Now showing items 1-20 of 21

    • Carbon Fillers for Actuation of Electroactive Thermoset Shape Memory Polyurethane Composites by Resistive Heating 

      Yu, Ya-Jen (2014-05-01)
      The shape memory polymer (SMP) is one type of smart material with shape memory effect. SMP’s recovery can be actuated by external energy, such as heat. However, traditional direct heating limits potential applications of ...
    • Characterization of Shape Memory Polymer Foam: Biocompatibility, Visualization and Hemodynamic Interactions 

      Rodriguez, Jennifer Nicole (2014-05-09)
      Cerebral aneurysms are unstable localized dilations of an artery wall located in the vasculature of the brain that are susceptible to rupture. Current treatments of aneurysms, both surgical and endovascular, involve isolation ...
    • Clot Kinetics in the Progression of Cerebral Vasospasm 

      Hackney, Erin Kathleen (2011-02-22)
      Cerebral vasospasm following subarachnoid hemorrhage has high morbidity and mortality. Mathematical modeling of the progression of the condition provides insight to improve clinical treatment of patients post subarachnoid ...
    • Development of Multilayer Vascular Grafts Based on Collagen-Mimetic Hydrogels 

      Browning, Mary Beth (2013-07-29)
      Current synthetic vascular grafts have high failure rates in small-diameter (<6 mm) applications due to inadequate cell-material interactions and poor matching of arterial biomechanical properties. To address this, we have ...
    • Device and method for treatment of openings in vascular and septal walls 

      Singhal, Pooja; Wilson, Thomas S.; Cosgriff-Hernandez, Elizabeth; Maitland, Duncan J. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2017-06-06)
      A device, system and method for treatment of an opening in vascular and/or septal walls including patent foramen ovale. The device has wings/stops on either end, an axis core covered in a shape memory foam and is deliverable ...
    • The Effect of Moisture Absorption on the Physical Properties of Polyurethane Shape Memory Polymer Foams 

      Yu, Ya-Jen (2012-07-16)
      The effect of moisture absorption on the glass transition temperature (Tg) and stress/strain behavior of network polyurethane shape memory polymer (SMP) foams has been investigated. With our ultimate goal of engineering ...
    • Expandable implant and implant system 

      Wilson, Thomas S.; Small, Ward IV; Benett, William J.; Ortega, Jason M.; Maitland, Duncan J.; Hartman, Jonathan (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2018-07-03)
      An embodiment of the invention includes an expandable implant to endovascularly embolize an anatomical void or malformation, such as an aneurysm. An embodiment is comprised of a chain or linked sequence of expandable polymer ...
    • Expandable implant and implant system 

      Wilson, Thomas S.; Small, Ward IV; Benett, William J.; Ortega, Jason M.; Maitland, Duncan J.; Hartman, Jonathan (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 1/26/2021)
      An embodiment of the invention includes an expandable implant to endovascularly embolize an anatomical void or malformation, such as an aneurysm. An embodiment is comprised of a chain or linked sequence of expandable polymer ...
    • Flow and Temperature Fields Generated by a Thermally Activated Interventional Vascular Device 

      McCurrin, Casey (2012-10-19)
      Concern for the nonphysiologic energy required to actuate medical devices utilizing “smart material” properties of shape memory polymer (SMP) compels a rigorous investigation into the flow and temperature fields surrounding ...
    • Hemorrhage management system 

      Maitland, Duncan J.; Landsman, Todd Lawrence; Touchet, Tyler Joseph; Cosgriff-Hernandez, Elizabeth L.; Wilson, Thomas S. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2019-04-23)
      An embodiment includes a wound dressing comprising: a shape memory polymer (SMP) foam, including open cells, having first and second states; and a hydrogel (HG) included within the cells; wherein (a) in a first position a ...
    • Mechanical characterization, modeling, and examination of a muscular intracranial and elastic extracranial artery with an emphasis on microstructure, residual stress, and smooth muscle cell activation 

