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Nitinol micro-forceps for retrieval of intravascular objects: first in vitro experiences
F Schellhammer1, M Zahringer, K Lackner
1Institut und Poliklinik für Radiologische Diagnostik, lindenthal, Germany. Frank.Schellhammer@uni-koeln.de
Investigative Radiology
|September 28, 2002
Summary
A new nitinol micro-forceps shows promise for retrieving intravascular objects during interventional procedures. While effective in grasping coils, further modifications are needed to enhance maneuverability and grasping strength in endovascular retrieval.
Area of Science:
- Interventional Cardiology
- Biomedical Engineering
- Vascular Surgery
Background:
- The increasing complexity of interventional procedures necessitates effective methods for removing iatrogenic materials.
- Retrieval of intravascular objects is a critical aspect of patient safety in endovascular interventions.
Purpose of the Study:
- To introduce and evaluate a novel nitinol micro-forceps for the retrieval of intravascular objects.
- To assess the in-vitro efficacy of the micro-forceps in a simulated arterial environment.
Main Methods:
- An in-vitro tube model simulating arterial anatomy was used.
- Eight endovascular coils were targeted for retrieval from a "carotid artery" model via a "trans-femoral" approach.
- The successful withdrawal of grasped coils through vascular sheaths (F-5, F-6, F-8, F-12) was observed.
Main Results:
- The nitinol micro-forceps successfully grasped seven out of eight endovascular coils.
- One coil was lost during the retrieval process.
- Successful withdrawal through vascular sheaths was contingent upon grasping the coil at one of its ends.
Conclusions:
- The nitinol micro-forceps demonstrates potential as a tool for endovascular retrieval of foreign objects, particularly in small-caliber vessels.
- Further technical refinements are required to optimize maneuverability and grasping strength for broader clinical application.