MULTI-PURPOSE ASPIRATION/IRRIGATION/POLISHING TIPS SUITABLE FOR CATARACT SURGERIES AND RELATED METHODS

• US 20130231605A1
• Filed: 03/04/2013
• Published: 09/05/2013
• Est. Priority Date: 03/05/2012
• Status: Abandoned Application

• Current Assignee: Keith A Walter, Jr.
• Original Assignee: Wake Forest University Health Sciences
• Inventors: Walter, Keith Andrew
• Application Number:
  US13/783,775
• Publication Number:
  US 20130231605A1
• Time in Patent Office: Days
• US Class Current: 604/22
• CPC Class Codes: A61F 2009/0087 Lens
• CPC Class Codes: A61F 2009/00887 Cataract
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic
• CPC Class Codes: A61F 9/008 using laser
• CPC Class Codes: A61F 9/00834 Inlays; Onlays; Intraocular lenses [IOL]
• CPC Class Codes: A61M 3/0283 with at least two inner passageways, a first one for irrigating and a second for evacuating suction-irrigation systems A61M1/77; aspiration tips with fluid supply means A61M1/85; for negative pressure wound therapy A61M1/92

Abstract

Devices and methods for cataract surgery include a tip with a textured outer surface that is configured to gently scrape the capsule bag to allow aspiration of cortical tissue.

Claims

1. A method of performing cataract surgery, comprising:

performing a phacoemulsification procedure on an eye of a patient;

then

inserting, in vivo, an elastomeric tip of an aspiration/irrigation tool having an aspiration port and a textured patch on an outer surface thereof into a capsule bag of a patient;

then

moving the tip to cause the textured patch to contact cortical tissue thereby releasing it from a posterior capsule; and

then

aspirating the released cortical tissue using an aspiration port on the tip.

2. The method of claim 1, wherein the tip has a non-textured smooth outer surface proximate the irrigation/aspiration port, the smooth outer surface covering a greater surface area than a surface area of the textured patch.

3. The method of claim 1, wherein the textured patch resides only on a distalmost end of the tip.

4. The method of claim 1, wherein the textured patch covers only a rounded distal end of the tip a distance forward of the aspiration portion.

5. The method of claim 2, wherein the tip has a smooth surface opposite the textured patch, the method comprising rotating the tip so that the textured surface faces the cortical tissue after the inserting step.

6. The method of claim 1, further comprising oscillating and/or reciprocating a translating member proximate the aspiration port to crush, fragment, or otherwise reduce size of lens pieces in the eye of the patient before the moving the tip step to remove loose lens material after the phacoemulsification.

7. The method of claim 1, wherein the performing step comprises transmitting laser pulses to a lens in the eye of the patient to perform the phacoemulsification.

8. The method of claim 1, wherein the translating is carried out to move a leading end of a translating member aft and forward a distance between 0.5 mm and 2 mm to crush, fragment, chop or otherwise reduce the size of the loose lens material proximate the aspiration port.

9. The method of claim 1, further comprising reducing an intake size of the aspiration port using the translating member after the oscillating or reciprocating movement to safely remove cortex lens material.

10. A multi-purpose irrigation/aspiration tip for use in combination with a surgical system for cataracts, comprising:

an external elastomeric end cap having opposing proximal and distal end portions, the distal end portion having an aspiration port and a textured patch on an outer surface, the end cap sized and configured for polishing a capsular bag and/or contacting cortical fibers using the textured surface.

11. The tip of claim 10, wherein the textured patch resides only on a distalmost end of the end cap.

12. The tip of claim 10, wherein the textured patch covers only a rounded distal end of the end cap a distance forward of the aspiration portion, and wherein the end cap is rubber and sterilized for surgical use.

13. The tip of claim 10, wherein the textured surface is spaced apart between about 0.1 mm to about 5 mm from the aspiration port and other than the textured patch, the end cap has a smooth outer surface.

14. The tip of claim 10, wherein the distal end portion of the end cap has a surface area, and wherein the textured patch surface occupies less than half the surface area.

15. The tip of claim 10, wherein the textured patch occupies an elongate area of a sub-portion of the distal end portion of the end cap with the end cap having a non-textured smooth surface for at least a major portion of a surface area of the end cap.

16. The tip of claim 10, further comprising an aspiration port and a translating member with a leading edge, the translating member in communication with a user control, wherein the translating member leading edge is configured to selectively oscillate or reciprocate a short distance over an external surface of the tip proximate the aspiration port.

17. The tip of claim 10, wherein the aspiration port has a keyhole shape with a small portion merging into a larger portion, and wherein the translating member has a leading end with a shape corresponding to a shape of the larger portion.