      Wagner, Hallie (2012-07-16)
      Cerebrovascular disease continues to be responsible for significant morbidity and mortality. There is a pressing need to better understand the biomechanics of both intracranial arteries and the extracranial arteries that ...
    • Mechanical reticulation of polymeric-based closed cell foams 

      Rodriguez, Jennifer N.; Maitland, Duncan J.; Wilson, Thomas S. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2020-05-12)
      Polymeric based closed cell foams, such as shape memory polymer foams, contain bubbles. Making these bubbles continuous is called reticulation. Disclosed are embodiments of a device and method to controllably reticulate ...
    • Medical devices coated with shape memory polymer foams 

      Muschalek, Rachael; Hearon, Keith; Nash, Landon D.; Maitland, Duncan J. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2020-02-18)
      An embodiment includes a system comprising: a substrate of a medical device; an un-foamed polyurethane coating directly contacting the substrate and fixedly attached to the substrate; a thermoset polyurethane shape memory ...
    • Processable, tunable thio-ene crosslinked polyurethane shape memory polymers 

      Hearon, Keith; Nash, Landon D.; Wilson, Thomas; Maitland, Duncan J.; Wierzbicki, Mark A. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 8/4/2020)
      An embodiment includes a platform shape memory polymer system. Such an embodiment exhibits a blend of tunable, high performance mechanical attributes in combination with advanced processing capabilities and good biocompatibility. ...
    • Shape memory polymer nonocomposites and uses thereof 

      Hasan, Sayyeda Marziya; Rodriguez, Jennifer Nicole; Singhal, Pooja; Wilson, Thomas Stephen; Maitland, Duncan J. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 8/25/2020)
      The invention relates to radiopaque shape memory foam compositions and methods of using the compositions. In certain embodiments, the compositions are used in neurovascular occlusion applications.
    • Shape memory polymer vessel occlusion device 

      Maitland, Duncan J.; Landsman, Todd L.; Rodriguez, Jennifer N.; Boyle, Anthony J.; Glowczwski, Alan C.; Wierzbicki, Mark A. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 9/29/2020)
      An embodiment includes a system comprising: an outer conduit; a shape memory polymer (SMP) foam; a metal backbone including: (a)(i) a first portion that extends from the SMP foam proximal end to the SMP foam distal end and ...
    • Shape-memory polymer foam device for treating aneurysms 

      Ortega, Jason M.; Benett, William J.; Small, Ward; Wilson, Thomas S.; Maitland, Duncan J.; Hartman, Jonathan (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2017-05-30)
      A system for treating an aneurysm in a blood vessel or vein, wherein the aneurysm has a dome, an interior, and a neck. The system includes a shape memory polymer foam in the interior of the aneurysm between the dome and ...
    • Stented Artery Biomechanics: A Computational and In Vivo Analysis of Stent Design and Pathobiological Response 

      Timmins, Lucas Howard (2011-08-08)
      Vascular stents have become a standard for treating atherosclerosis due to distinct advantages in trauma and cost with other surgical techniques. Unfortunately, the therapy is hindered by the risk of a new blockage (termed ...
    • Surface modification of polymer foams using plasma 

      Nash, Landon D.; Maitland, Duncan J.; Docherty, Nicole; Wilson, Thomas S.; Small, Ward IV; Ortega, Jason; Singhal, Pooja (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 9/22/2020)
      An embodiment includes a system comprising: a monolithic shape memory polymer (SMP) foam having first and second states; wherein the SMP foam includes: (a) polyurethane, (b) an inner half portion having inner reticulated ...
    • Ultra low density biodegradable shape memory polymer foams with tunable physical properties 

      Singhal, Pooja; Wilson, Thomas S.; Cosgriff-hernandez, Elizabeth; Maitland, Duncan J. (United States. Patent and Trademark OfficeTexas A&M University. Libraries, 2017-12-12)
      Compositions and/or structures of degradable shape memory polymers (SMPs) ranging in form from neat/unfoamed to ultra low density materials of down to 0.005 g/cc density. These materials show controllable degradation rate, ...