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Revisiting SFA stent technology: an updated overview on mechanical stent performance

  • Wolfram Schmidt EMAIL logo , Christoph Brandt-Wunderlich , Peter Behrens , Christoph Kopetsch , Klaus-Peter Schmitz , Julian Ramin Andresen and Niels Grabow
Published/Copyright: May 15, 2023
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Biomedical Engineering / Biomedizinische Technik
From the journal Biomedical Engineering / Biomedizinische Technik Volume 68 Issue 5

Abstract

Objectives

The study investigated mechanical parameters of stent systems indicated for treatment of femoropopliteal (FP) arterial disease to support interpretation of clinical results and the related causalities.

Methods

Eight stent system types of same dimensions were investigated (n=2). Parameters were the profile of stent delivery system (SDS), radiopacity, trackability and pushability, bending stiffness (flexibility) and axial stiffness of expanded stents, length change during expansion, radial force, crush resistance, strut thickness and general surface condition.

Results

The trackability ranged from 0.237 to 0.920 N and the pushability was 47.9–67.6 %. The bending stiffness of SDS was between 108.42 and 412.68 N mm2. The length change during stent release to 5 mm was low, with one exception. The bending stiffness of the expanded stents was 2.73–41.67 N mm2. The normalized radial forces at 5 mm diameter ranged from 0.133 N/mm to 0.503 N/mm. During non-radial compression by 50 %, the forces were 3.07–8.42 N, with one exception (58.7 N). The strut thickness was 153–231 µm.

Conclusions

Large differences occurred for flexibility, radial force and length change during expansion. The data should be used when choosing the proper device for restoring vascular function.

Keywords: biomedical engineering; implant technology; vascular intervention
Corresponding author: Wolfram Schmidt, University Medical Center Rostock, Institute for Biomedical Engineering, Friedrich-Barnewitz-Str. 4, 18119 Rostock, Germany, E-mail:

Funding source: German Federal Ministry of Education and Research (BMBF)

Award Identifier / Grant number: RESPONSE

Acknowledgments

The authors thank the staff of the Testing Laboratory for Cardio + Vascular Devices at the Institute for ImplantTechnology and Biomaterials – IIB e.V. for assistance in performing the presented measurements.

  1. Research funding: Financial support by the German Federal Ministry of Education and Research (BMBF) within RESPONSE “Partnership for Innovation in Implant Technology” is gratefully acknowledged. The funding organization played no role in the study design, the collection, analysis and interpretation of data, in the writing of the report, or in the decision to submit the report for publication.

  2. Author contribution: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  3. Competing interests: Authors state no conflict of interest.

  4. Informed consent: Not applicable.

  5. Ethical approval: Not applicable.

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Received: 2022-10-21
Accepted: 2023-04-28
Published Online: 2023-05-15
Published in Print: 2023-10-26

© 2023 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/bmt-2022-0412
Keywords for this article
biomedical engineering; implant technology; vascular intervention

Articles in the same Issue

  1. Frontmatter
  2. Review
  3. Research frontiers of electroporation-based applications in cancer treatment: a bibliometric analysis
  4. Research Articles
  5. Deep neural network to differentiate internet gaming disorder from healthy controls during stop-signal task: a multichannel near-infrared spectroscopy study
  6. A low power respiratory sound diagnosis processing unit based on LSTM for wearable health monitoring
  7. Effective deep learning classification for kidney stone using axial computed tomography (CT) images
  8. De- and recellularized urethral reconstruction with autologous buccal mucosal cells implanted in an ovine animal model
  9. The impact of right ventricular hemodynamics on the performance of a left ventricular assist device in a numerical simulation model
  10. Optimal assist strategy exploration for a direct assist device under stress‒strain dynamics
  11. Revisiting SFA stent technology: an updated overview on mechanical stent performance
  12. Parameter-based patient-specific restoration of physiological knee morphology for optimized implant design and matching
  13. Influences of smart glasses on postural control under single- and dual-task conditions for ergonomic risk assessment
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