Streamlined ultrasonic device and method of use

• US 8,876,745 B2
• Filed: 03/23/2009
• Issued: 11/04/2014
• Est. Priority Date: 03/24/2008
• Status: Expired due to Fees

• Current Assignee: Alcon Incorporated
• Original Assignee: Alcon Research Limited (Nestle SA)
• Inventors: Escaf, Luis Jose
• Primary Examiner(s): Bosworth, Kami A
• Assistant Examiner(s): HAYMAN, IMANI N
• Application Number:
  US12/409,198
• Publication Number:
  US 20090247936A1
• Time in Patent Office: 2,052 Days
• Field of Search: 604 20- 23, 606/169
• US Class Current: 604/22
• CPC Class Codes: A61F 9/00745 using mechanical vibrations, e.g. ultrasonic

Abstract

A phacoemulsification device has a cutting tip for insertion into an eye and contact with a cataract. The device includes a shaft having a phacoemulsification movement generator connector end, an applicator tip supporting end, and a shaft section extending between the respective ends of the shaft. The shaft section has a convoluted exposed surface comprising longitudinally extending projections and longitudinally extending valleys arranged in sequence about the circumference of the shaft section. The projections are free of any edges as in, for example, an embodiment that includes projections and valleys that have smooth sloped curving walls in cross section and include a plurality of mirror image S-shaped regions extending from a maximum radial extension of a first projection, down to a maximum depth of a first valley and up to a maximum radial extension of a second projection, with the valley positioned between the first and second projections.

Claims

1. A phacoemulsification device, comprising:

a shaft having a proximal end and a distal end;

an applicator tip provided at the distal end;

said shaft including an aspiration passageway extending within said shaft and said applicator tip having an aspiration port that is in flow communication with the aspiration passageway, and said shaft includes a shaft section having an exposed convoluted surface that extends longitudinally along said shaft section and, in cross-section, has a sinusoidal pattern;

wherein,

the exposed convoluted surface comprises a first set of projections and a second set of projections, with each projection presenting a curved surface at a radial outermost end; and

the curved surfaces of the projections of the first set of projections are shorter than the curved surfaces of the projections of the second set of projections.

2. The device of claim 1 wherein said convoluted surface includes a plurality of longitudinally elongated valleys each with a concave base surface section, each valley positioned intermediate of two longitudinally extending projections, with each projection having a convex outermost surface section.

3. The device of claim 2 wherein the curvature of the convex outermost surface section of at least some of the projections is equal to the curvature of the concave base surface section of at least some of the valleys.

4. The device of claim 2 wherein two times a radius value for the concave base surface curvature is equal to the maximum depth of each valley down from a circumferential line which contacts the outermost points of said first and second sets of projections.

5. The device of claim 2 wherein said longitudinally elongated valleys and projections are linearly arranged as to extend parallel to a central axis of extension of said shaft section, and said aspiration passageway extends along that central axis of extension, and the aspiration passageway being in fluid communication with two independent aspiration ports which extend obliquely out from the aspiration passageway.

6. The device of claim 2 wherein said shaft section includes a base body having an interior surface defining the aspiration passageway and an exterior surface which defines the radially interior most points of the concave base surface sections of said valleys, and said first and second sets of projections extending radially off said base body to about an equal amount or greater extent than the radial thickness of said base body.

7. The device of claim 1 wherein said exposed convoluted surface is configured as to be free of any sharp edges and wherein said applicator tip comprises a blade section and a tapered transition section having a maximum circumference corresponding to a circumferential line contacting the radial outermost end of said first and second sets of projections, and said transition section converging in a distal direction to a proximal end of said blade section, and wherein said first and second sets of projections extend to a proximal end of said transition section.

8. The device of claim 1 wherein a circumferential width of an intermediate in height region of at least some of said projections is about equal to the circumferential width of an adjacent valley.

9. The device of claim 1 wherein the convoluted surface comprises valleys positioned intermediate of adjacent projections, with each projection and each valley of the exposed convoluted surface of the shaft section linearly arranged as to extend parallel to a central axis of extension of said shaft section, along the entire length of said shaft section.

10. The device of claim 9 wherein all of the valleys have a common cross-sectional configuration about the entire circumference of said shaft section.

11. The device of claim 1 wherein said curved surfaces of said first and second sets of projections define a circumferential surface at the radial outermost end of said first and second projections, and projections in said second set of projections have a circumferential surface that is circumferentially longer than the circumferential surface presented by projections in said first set of projections, and all projections in said first and second sets have curved side wall edge regions that extend down and away from the radial outermost end of the respective projections.

12. The device of claim 11 wherein said first set of projections includes projections that are positioned, when the device is in use, in both an upper and lower region of the exposed convoluted surface of said shaft section, and wherein said projections of said second set are positioned, when the device is in use, to left and right regions of the exposed convoluted surface of said shaft section.

13. The device of claim 11 wherein each projection of said second set of projections have a configuration represented by taking a pair of projections in said first set of projections and an associated valley therebetween and filling in that associated valley up to a circumferential line that extends between radial outermost points of the pair of projections in said first set of projections.

14. The device of claim 1 wherein a circumferential line extending into contact with a radial outermost point of said first and second sets of projections is about 1 mm or less in diameter.

15. The device of claim 14 wherein

the convoluted surface comprises valleys positioned intermediate of adjacent projections,

the aspiration passageway is defined by an internal surface of said shaft section which has a radius of about 45% relative to the radius of the circumferential line, and

said shaft section is comprised of a base body off from which said first and second sets of projections radially extend outward, with said valleys having a maximum depth that represents about 55% of the radial distance from said internal surface to said circumferential line.

