Ergonomic vascular access needle

Patent 5242414 Issued on September 7, 1993. Estimated Expiration Date:

August 10, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2658511

3727613

3811441

Method for guide-wire placement and novel syringe therefor
Patent #: 4274408
Issued on: 06/23/1981
Inventor: Nimrod

Hypodermic cartridge
Patent #: 4534763
Issued on: 08/13/1985
Inventor: Gettig , et al.

Assembly of needle and protector Patent #: 4832696
Issued on: 05/23/1989
Inventor: Luther , et al.

Inventors

Application

No. 926277 filed on 08/10/1992

US Classes:

604/168.01, Having telltale for showing entry of blood into conduit604/272, Body piercing condit (e.g., needle, etc.)604/900TELLTALE SHOWING ENTRY OF BLOOD INTO BODY INSERTED CONDUIT

Examiners

Primary: Weiss, John G.

Attorney, Agent or Firm

Rosenberg; Morton J., Klein; David I.

Foreign Patent References

681640 CA 03/13/1964

International Class

A61M 005/178

Abstract

An ergonomic vascular access needle (10) is provided which has a transparent body (20) having an extended and small diameter capillary lumen (22) through which blood may be observed. The extended capillary lumen (22) is in fluid communication on opposing ends with a variable volume chamber (25) and a needle lumen (32). A movable plunger (40) within the transparent body (20) is displaceable to create the variable volume chamber (25). The distal end of the needle (30) is then pushed through the patient's skin and the plunger (40) is displaced from a forward position to create a suction within the capillary lumen (22), the needle lumen (32) and the variable volume chamber (25). The needle (30) is then advanced until the needle distal opening (33) is within the venous lumen and blood is observable in the capillary lumen (22). A guide wire (50) is then advanced through a lumen (42) of the plunger (40) which causes a plug (47) to be pushed into the variable volume chamber (25) and a guide wire (50) is then advanced into the venous lumen. In this manner, the guide wire (50) may be inserted into the venous lumen without external squirting of the blood.