Semi-automatic cannulation device or manually triggered self- propelled catheter cannulation device

摘要

An improved intravascular catheter placement device including a hollow needle, an intravascular catheter concentric with said hollow needle, a chamber in communication with said hollow needle wherein the pressure within said chamber is a manually created vacuum pressure. A self- propelling apparatus is also included for moving said catheter into a blood vessel upon sensing penetration of the wall of the blood vessel by the tip of the hollow needle.