18. An ophthalmic irrigation/aspiration device, comprising:

an aspiration cannula, the cannula having a hub configured to attach to a handpiece and an open end opposite the hub; and

a removable, external elastomeric tip adapted to enter a capsular bag of an eye of a patient, the tip sealing the open end of the aspiration cannula and characterized in that the tip comprises a distal end portion with an outer surface having a textured patch and an aspiration port.

19. The device of claim 18, wherein the textured patch resides only on a distalmost end of the tip.

20. The device of claim 18, wherein the textured patch covers only a rounded distal end of the tip a distance forward of the aspiration portion.

21. The device of claim 18, wherein the textured surface is spaced apart between about 0.1 mm to about 5 mm from the aspiration port and other than the textured patch, the tip has a smooth outer surface.

22. The device of claim 18, wherein the distal end portion of the tip has a surface area, and wherein the textured patch surface occupies less than half the surface area.

23. The device of claim 18, wherein the textured patch occupies an area of a sub-portion of the distal end portion of the tip with the tip having a non-textured smooth surface for at least a major portion of a surface area of the tip.

24. The device of claim 18, wherein the tip comprises an end cap with a flange that is coupled to the cannula through a friction-fit between a portion of the end cap and the cannula, wherein, wherein the aspiration port is located at a distal tip of the end cap and the textured patch resides forward of the aspiration port on the tip.

25. The device of claim 18, wherein the tip comprises a sleeve that is external to the hub and hand piece, the sleeve further comprising a fluid irrigation channel and at least one associated port.

26. The device of claim 18, wherein the textured surface is spaced apart between about 0.1 mm to about 1 mm from a distal end of the tip.

27. The device of claim 18, wherein the textured patch occupies less than half a surface area of the distal end of the tip.

28. The device of claim 18, wherein the textured patch occupies an elongate narrow strip area of a sub portion of the distal end portion of the tip.

29. The device of claim 18, wherein the end cap is rubber.

30. The device of claim 18, further comprising a longitudinally translating member with a leading end configured to oscillate and/or reciprocate over an external surface of the tip proximate the aspiration port to reduce a size of loose lens material in an eye of a patient.

31. The device of claim 18, wherein the aspiration port has a keyhole shape with a small portion merging into a larger portion, and wherein the translating member has a leading end with a shape corresponding to a shape of the larger portion.

32. The device of claim 19, wherein the longitudinally translating member slidably resides in a groove extending in an outerwall of the aspiration cannula, and wherein the device further comprises a user actuation control in communication with a shaft of the translating member to cause the translating member to oscillate and/or reciprocate.

33. The device of claim 32, wherein the translating member has a wedge shaped leading end.

34. The device of claim 31, wherein the leading end of the translating member has a substantially circular shape that is sized and configured to overlie and occlude a portion of the aspiration port so that the smaller segment defines an active part of the aspiration port.

35. An ophthalmic irrigation/aspiration device, comprising:

an aspiration cannula, the cannula having a hub configured to attach to a handpiece and an open end opposite the hub;

a removable, external elastomeric tip adapted to enter a capsular bag of an eye of a patient, the tip sealing the open end of the aspiration cannula, wherein the tip comprises a distal end portion with an aspiration port; and

a longitudinally translating member held over the cannula configured to slidably travel over the cannula, the longitudinally extending member having a leading end configured to oscillate and/or reciprocate over an external surface of the tip proximate the aspiration port to reduce a size of loose lens material in an eye of a patient.

36. The device of claim 35, wherein the aspiration port has a keyhole shape with a small portion merging into a larger portion, and wherein the translating member has a leading end with a shape corresponding to a shape of the larger portion.

37. The device of claim 35, wherein the longitudinally translating member slidably resides in a groove extending in an outerwall of the aspiration cannula, and wherein the device further comprises a user actuation control in communication with a shaft of the translating member to cause the translating member to oscillate and/or reciprocate.

38. The device of claim 35, wherein the translating member has a wedge shaped leading end.

39. The device of claim 35, wherein the leading end of the translating member has a substantially circular shape that is sized and configured to overlie and occlude a portion of the aspiration port so that the smaller segment defines an active part of the aspiration port

40. A method of performing cataract surgery, comprising:

performing a phacoemulsification procedure on an eye of a patient;

inserting, in vivo, an elastomeric tip of an aspiration/irrigation tool having an aspiration port into a capsule bag of a patient;

moving a leading edge of a translating member back and forth a short distance over an external surface of the tip proximate the aspiration port to reduce size of lens fragments;

then

aspirating the lens fragments through the aspiration port on the tip.

41. The method of claim 40, wherein the aspiration port has a first segment with a smaller size than a second segment, and wherein the leading edge of the translating member resides over the second segment during the aspiration.