Medical tools with aspiration tips suitable for cataract surgeries and related methods

• US 10,213,533 B2
• Filed: 09/11/2014
• Issued: 02/26/2019
• Est. Priority Date: 03/05/2012
• Status: Active Grant

• Current Assignee: Keith A Walter, Jr.
• Original Assignee: Keith A Walter, Jr.
• Inventors: Walter, Keith Andrew
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): Engel, Matthew A
• Application Number:
  US14/483,626
• Publication Number:
  US 20150005753A1
• Time in Patent Office: 1,629 Days
• 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 9/00825 for photodisruption
• CPC Class Codes: A61F 9/00834 Inlays; Onlays; Intraocular lenses [IOL]
• CPC Class Codes: A61M 1/774 Handpieces specially adapted for providing suction as well as irrigation, either simultaneously or independently
• 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 reciprocating door to chop, fragment or reduce size of large nuclear lens fragments and/or cortex fragments in a capsule bag to facilitate aspiration.

Claims

1. An aspiration tool for use in combination with a surgical system for cataracts after a phacoemulsification and/or laser disintegration procedure, comprising:

a tip having an open leading end that defines an aspiration port, the open leading end located at a distal most end of the tip, the tip sized and configured for removing cortical and/or nuclear lens fragments, tissue and/or fibers; and

a translatable door in communication with the aspiration port configured to extend and retract about the aspiration port, wherein, in an extended position, the door travels forward to occlude the aspiration port,

wherein the door has a door aspiration port extending therethrough, the door aspiration port having a size that is smaller than the aspiration port defined by the open leading end,

wherein the door is flat across the aspiration port defined by the open leading end to completely close the aspiration port defined by the open leading end, and wherein the door aspiration port resides over the aspiration port defined by the open leading end when the door is in the extended position.

2. The aspiration tool of claim 1, wherein the open leading end, when viewed from the side, has a tapered or acute angled profile.

3. The aspiration tool of claim 1, wherein the open leading end of the tip has an external planar bottom surface.

4. The aspiration tool of claim 1, wherein the aspiration port defined by the open leading end has a wall with a perimeter that has spaced apart sides with guides, channels or rails that engage outer side edges of the door to allow the door to slidably translate up and down.

5. The aspiration tool of claim 1, wherein the door has a planar bottom end that is sized and configured to close against a surface of the open leading end of the tip.

6. The aspiration tool of claim 1, wherein at least a portion of the open leading end of the tip comprises a textured exterior surface.

7. The aspiration tool of claim 6, wherein the textured exterior surface extends about at least a portion of a perimeter of the door and/or an external wall of the open leading end of the tip adjacent the perimeter of the door.

8. The aspiration tool of claim 1, the tool further comprising a user control in communication with the door, wherein the door is configured to oscillate or reciprocate over the aspiration port defined by the open leading end, and wherein the user control comprises at least one of an electronic or manual control.

9. The aspiration tool of claim 1, wherein the door is flexible and extends to be flat across the aspiration port defined by the open leading end when partially and/or fully closed.

10. The aspiration tool of claim 1, wherein the door has a pair of laterally opposing outer side edges that each slidably engage a respective side door frame in the tip during longitudinal reciprocal movement.

11. The aspiration tool of claim 1, wherein the open leading end of the tip comprises a front irrigation port that resides adjacent and to a side or under or over the aspiration port defined by the open leading end to thereby allow irrigation fluid to flow forward out of the front irrigation port during aspiration.

12. The aspiration tool of claim 1, wherein the tip comprises an elongate primary body defining an interior aspiration channel, the body comprising a pair of spaced apart longitudinally extending guides, channels or rails that extend downward towards the distal most end of the tip to define first and second sides of a door frame for slidably engaging respective outer spaced apart sides of the door.

13. The aspiration tool of claim 12, wherein the door has a longitudinally extending shaft or extension that cooperates with the longitudinally extending guides, channels or rails and a user control to translate the door between the extended position and a retracted position.

14. An aspiration tool for use in combination with a surgical system for cataracts after a phacoemulsification and/or laser disintegration procedure, comprising:

a tip having an open leading end that defines an aspiration port, the tip sized and configured for removing cortical and/or nuclear lens fragments, tissue and/or fibers; and

a translatable door in communication with the aspiration port configured to extend and retract about the aspiration port, wherein, in an extended position, the door travels forward to at least partially occlude the aspiration port,

wherein the door has a door aspiration port extending therethrough, the door aspiration port having a size that is smaller than the aspiration port defined by the open leading end,

wherein the aspiration port defined by the open leading end has a width that is between about 1 mm to about 1.5 mm across and a height that is between about 0.7 mm to about 1 mm.

15. The aspiration tool of claim 14, wherein the door is flat across the aspiration port defined by the open leading end to close the aspiration port defined by the open leading end, and wherein the door aspiration port resides over the aspiration port defined by the open leading end when the door is in the extended position.