16. A method of removing a cataract, comprising

inserting the device of claim 1 into an incision formed in an eye of less than 1.5 mm such that projections of the convoluted exposed surface come into direct contact with wall segments of the eye defining the incision, and subjecting said device to vibration.

17. The method of claim 16 wherein the device insertion incision is 1.2 mm or less and there is further provided a cooling fluid irrigation source incision that is separate and apart from the device insertion incision, and wherein said device comprises a connection hub at the proximal end suited for attachment with a phacoemulsification movement generator.

18. The phacoemulsification device of claim 1, wherein the applicator tip is dimensioned for insertion into an eye and into contact with a cataract and said shaft has a phacoemulsification movement generator connector end at a proximal location and an applicator tip supporting end at a distal end, and wherein said shaft section extends in a region positioned between said proximal and distal ends of said shaft, and said exposed convoluted surface includes longitudinally extending projections and longitudinally extending valleys arranged in sequence about the circumference of the shaft section, and wherein the projections and valleys have smooth sloped curving walls in cross section and which smooth sloped curving walls include a plurality of mirror image S-shaped regions extending from a maximum radial extension region of a first projection, down to a maximum depth valley region of a first valley and up to a maximum radial projection of a second projection, with said valley region being positioned between respective first and second projections.

19. The device of claim 18 wherein said cross section of said convoluted surface has a diameter that is about 1 mm or less.

20. The device of claim 19 wherein said curved surfaces of said projections in said first and second sets of projections define a circumferential surface at the radial outermost end of said first and second sets of projections, and projections in said second set of projections have a circumferential surface that is circumferentially longer than the circumferential surface presented by projections in said first set of projections, and all projections in said first and second sets have curved side wall edge regions that extend down and away from the radial outermost end of the respective projections.

21. The device of claim 20 wherein said first set of projections includes projections that present a semi-circular radially outermost region and said first set of projections are positioned, when the device is in use, in both an upper and lower region of the exposed convoluted surface of said shaft section, and wherein said second set of projections are positioned, when the device is in use, to left and right regions of the exposed convoluted surface of said shaft section.

22. The phacoemulsification device of claim 1 further, comprising,

a movement generator connector, with said shaft extending between the applicator tip and the movement generator connector, and said exposed convoluted surface includes longitudinally extending projections and longitudinally extending valleys arranged in sequence about the circumference of the shaft section, and wherein the projections have smooth sloped curving walls in cross section as to avoid sharp edge presentment about the circumference of the convoluted exposed surface of the shaft section.

24. The device of claim 22 further comprising a phacoemulsification movement generator connected with said movement generator connector which is provided at the proximal end of said shaft.

25. The device of claim 22 wherein said curved surfaces of said projections of said first and second sets of projections define convex surfaces at the radial outermost end of said projections, with the projections of the first set of projections having a smaller convex curvature radius as compared to the convex curvature radius of the projection of the second set of projections.

26. The device of claim 25 wherein a horizontal plane extending through a central region in height of the projections of said second set of projections also extends through a port hole access opening of the aspiration port provided in said applicator tip.

23. The device of 22 wherein said valleys and said projections of said first and second sets are entirely comprised of curved surface sections.

27. A phacoemulsification device, comprising:

a shaft having a proximal end and a distal end;

an applicator tip provided at the distal end;

said shaft including an aspiration passageway extending within said shaft and said applicator tip having an aspiration port that is in flow communication with the aspiration passageway, and said shaft includes a shaft section having an exposed convoluted surface that extends longitudinally along said shaft section and, in cross-section, has a sinusoidal pattern;

wherein,

the exposed convoluted surface comprises a first set of projections and a second set of projections, with each projection presenting a curved surface at a radial outermost end;

the curved surfaces of the projections of the first set of projections are shorter than the curved surfaces of the projections of the second set of projections; and

said curved surfaces of said first and second sets of projections present a generally semi-circular outermost exposed surface, such that each projection comprises a radial outermost point corresponding to a common circumferential line, wherein projections of said second set of projections have an outermost exposed surface presentation that is circumferentially longer than an outermost exposed surface presentation of projections of said first set of projections, and wherein all projections in said first and second sets have curved side wall edge regions that extend down and away from the curved outermost exposed surface presentations of the respective projections.

28. The device of claim 27 wherein said first set of projections includes projections that are positioned, when the device is in use, in both an upper and lower region of the exposed convoluted surface of said shaft section, and wherein said projections of said second set are positioned, when the device is in use, to left and right regions of the exposed convoluted surface of said shaft section.

29. A phacoemulsification device, comprising:

a shaft having a proximal end and a distal end;

an applicator tip provided at the distal end;

said shaft including an aspiration passageway extending within said shaft and said applicator tip having an aspiration port that is in flow communication with the aspiration passageway, and said shaft includes a shaft section having an exposed convoluted surface that extends longitudinally along said shaft section and, in cross-section, has a sinusoidal pattern; and

said applicator tip includes a cutter tip with an opposing flat faced side walls section, having a pair of inlet ports positioned on opposite sides of said opposing flat faced side walls section such that said inlet ports extend in converging fashion into fluid communication connection with the aspiration passageway, and wherein said inlet ports converge into a common, coinciding outlet port, being oblong in cross section, that feeds directly into the aspiration passageway;

wherein said opposing flat faced side walls section comprises a pair of opposing flat faced side walls at a distal end and a transition section at a proximal end, and said inlet ports are positioned on opposite sides of said transition section.

30. The device of claim 29, wherein said convoluted surface comprises projections and grooves, and said transition section is a tapered transition section having a proximal end with a maximum circumference line corresponding to a circumferential defined by a radial outermost end of said projections, with said projections and grooves being elongated and extending to said proximal end of said transition section, and said tapered transition section converging in a distal direction to correspond with a proximal end of said opposing flat faced side walls section of said cutter tip.