective aneurysm filling device in a porcine model (Rodriguez et al., Journal of Biomedical Materials Research Part A 2013: (http://dx.doi.org/10.1002/jbm.a.34782)). Because healing involves blood clotting and cell migration throughout the foam volume, a more open-cell structure may further enhance the healing response. This research sought to develop a non-destructive reticulation process for this SMP foam to disrupt the membranes between pore cells. Non-destructive mechanical reticulation was achieved using a gravity-driven floating nitinol pin array coupled with vibratory agitation of the foam and supplemental chemical etching. Lastly, reticulation resulted in a reduced elastic modulus and increased permeability, but did not impede the shape memory behavior. Reticulated foams were capable of achieving rapid vascular occlusion in an in vivo porcine model.

Authors:
 [1];  [2];  [1];  [1];  [1];  [3];  [3];  [3];  [1];  [1];  [1]
  1. Texas A & M Univ., College Station, TX (United States)
  2. Texas A & M Univ., College Station, TX (United States). Inst. for Preclinical Studies
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Institutes of Health (NIH)
OSTI Identifier:
1763946
Alternate Identifier(s):
OSTI ID: 1282115; OSTI ID: 1556639
Report Number(s):
LLNL-JRNL-651670
Journal ID: ISSN 1751-6161; 772029
Grant/Contract Number:  
AC52-07NA27344; R01EB000462
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Mechanical Behavior of Biomedical Materials
Additional Journal Information:
Journal Volume: 40; Journal Issue: na; Journal ID: ISSN 1751-6161
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 59 BASIC BIOLOGICAL SCIENCES

Citation Formats

Rodriguez, Jennifer N., Miller, Matthew W., Boyle, Anthony, Horn, John, Yang, Cheng-Kang, Wilson, Thomas S., Ortega, Jason M., Small, Ward, Nash, Landon, Skoog, Hunter, and Maitland, Duncan J. Reticulation of low density shape memory polymer foam with an in vivo demonstration of vascular occlusion. United States: N. p., 2014. Web. doi:10.1016/j.jmbbm.2014.07.037.
Rodriguez, Jennifer N., Miller, Matthew W., Boyle, Anthony, Horn, John, Yang, Cheng-Kang, Wilson, Thomas S., Ortega, Jason M., Small, Ward, Nash, Landon, Skoog, Hunter, & Maitland, Duncan J. Reticulation of low density shape memory polymer foam with an in vivo demonstration of vascular occlusion. United States. https://doi.org/10.1016/j.jmbbm.2014.07.037
Rodriguez, Jennifer N., Miller, Matthew W., Boyle, Anthony, Horn, John, Yang, Cheng-Kang, Wilson, Thomas S., Ortega, Jason M., Small, Ward, Nash, Landon, Skoog, Hunter, and Maitland, Duncan J. Mon . "Reticulation of low density shape memory polymer foam with an in vivo demonstration of vascular occlusion". United States. https://doi.org/10.1016/j.jmbbm.2014.07.037. https://www.osti.gov/servlets/purl/1763946.
@article{osti_1763946,
title = {Reticulation of low density shape memory polymer foam with an in vivo demonstration of vascular occlusion},
author = {Rodriguez, Jennifer N. and Miller, Matthew W. and Boyle, Anthony and Horn, John and Yang, Cheng-Kang and Wilson, Thomas S. and Ortega, Jason M. and Small, Ward and Nash, Landon and Skoog, Hunter and Maitland, Duncan J.},
abstractNote = {Recently, predominantly closed-cell low density shape memory polymer (SMP) foam was reported to be an effective aneurysm filling device in a porcine model (Rodriguez et al., Journal of Biomedical Materials Research Part A 2013: (http://dx.doi.org/10.1002/jbm.a.34782)). Because healing involves blood clotting and cell migration throughout the foam volume, a more open-cell structure may further enhance the healing response. This research sought to develop a non-destructive reticulation process for this SMP foam to disrupt the membranes between pore cells. Non-destructive mechanical reticulation was achieved using a gravity-driven floating nitinol pin array coupled with vibratory agitation of the foam and supplemental chemical etching. Lastly, reticulation resulted in a reduced elastic modulus and increased permeability, but did not impede the shape memory behavior. Reticulated foams were capable of achieving rapid vascular occlusion in an in vivo porcine model.},
doi = {10.1016/j.jmbbm.2014.07.037},
journal = {Journal of the Mechanical Behavior of Biomedical Materials},
number = na,
volume = 40,
place = {United States},
year = {Mon Dec 01 00:00:00 EST 2014},
month = {Mon Dec 01 00:00:00 EST 2014}
}

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Cited by: 32 works
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Works referenced in this record:

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Works referencing / citing this record:

Advances in Biomaterials and Technologies for Vascular Embolization
journal, June 2019

  • Hu, Jingjie; Albadawi, Hassan; Chong, Brian W.
  • Advanced Materials, Vol. 31, Issue 33
  • DOI: 10.1002/adma.201901071

Multifunctional Shape-Memory Polymer Foams with Bio-inspired Antimicrobials
journal, December 2017

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Porous shape memory polymers: Design and applications
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Shape-morphing composites with designed micro-architectures
journal, June 2016

  • Rodriguez, Jennifer N.; Zhu, Cheng; Duoss, Eric B.
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Shape-morphing composites with designed micro-architectures
journal, June 2016

  • Rodriguez, Jennifer N.; Zhu, Cheng; Duoss, Eric B.
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