Medical needle having a closed tip

• US 20060212004A1
• Filed: 03/15/2005
• Published: 09/21/2006
• Est. Priority Date: 03/15/2005
• Status: Active Grant

• Current Assignee: Plaridel Cerna Atil
• Original Assignee: Plaridel Cerna Atil
• Inventors: Atil, Plaridel Cerna
• Granted Patent: US 7,666,172 B2
• Time in Patent Office: Days
• US Class Current: 604/272
• CPC Class Codes: A61M 2005/341 angularly adjustable or angled away from the axis of the injector
• 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

Abstract

A needle is provided, having a closed tip configured to minimize tissue damage from penetration of the needle. The needle includes a tubular side wall defining an internal bore. The needle further includes an end wall angled relative to the needle'"'"'s longitudinal axis and disposed at the distal end of the needle. The needle defines a distal opening spaced from the closed tip, providing access to the internal bore to facilitate fluid transfer. Preferably, the needle is configured to create a crescent-shaped penetration mark. The number and positioning of openings can be varied across embodiments of the invention, while maintaining a closed tip. For example, in certain embodiments, the needle comprises two distal openings defined by the side wall. A distal opening can also be provided by the end wall singly or in combination with additional distal openings.

Claims

1. A needle, comprising

a tubular side wall defining an internal bore, the tubular side wall further defining a longitudinal axis;

a concave end wall disposed at a distal end of the side wall, the end wall angled relative to the longitudinal axis; and

a closed tip defined by a region that includes a distal most interface of the end wall and the tubular side wall;

wherein a distal opening is defined spaced from the closed tip end provides access to the internal bore.

2. A needle as defined in claim 1, wherein the closed tip is offset from the longitudinal axis.

3. A needle as defined in claim 1, wherein the closed tip has a rounded top profile and an acutely angled side profile.

4. A needle as defined in claim 1, wherein an interface of the side wall and the end wall defines a rim circumscribing the end wall.

5. A needle as defined in claim 1, wherein the end wall is angled between about 10 degrees and 30 degrees relative to the longitudinal axis of the needle body.

6. A needle as defined in claim 1, wherein the needle is configured to create a crescent-shaped penetration mark.

7. A needle as defined in claim 1, wherein a cumulative cross section of the distal opening approximates a cross section of the internal bore.

8. A needle as defined in claim 1, wherein two distal openings are defined by the side wall.

9. A needle as defined in claim 1, wherein the distal opening is defined by the end wall.

10. A needle as defined in claim 9, wherein a second distal opening is defined by the side wall.

11. A needle as defined in claim 1, wherein the end wall has a concavity profile, as viewed cross section taken normal to the longitudinal axis.

12. A needle as defined in claim 11, wherein the end wall has a variable concavity profile, as viewed in sequential cross sections taken normal to the longitudinal axis.

13. A needle, comprising

a tubular side wall defining an internal bore, the tubular side wall further defining a longitudinal axis;

an end wall disposed at the distal end such that an interface of the side wall and the end wall defines a rim circumscribing the end wall, the end wall angled relative to the longitudinal axis; and

a closed tip at the distal end, the closed tip including a distal most portion of the interface of the end wall and the tubular side wall such that the closed tip is offset from the longitudinal axis;

wherein a distal opening is defined spaced from the closed tip and provides access to the internal bore.

14. A needle as defined in claim 13, wherein the closed tip has a rounded top profile and an angled side profile.

15. A needle as defined in claim 13 wherein the needle is configured to create a crescent-shaped penetration mark.

16. A needle as defined in claim 13, wherein two distal openings are defined by the side wall.

17. A needle as defined in claim 13, wherein the distal opening is defined by the end wall.

18. A needle as defined in claim 17, wherein a second distal opening is defined by the side wall.

19. A needle, comprising

a tubular side wall defining an internal bore, the tubular side wall further defining a longitudinal axis;

a concave end wall disposed at a distal end of the side wall, the end wall angled relative to the longitudinal axis, the end wall having a variable concavity profile, as viewed in sequential cross sections taken normal to the longitudinal axis; and

a closed tip defined by a region that includes a distal most interface of the end wall and the tubular side wall such that the closed tip is offset from the longitudinal axis, the closed tip having a rounded top profile and an acutely angled side profile;

wherein a distal opening is defined by the side wall, spaced from the closed tip and in proximity to the end wall, providing access to the internal bore.

20. A needle as defined in claim 19, wherein a second distal opening is defined by the side wall.

21. A needle as defined in claim 19, wherein a second distal opening is defined by the end wall.

22. A needle, comprising

a tubular side wall defining an internal bore, the tubular side wall including a first portion defining a first longitudinal axis and a second portion defining a second longitudinal axis angled relative to the first longitudinal axis;

an end wall disposed at a distal end of the first portion such that an interface of the side wall and the end wall defines a rim circumscribing the end wall, the end wall angled relative to the first longitudinal axis; and

a closed tip at the distal end, the closed tip including a distal most portion of the interface of the end wall and the tubular side wall such that the closed tip is offset from the longitudinal axis;

wherein a distal opening is defined spaced from the closed tip and provides access to the internal bore.

23. A needle as defined in claim 22, wherein the closed tip has a rounded top profile and an acutely angled side profile.

24. A needle as defined in claim 22, wherein the closed tip terminates in a point.

25. A needle as defined in claim 22, wherein the end wall is generally flat.

26. A needle as defined in claim 22, wherein the end wall includes a concaved portion.