Semi-automatic cannulation device

Details Semi-automatic cannulation device Semi-automatic cannulation device

1993-12-03

1996-01-02

Green, Randall L.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

606170, 604164, 604180, 604177, 604233, A61M 5178

Patent

active

054803888

ABSTRACT:
An improved intravascular catheter placement device for semi-automatic insertion, i.e. manually triggered self-propelled insertion, of an intravascular catheter into the interior of a blood vessel comprising 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 vacuum pressure and self-propelling means for moving said catheter into a blood vessel upon penetration of the wall of the blood vessel by the tip of the hollow needle.
The self-propelling means acting upon the catheter is manually actuated by the operator of the device upon visualization of the backflow of blood occurring upon penetration of the blood vessel by the tip of the needle, said backflow of blood being accelerated into said chamber by the vacuum pressure present within said chamber.
As a result of the combination of accelerated blood backflow and of manually triggered self-propelled advancement of the catheter, catheters insertion into blood vessels is significantly improved.

REFERENCES:
patent: 5186712 (1993-02-01), Kelso et al.

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