Indwelling catheter

• US 7,914,494 B2
• Filed: 09/27/2007
• Issued: 03/29/2011
• Est. Priority Date: 02/12/2003
• Status: Expired due to Fees

• Current Assignee: Nipro Corporation
• Original Assignee: Nipro Corporation
• Inventors: Hiejima, Katsuhiro
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): LANDRY II, GERALD ERNEST
• Application Number:
  US11/905,047
• Publication Number:
  US 20080027389A1
• Time in Patent Office: 1,279 Days
• Field of Search: 604/167.04, 604/533
• US Class Current: 604/167.04
• CPC Class Codes: A61M 2039/0633 the seal being a passive seal made of a resilient material with or without an opening
• CPC Class Codes: A61M 2039/0646 Duckbill-valve
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence
• CPC Class Codes: A61M 39/26 Valves closing automatically on disconnecting the line and opening on reconnection thereof check valves A61M39/24

Abstract

An indwelling catheter comprises a tube, a female connector and an elastically deformable hemostasis valve which can be pressed by a male connector. An opening taper portion tapered forwardly is formed in a longitudinal intermediate portion of an inner circumferential surface of the female connector. The elastically deformable hemostasis valve is provided longitudinally slidably in the opening taper portion of the female connector and an inside portion extending rearwardly from the opening taper portion. The hemostasis valve includes; a body having a hollow form opened at its front and rear ends or a tubular portion fitted over the connecting portion from a rearward direction; and an openable/closable portion being opened by elastic deformation of the body or the tubular portion.

Claims

1. An indwelling catheter comprising:

an outer needle arranged in a longitudinal direction;

a female connector having a hollow form opened at its front and rear ends and being provided on a rear portion of the outer needle in a state of communicating with the rear portion;

an elastically deformable hemostasis valve disposed in the female connector; and

a tubular connecting means for connecting the outer needle with the hemostasis valve and being integrated with the outer needle or the female connector, the tubular connecting means being arranged in a longitudinal direction, communicating with the outer needle, being located in the female connector, and being opened at its rear end;

wherein the hemostasis valve includes;

a hemostasis valve tubular portion fitted over the tubular connecting means from a rearward direction and reducible in size by forward elastic deformation; and

a hemostasis valve openable/closable portion integrated with a rear end of the hemostasis valve tubular portion to close a rear end opening of the tubular connecting means, and provided with a slit formed to extend in a radial direction, the slit being opened by being elastically deformed in a radially outward direction owing to the reduction in size of the hemostasis valve tubular portion.

2. The indwelling catheter according to claim 1, wherein a connecting taper portion which is provide to extend successively rearwardly from the opening taper portion and to which a male connector is releasably connected is formed on an inner circumferential surface of the female connector.

3. The indwelling catheter according to claim 2, wherein the hemostasis valve is pressable forwardly by the male connector.

4. The indwelling catheter according to claim 2, wherein the male connector is separably connected to a rear portion of the female connector.

5. The indwelling catheter according to claim 2, wherein the hemostasis valve tubular portion is elastically deformed forwardly and reduced in size during application of pressure by the male connector.

6. The indwelling catheter according to claim 1, wherein an inner needle is removably inserted through the outer needle.

7. The indwelling catheter according to claim 6, wherein the inner needle is removably inserted through the outer needle and the female connector with its front portion projecting forwardly from the outer needle.

8. The indwelling catheter according to claim 6, wherein the inner needle is inserted through the slit.

9. The indwelling catheter according to claim 1, wherein the hemostasis valve is made of a rubber elastic material.

10. The indwelling catheter according to claim 1 further comprising a connecting member.

11. The indwelling catheter according to claim 10 wherein the connecting member comprises an inner needle, a needle hub and a male connector.

12. The indwelling catheter according to claim 11 wherein the connecting member having the male connector is a syringe.