Nitinol micro-forceps for retrieval of intravascular objects: first in vitro experiences.

Abstract

With the progress of interventional procedures the need for retrieval of iatrogenic materials increases. Here we introduce a new nitinol micro-forceps for retrieval of intravascular objects and report our first in-vitro experiences. In a tube model simulating arterial anatomy a total of eight endovascular coils were removed from the "carotid artery" using a "trans-femoral" approach. Additionally, the withdrawal of grasped coils through vascular sheaths of F-5, F-6, F-8, F-12 was observed (n = 4/seize). Seven of 8 coils were successfully grasped. Loss of one coil occurred during retrieval. Withdrawal of coils through a vascular sheath was possible only when the coil was grasped at one of its ends. The nitinol micro-forceps proved to be a potential tool in endovascular retrieval of foreign objects especially in small caliber vessels. However, further technical modifications are necessary to improve maneuverability and grasping strength.