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Updated: Oct 7, 2025
06:53
Author Spotlight: Rapid Prototyping and Testing of Self-Expanding Nitinol Frames for Transcatheter Implantable Devices
Published on: March 7, 2025
463
Exploiting the Transformation Temperature to Reform an Infolded Nitinol Self-Expanding Peripheral Stent
Giorgio A Medranda1, Brian J Forrestal1, Brian C Case1
1Section of Interventional Cardiology, MedStar Heart and Vascular Institute, MedStar Washington Hospital Center, Washington, DC, USA.
Summary
A deformed nitinol stent was successfully repaired using iced saline to exploit its temperature-dependent properties. This innovative technique restored the self-expanding stent
Area of Science:
- Biomaterials Science
- Cardiovascular Interventions
- Medical Device Engineering
Background:
- Nickel-titanium (nitinol) alloys exhibit unique superelastic properties crucial for self-expanding peripheral stents.
- Stent deformation can compromise treatment efficacy and patient outcomes.
Observation:
- A case of an elderly male patient with a deformed nitinol self-expanding stent in the iliac artery following COVID-19 recovery.
- The nitinol stent underwent infolding, leading to recurrent myocardial infarction.
Findings:
- A novel technique utilizing iced saline to cool the nitinol stent to its transformation temperature was employed.
- This cooling maneuver, combined with balloon angioplasty, successfully restored the stent's original shape and patency.
Implications:
- This case demonstrates a new, non-surgical method for treating deformed nitinol stents.
- Exploiting nitinol's transformation temperature offers a promising approach for managing stent-related complications.
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