Extraction catheter has tip wall divided into three identical sections made of self-expanding material acting as braces and interstices filled with elastic material

摘要

The tip of the extraction catheter (1) has its wall divided into three sections forming a self-expanding funnel as braces (3) . The interstices between the funnel-braces are tensioned by elastic foldable material (4). The insertion appliance (2) folds in the funnel by inverting it from behind.