Safety cannula needle protector

• US 20080195054A1
• Filed: 02/08/2008
• Published: 08/14/2008
• Est. Priority Date: 02/08/2007
• Status: Abandoned Application

• Current Assignee: Inviro Medical Devices Incorporated
• Original Assignee: Inviro Medical Incorporated
• Inventors: Snarp, Fraser R., Hourigan, James T.
• Application Number:
  US12/068,601
• Publication Number:
  US 20080195054A1
• Time in Patent Office: Days
• US Class Current: 604/192
• CPC Class Codes: A61M 2005/3201 Coaxially assembled needle cannulas placed on top of another, e.g. needles having different diameters
• CPC Class Codes: A61M 2209/045 for filling, e.g. for filling reservoirs
• CPC Class Codes: A61M 5/1782 Devices aiding filling of syringes in situ combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003
• CPC Class Codes: A61M 5/3297 Needles arranged coaxially

Abstract

A safety aspiration cannula for protecting a sharp injection needle including: a hub or base portion attachable to a syringe or injection needle hub that has an injection needle with a sharp hollow tip; a cannula body extending away from the hub or base portion and adapted to enclose the injection needle, the cannula having a tip adapted to receive a fluid and transfer the fluid to the syringe via the hollow tip of the injection needle.

Claims

1. A safety cannula for protecting an injection needle comprising:

a hub or base portion attachable to a syringe that has an injection needle with a sharp hollow tip;

a cannula body extending away from the hub or base portion and adapted to enclose the injection needle, said cannula having a tip adapted to receive a fluid and transfer the fluid to the syringe via the hollow tip of the injection needle.

2. The safety cannula of claim 1 wherein said tip of said cannula has a semi-sharp hollow point.

3. The safety cannula of claim 1 wherein said tip of said cannula has a solid relatively sharp tip with one or more side openings therein.

4. The safety cannula of claim 1 wherein said safety cannula is provided with one or more radially extending tabs.

5. The safety cannula of claim 3 wherein said solid relatively sharp tip is enlarged relative to said cannula body.

6. The safety cannula of claim 1 including a filter located in said cannula body, adapted to enclose the hollow tip of the injection needle.

7. A safety cannula for protecting an injection needle comprising:

a hub or base portion attachable to a syringe that has an injection needle with a hollow tip;

a cannula body extending away from the hub or base portion and adapted to enclose the injection needle, said cannula having a solid tip with one or more side openings therein, adapted to receive a fluid and transfer the fluid to the syringe via the hollow tip of the enclosed injection needle.

8. The safety cannula of claim 7 wherein said safety cannula is provided with one or more radially extending tabs.

9. The safety cannula of claim 7 wherein said solid tip is enlarged relative to said cannula body.

10. A syringe and safety cannula assembly comprising a syringe having a sharp, hollow-tipped injection needle;

a safety cannula attached to said syringe, said safety cannula comprising a hub or base portion, a cannula body extending from said hub or base portion in surrounding relationship to said injection needle, said cannula body terminating at a tip located axially beyond the injection needle.

11. The assembly of claim 10 wherein said tip comprises a hollow-tip that is less sharp than said hollow-tipped injection needle.

12. The assembly of claim 10 wherein said tip comprises an enlarged, solid and semi-sharp tip with one or more side openings.

13. The assembly of claim 10 wherein said safety cannula is provided with a filter enclosing a forward end of the injection needle.

14. The assembly of claim 13 wherein said filter comprises a plug of microporous foam material.

15. The assembly of claim 10 wherein said safety cannula is attached to the syringe by a standard Luer fitting.