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Related Experiment Videos

Evaluation of guidewire path reproducibility.

Sebastian Schafer1, Kenneth R Hoffmann, Peter B Noël

  • 1Department of Mechanical and Aerospace Engineering and Toshiba Stroke Research Center, SUNY at Buffalo, Buffalo, New York 14214, USA. schafer3@buffalo.edu

Medical Physics
|June 20, 2008
PubMed
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Guidewire paths in vascular interventions are reproducible across users but vary with material. This study investigated guidewire path reproducibility in phantom models to improve device guidance during minimally invasive procedures.

Area of Science:

  • Medical Imaging
  • Biomedical Engineering
  • Interventional Radiology

Background:

  • Minimally invasive vascular interventions are increasing, relying heavily on guidewires for device delivery.
  • Clinicians face challenges with guidewire placement and device navigation during these procedures.
  • Understanding guidewire path reproducibility is crucial for improving procedural success and patient outcomes.

Purpose of the Study:

  • To investigate the reproducibility of guidewire paths in realistic vessel phantom models.
  • To assess the influence of user, guidewire material, and vessel geometry on guidewire path reproducibility.
  • To provide foundational data for enhancing guidewire and device guidance in vascular interventions.

Main Methods:

  • Three tortuous vascular phantoms mimicking the internal carotid artery were created.

Related Experiment Videos

  • Trained users repeatedly inserted two different guidewires (plastic-coated and steel) under pulsatile flow.
  • 3D imaging (rotational c-arm) and image processing were used to reconstruct and analyze guidewire and vessel paths.

    • Main Results:

    • Guidewire paths demonstrated high reproducibility across different users.
    • Significant variability in guidewire path reproducibility was observed based on guidewire material.
    • Average root mean square differences ranged from 0.17 mm (plastic-coated) to 1.15 mm (steel vs. plastic-coated).

    Conclusions:

    • Guidewire path shape and position are highly reproducible for a given guidewire type across users.
    • Guidewire material significantly impacts path reproducibility, suggesting material choice is critical.
    • These findings offer insights into optimizing guidewire selection and usage for improved interventional outcomes.