ILLUMINATED INFUSION CANNULA

• US 20070179430A1
• Filed: 12/18/2006
• Published: 08/02/2007
• Est. Priority Date: 12/16/2005
• Status: Active Grant

• Current Assignee: Alcon Incorporated
• Original Assignee: Alcon Incorporated
• Inventors: Hickingbotham, Dyson, Smith, Ronald, McCollam, Christopher, Auld, Jack, Lin, Dean
• Granted Patent: US 7,783,346 B2
• Time in Patent Office: Days
• US Class Current: 604/20
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 2017/3419 Sealing means between cannula and body
• CPC Class Codes: A61B 2090/306 using optical fibres
• CPC Class Codes: A61F 9/00736 Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments A61F9/008 takes precedence
• CPC Class Codes: A61M 2205/587 Lighting arrangements
• CPC Class Codes: A61M 2210/0612 Eyes
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

A transparent illuminated infusion cannula is provided for illuminating an area during eye surgery. An optical fiber may be spaced a certain distance away from the cannula such that fluid flow around the distal end of the fiber and into the transparent cannula may occur with a much higher flow rate than what had previously been possible. The fiber cannula airspace may be optimized so that the cross-sectional area of the fluid conduit remains substantially constant in order to achieve a best compromise between high light transmittance and high fluid flow rate.

Claims

1. An illuminated infusion cannula, comprising:

an endo-illuminator operable to provide light;

a hose operable to transport a fluid;

a hub mechanically coupled to the endo-illuminator and the hose; and

a transparent cannula downstream from the hub wherein;

the cannula is positioned coaxially with the endo-illuminator; and

a space between a distal end of the endo-illuminator and proximal end of the transparent cannula, wherein the space allows fluid to flow around the distal end of the endo-illuminator and into the transparent cannula.

2. The illuminated infusion cannula of claim 1, wherein a flow cross-sectional area is substantially constant within the hose, cannula, and interface between the hose, cannula and endo-illuminator.

3. The illuminated infusion cannula of claim 1, wherein the endo-illuminator comprises an optical fiber.

4. The illuminated infusion cannula of claim 3, wherein a distal end of the optical fiber is shaped and wherein the optical fiber/transparent cannula emit light substantially uniformly.

5. The illuminated infusion cannula of claim 1, wherein the distal end of the endo-illuminator is tapered and the proximal end of the transparent cannula is flared.

6. The illuminated infusion cannula of claim 1, wherein at least a portion of the cannula reflects light emitted from the endo-illuminator.

7. The illuminated infusion cannula of claim 1, wherein the cannula disperses light emitted from the endo-illuminator in a desired angular distribution.

8. The illuminated infusion cannula of claim 7, wherein a diffusive surface, a diffractive surface, and/or a micro lens array is operable to disperse light emitted from the endo-illuminator in a desired angular distribution.

9. The illuminated infusion cannula of claim 7, wherein the cannula is curved such that no light emitted from the endo-illuminator is directly transmitted from the cannula.

17. The illuminated infusion cannula of claim 6, wherein a diffusive surface, a diffractive surface, and/or a micro lens array is operable to disperse light emitted from the endo-illuminator in a desired angular distribution.

10. A transparent illuminated infusion cannula, comprising:

an endo-illuminator operable to provide light to illuminate an area within an eye;

a hose operable to transport a fluid;

a protective sheath operable to combine the endo-illuminator and hose within a single cable;

an incision cannula operable to incise the sclera of the eye; and

a transparent cannula within the incision cannula wherein;

the transparent cannula is positioned coaxially with the endo-illuminator; and

a space between a distal end of the endo-illuminator and proximal end of the transparent cannula allows fluid to flow around the distal end of the endo-illuminator, into the transparent cannula, and into a sclera aperture.

11. The illuminated infusion cannula of claim 10, wherein a flow cross-sectional area is substantially constant within the hose, cannula, and interface between the hose, cannula and endo-illuminator.

12. The illuminated infusion cannula of claim 10, wherein the endo-illuminator comprises an optical fiber.

13. The illuminated infusion cannula of claim 12, wherein a distal end of the optical fiber is shaped and wherein the optical fiber/transparent cannula emit light substantially uniformly.

14. The illuminated infusion cannula of claim 10, wherein the distal end of the endo-illuminator is tapered and the proximal end of the transparent cannula is flared.

15. The illuminated infusion cannula of claim 10, wherein at least a portion of the cannula reflects light emitted from the endo-illuminator.

16. The illuminated infusion cannula of claim 10, wherein the cannula disperses light emitted from the endo-illuminator in a desired angular distribution.

18. The illuminated infusion cannula of claim 16, wherein the cannula is curved such that no light emitted from the endo-illuminator is directly transmitted from the cannula.

19. A transparent illuminated infusion cannula, comprising:

an optical fiber operable to provide light to illuminate an area within an eye;

a hose operable to transport a fluid;

a protective sheath operable to combine the optical fiber and hose within a single cable;

an incision cannula operable to incise the sclera of the eye; and

a transparent cannula within the incision cannula wherein;

the transparent cannula is positioned coaxially with the optical fiber; and

space between a distal end of the optical fiber and proximal end of the transparent cannula allows fluid to flow around the distal end of the optical fiber, into the transparent cannula, and into a sclera aperture, and wherein a flow cross-sectional area is substantially constant within the hose, cannula, and interface between the hose, cannula and optical fiber.

20. The illuminated infusion cannula of claim 19, wherein a distal end of the optical fiber is shaped and wherein the optical fiber/transparent cannula emit light substantially uniformly.

21. The illuminated infusion cannula of claim 19, wherein the distal end of the optical fiber is tapered and the proximal end of the transparent cannula is flared.

22. The illuminated infusion cannula of claim 19, wherein the transparent cannula comprises an annular bump operable at to anchor the transparent cannula to the eye after insertion.

23. The illuminated infusion cannula of claim 19, wherein the cannula disperses light emitted from the optical fiber in a desired angular distribution.

24. The illuminated infusion cannula of claim 23, wherein a diffusive surface, a diffractive surface, and/or a micro lens array is operable to disperse light emitted from the optical fiber in a desired angular distribution.