INJECTION NEEDLE HAVING LATERAL DELIVERY PORTS AND METHOD FOR THE MANUFACTURE THEREOF

• US 20080172012A1
• Filed: 10/31/2006
• Published: 07/17/2008
• Est. Priority Date: 10/31/2006
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Sommer, John L., Sigg, Daniel C., Bonner, Matthew D., Hiniduma-Lokuge, Prasanga D., Fernandes, Brian C.A.
• Application Number:
  US11/555,086
• Publication Number:
  US 20080172012A1
• Time in Patent Office: Days
• US Class Current: 604/272
• CPC Class Codes: A61M 25/00 Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: A61M 5/3286 Needle tip design, e.g. for improved penetration
• CPC Class Codes: A61M 5/3291 Shafts with additional lateral openings
• CPC Class Codes: B21G 1/08 of hollow needles or needles with hollow end, e.g. hypodermic needles, larding-needles B21G1/10 takes precedence

Abstract

An injection needle comprises an elongated body having an outer surface and an inner surface defining a longitudinal channel through the tubular body. The elongated body further comprises a distal end and at least one lateral delivery port extending from the inner surface to the outer surface proximate the distal end and fluidly coupled to the longitudinal channel. A distal tip is coupled to the distal end and comprises a radio-opaque material.

Claims

1. An injection needle, comprising:

an elongated body having an outer surface, an inner surface defining a longitudinal channel through the tubular body, a distal end, and at least one lateral delivery port extending from said inner surface to said outer surface proximate said distal end and in fluid communication with said longitudinal channel; and

a distal tip coupled to said distal end and comprising a radio-opaque material.

2. An injection needle according to claim 1 wherein said distal end includes an aperture therethrough in fluid communication to said longitudinal channel, and wherein said distal tip sealingly encloses said aperture.

3. An injection needle according to claim 1 wherein said elongated body is curved.

4. An injection needle according to claim 1 wherein said at least one lateral delivery port comprises a plurality of apertures spaced around a distal, annular portion of said elongated body.

5. An injection needle according to claim 1 wherein said at least one lateral delivery port has a diameter of at least approximately 0.004 inch.

6. An injectate needle according to claim 1 wherein said longitudinal channel has a first diameter and said at least one lateral delivery port has a second diameter substantially less than or equal to 90% of said first diameter.

7. An injectate needle according to claim 6 wherein said second diameter is substantially equal to 80% of said first diameter.

8. An injection needle, comprising:

a substantially tubular body including a proximal end, a distal end, an injectate channel extending from said proximal end to said distal end, and a plurality of lateral delivery ports extend radially through said substantially tubular body and circumferentially spaced around an annular portion thereof; and

a distal tip fixedly coupled to said distal end and comprising a substantially conical body.

9. An injection needle according to claim 8 wherein said substantially conical body comprises a right circular cone.

10. An injection needle according to claim 8 wherein said distal tip further comprises a plug portion extending proximally from said substantially conical body and into said longitudinal channel.

11. An injection needle according to claim 8 wherein at least a portion of said distal tip comprises a biodegradable material.

12. An injection needle according to claim 8 wherein said plurality of lateral delivery ports includes:

a first delivery port; and

a second delivery port, said second delivery port positioned closer to said distal end than is said first delivery port, and the cross-sectional area of said second delivery port being greater than the cross-sectional area of said first delivery port.

13. An injection needle according to claim 12 wherein said first delivery port includes a substantially circular cross-section having a diameter of approximately 0.0004 inch and said second delivery port includes a substantially circular cross-section having a diameter of approximately 0.0005 inch.

14. An injection needle according to claim 8 wherein said plurality of lateral delivery ports each reside at a substantially different circumferential position around said annular portion.

15. An injection needle according to claim 8 wherein said plurality of lateral delivery ports comprises a plurality of through holes orthogonally positioned with respect to the longitudinal axis of said substantially tubular body.

16. A method for producing an injection needle comprising a tubular body having at least one lateral delivery port therethrough, the method comprising:

selecting a tubing;

attaching a distal tip to the distal end of the tubing; and

producing at least one lateral port through the tubing proximate the distal tip.

17. A method according to claim 16 wherein the step of attaching a distal tip comprises:

attaching a body of tip material to the distal end of the tubing; and

machining the body of tip material into a substantially conical tip.

18. A method according to claim 16 wherein the step of attaching a distal tip comprises laser welding a pre-formed distal tip to the distal end of the tubing.

19. A method according to claim 18 wherein the pre-formed distal tip is chosen to comprise a radio-opaque material.

20. A method according to claim 16 wherein the step of producing at least one lateral port comprises electrical discharge machining.