Method and apparatus for forming apertures in blood vessels

摘要

Hole forming apparatus for forming an opening in a blood vessel, comprising: a penetration head having a sharp tip adapted to be inserted through a wall of a blood vessel; a base section defining an inner lumen; at least one cutting surface defined on said base section and adapted to cut through a wall of said blood vessel without said apparatus pulling said blood vessel towards said cutting surface; and a shaft mechanically coupling said penetration head to said base section, said shaft defining a tissue holding shaft section between said base section and said penetration head, said penetration head adapted to prevent tissue transfixed on said shaft section from slipping off said penetration head, said shaft having a first mechanically defined and axially locked resting position in which said penetration head is at least partially enclosed by said base section in said inner lumen and a second mechanically defined resting position in which said penetration head is axially locked relative to said base section and said shaft section is exposed between said base section and said penetration head.