Liquefaction handpiece tip

• US 7,967,799 B2
• Filed: 03/16/2005
• Issued: 06/28/2011
• Est. Priority Date: 03/16/2005
• Status: Expired due to Fees

• Current Assignee: Novartis Ag
• Original Assignee: Alcon Incorporated
• Inventors: Boukhny, Mikhail
• Primary Examiner(s): Stigell; Theodore J
• Application Number:
  US11/082,084
• Publication Number:
  US 20060212038A1
• Time in Patent Office: 2,295 Days
• Field of Search: 604/19, 604/22, 604/27, 604/30, 604/35, 604/93.01, 604/158, 604/272, 604/273, 604/275, 607/107, 607/167
• US Class Current: 604/272
• CPC Class Codes: A61B 17/3203 Fluid jet cutting instruments
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic

Abstract

A surgical tip having a spacer or stand-off to keep the distal end of the tip from directly contacting delicate tissue, such as the posterior capsule. In addition, one or more bypass holes may be provided to help vent any excess pressure when the tip is near delicate tissue.

Claims

1. A tip for a liquefaction handpiece, comprising:

an inner tube coaxially mounted within an outer tube so as to form an annular gap between the inner tube and the outer tube, the inner tube having at least one bypass hole in a sidewall of the inner tube;

wherein the inner tube has an irrigation bore and a non-beveled distal tip, comprising a distal tip opening, and a spacer formed on the distal tip and extending past the distal tip opening to provide a spacing between the distal tip opening and tissue such that pulses exiting the distal tip opening travel the spacing before contacting the tissue, the spacer including an enlarged, curved tip;

wherein the inner tube is configured to direct pulses of fluid out of the distal tip opening;

wherein the bypass hole is configured to vent excessive pressure from the irrigation bore to the annular gap when the distal tip opening becomes at least partially obstructed; and

wherein the distal tip opening forms a plane that is perpendicular to a centerline of the inner tube and wherein the spacer extends outward from the plane of the distal tip opening.

2. The tip of claim 1, wherein the spacer is further configured to be used as a scrubber for scrubbing or loosening lens epithelial cells from a posterior capsule.

3. The tip of claim 1, wherein the pulses of fluid at least partially dissipate while traveling through the spacing between the distal tip and the tissue.

4. The tip of claim 1, wherein a portion of the spacer tip configured to contact tissue is rounded.

5. The tip of claim 1, wherein the spacing between the distal tip opening and an end of the spacer opposite the distal tip opening is greater than a diameter of the distal tip opening.

6. A tip for a liquefaction handpiece, comprising:

an inner tube coaxially mounted within an outer tube so as to form an annular gap between the inner tube and the outer tube, the inner tube comprising;

a non-beveled distal tip, comprising a distal tip opening, and a spacer formed on the distal tip and extending past the distal tip opening, the spacer including an enlarged, curved tip; and

at least one bypass hole and an irrigation bore;

wherein the inner tube is configured to direct pulses of fluid out of the distal tip opening and wherein the spacer is configured to provide a spacing between the distal tip and tissue such that pulses exiting the distal tip travel the spacing before contacting the tissue;

wherein the bypass hole is configured to vent excessive pressure from the irrigation bore to the annular gap when the distal tip opening becomes at least partially obstructed; and

wherein the distal tip opening forms a plane that is perpendicular to a centerline of the inner tube and wherein the spacer extends perpendicular to the plane of the distal tip opening.

7. The tip of claim 6, wherein the spacer is further configured to be used as a scrubber for scrubbing or loosening lens epithelial cells from a posterior capsule.

8. The tip of claim 6, wherein the pulses of fluid at least partially dissipate while traveling through the spacing between the distal tip and the tissue.

9. The tip of claim 6, wherein a portion of the spacer tip configured to contact tissue is rounded.

10. The tip of claim 6, wherein the spacing between the distal tip opening and an end of the spacer opposite the distal tip opening is greater than a diameter of the distal tip opening.