Intravenous catheter insertion device with retractable needle

• US 20060173413A1
• Filed: 12/21/2004
• Published: 08/03/2006
• Est. Priority Date: 12/21/2004
• Status: Abandoned Application

• Current Assignee: Taiject Medical Device Company Limited
• Original Assignee: Taiject Medical Device Company Limited
• Inventors: Fan, Tzu-Sheng
• Application Number:
  US11/016,826
• Publication Number:
  US 20060173413A1
• Time in Patent Office: Days
• US Class Current: 604/157
• CPC Class Codes: A61M 25/0631 having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
• CPC Class Codes: A61M 5/3232 Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means

Abstract

An intravenous catheter insertion device is disclosed to include a barrel, which has a body and a stop wall, a deformable portion extending from the body, a retainer connected with the deformable portion, and a press portion for pressing by the user to deform the deformable portion. A needle set, which has a cylindrical needle holder, a needle fastened to the needle holder at the front side, a springy stop portion extending from the needle holder, and a retainer connected with the needle holder near the front end of the needle holder. And a spring member, which is mounted around the needle set inside the barrel, and has a first end stopped against the stop wall of the barrel and a rear end stopped against the springy stop portion of the needle set.

Claims

1. An intravenous catheter insertion device comprising:

a barrel, said barrel having a body, a chamber defined within said body, a stop wall at a front end of said body in front of said chamber, a deformable portion connected with said body, a retainer connected with said deformable portion, and a press portion for pressing by the user to deform said deformable portion;

a needle set axially movable in and out of said barrel, said needle set having a cylindrical needle holder, a receiving hole axially extending through said cylindrical needle holder, a needle fastened to said needle holder and axially forwardly extending out of a front end of said needle holder, a springy stop portion extending from said needle holder, and a retainer connected with said needle holder near the front end of said needle holder; and

a spring member mounted around said needle set inside said chamber of said barrel, said spring member having a first end stopped against said stop wall of said barrel and a second end stopped against said springy stop portion of said needle set.

2. The intravenous catheter insertion device as claimed in claim 1, wherein said needle set further has an end flange extending around a rear end of said needle holder.

3. The intravenous catheter insertion device as claimed in claim 1, wherein said needle set has a plurality of ribs axially spaced around the periphery of said needle holder.

4. The intravenous catheter insertion device as claimed in claim 1, wherein said retainer of said needle set has a conical shape.

5. The intravenous catheter insertion device as claimed in claim 1, wherein said spring member is a compressible spiral spring.

6. The intravenous catheter insertion device as claimed in claim 1, wherein said barrel has a mounting hole in a rear end of said body thereof in communication with said chamber.

7. The intravenous catheter insertion device as claimed in claim 6, further comprising a seal adapted to seal said chamber of said barrel, said seal having a body insertable into said mounting hole of said barrel.

8. The intravenous catheter insertion device as claimed in claim 7, wherein said barrel has a retaining portion for securing said seal.

9. The intravenous catheter insertion device as claimed in claim 8, wherein said seal has an annular stop flange extending around the periphery of said body thereof for engaging said retaining portion of said barrel.

10. The intravenous catheter insertion device as claimed in claim 1, wherein said barrel has an opening around said deformation portion and said press portion for enabling the user to visually check flowing of a fluid in said needle set.