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Related Experiment Video

Updated: Jul 29, 2025

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold
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Shape memory polymer technology in peripheral vascular embolization.

Andrew Holden1, Andrew A Hill2, Brendan T Buckley1

  • 1Department of Radiology, Auckland City Hospital, Auckland, New Zealand.

Vascular
|May 23, 2023
PubMed
Summary
This summary is machine-generated.

Shape memory polymer vascular plugs offer a safe and effective embolization solution. This study shows no serious adverse events or recanalization in patients over a mean follow-up of 22.2 months.

Keywords:
Shape memory polymerendoleakendovascular aneurysm repairgonadal veinperipheral embolizationvascular plug

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Area of Science:

  • Vascular surgery
  • Interventional radiology
  • Biomaterials science

Background:

  • Shape memory polymers (SMPs) are novel biomaterials with dual stable shapes, enabling crimped delivery and expanded vessel occlusion.
  • These porous, radiolucent SMP vascular plugs are designed for embolization, offering hemostasis and potential for tissue integration.
  • Preclinical studies indicated that SMP scaffolds support tissue ingrowth and are bioabsorbable.

Purpose of the Study:

  • To evaluate the clinical safety and efficacy of novel shape memory polymer vascular embolization devices.
  • To assess the performance of SMP vascular plugs in various peripheral embolization procedures.
  • To determine the long-term patency and safety profile of SMP embolization over extended follow-up.

Main Methods:

  • A prospective, single-arm safety study conducted at a single center in New Zealand.
  • Ten male patients received a single pushable SMP vascular plug with a nitinol anchor and radiopaque marker.
  • Follow-up included 30-day clinical assessment and retrospective imaging review for up to 44 months.

Main Results:

  • Acute technical success was achieved in all 10 embolization cases, treating diverse vessels including mesenteric, renal, iliac, subclavian, and testicular veins.
  • No serious adverse events related to the study device were reported within the 30-day follow-up period.
  • Retrospective imaging review demonstrated no evidence of vessel recanalization at a mean follow-up of 22.2 months.

Conclusions:

  • Shape memory polymer vascular embolization devices demonstrated safety and effectiveness in this small cohort.
  • The study supports the use of SMP vascular plugs for peripheral embolization with promising long-term patency.
  • Further clinical experience and longer follow-up are warranted to fully establish the applicability of this novel technology.