Introducer needle for continuous perineural catheter placement

• US 6,485,475 B1
• Filed: 03/01/2000
• Issued: 11/26/2002
• Est. Priority Date: 03/01/2000
• Status: Expired due to Fees

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Chelly, Jacques E.
• Primary Examiner(s): Lazarus, Ira S.
• Assistant Examiner(s): NGUYEN, CAMTU TRAN
• Application Number:
  US09/516,980
• Time in Patent Office: 1,000 Days
• Field of Search: 604/264, 604/164.13
• US Class Current: 604/264
• CPC Class Codes: A61M 2025/0007 Epidural catheters
• CPC Class Codes: A61M 25/065 Guide needles

Abstract

The present invention is directed toward an improved catheter introducer needle capable of introducing a catheter into a body at a deflection angle in the range of 40-75° from the axis of the needle. This invention provides for a continuous perineural placement of a catheter. The present invention is also directed toward an introducer needle/catheter system comprising the needle of the present invention and a catheter extending through the needle such that it extends out beyond the tip of the needle at an angle of deflection in the range of 30-75° from the axis defined by the catheter within the main channel of the needle. This invention is useful in delivering pharmacological agents, such as local anesthetics, to nerves in various regions of the body including, but not limited to, the arms and shoulders.

Claims

1. An introducer needle capable of introducing a catheter comprising:

a. a tubular body comprising an exterior surface, an interior surface, a first end region, and a second end region;

b. a channel extending the length of said body to define a channel axis;

c. a first opening located in said first end region contiguous with said channel; and

d. a second opening located in said second end region contiguous with said channel and positioned such that a flexible catheter extending through said channel and second opening is deflected by a portion of the tubular body at an angle in the range of 30-75 degrees from the channel axis.

2. The needle needle of claim 1, further comprising electrical insulation placed upon the exterior surface of said body.

3. The needle of claim 1, wherein said insulation covers the exterior surface of said body.

4. The needle of claim 1, wherein said body has a length in the range of 0.5-10.0 inches.

5. The needle of claim 1, wherein said body has a gauge in the range of 14-20.

6. The needle of claim 5, wherein said body has a gauge in the range of 18-19.

7. The needle of claim 1 further comprising a flexible catheter extending through said channel, said first opening and said second opening such that the portion of said catheter that extends beyond said second opening is displaced at an angle in the range of 30-75 degrees with respect to the portion of said catheter in said channel.

8. The needle of claim 7, wherein said body has a length in the range of 0.5-10.0 inches.

9. The needle of claim 7, wherein said body has a gauge in the range of 14-20.

10. The needle of claim 2 further comprising a flexible catheter extending through said channel, said first opening and said second opening such that the portion of said catheter that extends beyond said second opening is displaced at an angle in the range of 30-75 degrees with respect to the portion of said catheter in said channel.

11. The needle of claim 10, wherein said body has a length in the range of 0.5-10.0 inches.

12. The needle of claim 10, wherein said body has a gauge in the range of 14-20.

13. An introducer needle/catheter system comprising:

a. a tubular body comprising an exterior surface, an interior surface, a first end region, and a second end region;

b. a channel extending the length of said body to define a channel axis;

c. a first opening located in said first end region contiguous with said channel;

d. a second opening located in said second end region contiguous with said channel and positioned such that a flexible catheter extending through said channel and second opening is deflected at an angle in the range of 30-75 degrees from the channel axis; and

e. a flexible catheter extending through said channel, said first opening and said second opening such that the portion of said catheter that extends beyond said second opening is displaced at an angle in the range of 30-75 degrees with respect to the portion of said catheter in said channel at the location of the second opening.

14. The system of claim 13 wherein said catheter comprises an extension region extending out of said body beyond said second opening.

15. The system of claim 14 wherein said extension region comprises a tip comprising an opening.

16. The system of claim 14 wherein said extension end region comprises a multiplicity of openings.

17. The system of claim 13, further comprising electrical insulation placed upon the exterior surface of said body.

18. The system of claim 13 wherein said body has a gauge in the range of 14-20 and a length in the range of 0.5-10.0 inches.

19. An introducer needle capable of introducing a catheter comprising:

a. a tubular body comprising an exterior surface, an interior surface, a first end region, and a second end region, said body having a length in the range of 0.5-10.0 inches and a gauge in the range of 14-20;

b. a channel extending the length of said body to define a channel axis;

c. a first opening located in said first end region contiguous with said channel; and

c. a second opening located in said second end region contiguous with said channel and positioned such that a flexible catheter extending through said channel and second opening is deflected by a portion of the tubular body at an angle in the range of 30-75 degrees from the channel axis.

20. The needle needle of claim 19, further comprising electrical insulation placed upon the exterior surface of said body.