Victor C Chang

US Patent:

7189217, Mar 13, 2007

Filed:

Feb 13, 2006

Appl. No.:

11/352830

Inventors:

Joseph Jawshin Chang - Portland OR, US
Eugene Yonchia Chang - Portland OR, US
Victor Yonguor Chang - Houston TX, US

International Classification:

A61M 5/178

US Classification:

60416408, 128919

Abstract:

A skin puncture device for use as an intravenous catheter or blood collecting needle set is provided with a mechanism for protection against needle injury and access to fluid passageway during insertion. The assembly includes a flexible extension tube connected to the proximal end of the needle housing for use in difficult insertion sites. The extension tube provides access for fluid injection so that the passageway and needle can be filled with fluid prior to needle/catheter insertion, allowing diffusion of blood to provide evidence of successful venipuncture and allowing the infusion of small amounts of fluid into the vein to facilitate catheter advancement. The locking mechanism consists of two apertures in the needle housing and two pairs of needle guard locking tabs which selectively engage when the needle guard is pushed forward to its fully extended position upon completion of insertion or blood drawing, encapsulating the length of the needle.