Ophthalmic cutting instruments having integrated aspiration pump

Patent metadata

Field	Value
Publication number	US-11730625-B2
Application number	US-202016875426-A
Country	US
Kind code	B2
Filing date	May 15, 2020
Priority date	May 17, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A device for performing an ophthalmic procedure in an eye including a hand-held portion; an elongate member extending from a distal end region of the hand-held portion; and an aspiration pump within the hand-held portion. The elongate member includes a lumen and an opening near a distal end region of the elongate member. The aspiration pump is in fluid communication with the opening of the elongate member. The aspiration pump includes a camshaft extending along a longitudinal axis and having a plurality of lobed cams; tubing extending parallel to the longitudinal axis; and a plurality of cam followers driven by the cams of the camshaft to move in a plane perpendicular to the longitudinal axis to sequentially compress the tubing. Related devices, systems, methods are provided.

First claim

What is claimed is:

1. A device for performing an ophthalmic procedure in an eye, the device comprising:
a hand-held portion;
an elongate member extending from a distal end region of the hand-held portion, the elongate member comprising a lumen and an opening near a distal end region of the elongate member;
an aspiration pump within the hand-held portion in fluid communication with the opening of the elongate member, wherein the aspiration pump comprises:
a camshaft extending along a longitudinal axis and having a plurality of lobed cams;
tubing extending parallel to the longitudinal axis; and
a plurality of cam followers driven by the cams of the camshaft to move in a plane perpendicular to the longitudinal axis to sequentially compress the tubing; and

a drive mechanism configured to operatively couple with the camshaft, wherein the drive mechanism is configured to rotate the camshaft and drive oscillation of the elongate member.

2. The device of claim 1 , wherein the tubing comprises a proximal flow path that splits into a pair of peripheral tubes positioned on either side of the camshaft, the pair of peripheral tubes combine distal to a pumping manifold to form a distal flow path in fluid communication with the lumen of the elongate member.

3. The device of claim 2 , wherein the plurality of cam followers sequentially compressing the pair of peripheral tubes creates a substantially non-pulsatile aspiration.

4. The device of claim 3 , wherein the substantially non-pulsatile aspiration is less than 3 cc/minute.

5. The device of claim 3 , wherein the substantially non-pulsatile aspiration is between 3 cc/minute to 10 cc/minute.

6. The device of claim 3 , wherein the substantially non-pulsatile aspiration is greater than 10 cc/minute up to 25 cc/minute.

7. The device of claim 1 , wherein the elongate member is movable in a reciprocating motion relative to the hand-held portion.

8. The device of claim 1 , wherein the elongate member is configured for lens fragmentation, lens emulsification, or anterior vitrectomy.

9. The device of claim 1 , wherein the elongate member has a maximum cross-sectional diameter of about 1.25 mm.

10. The device of claim 1 , wherein the elongate member has a maximum cross-sectional diameter that is no more than 3 mm.

11. The device of claim 1 , wherein the elongate member is a vitrectomy probe that is between 20 gauge and 27 gauge.

12. The device of claim 1 , wherein the elongate member is configured to slide reciprocally within an outer tube that is fixedly coupled within an interior of the hand-held portion.

13. The device of claim 12 , wherein a distal tip of the elongate member forms a cutting edge.

14. The device of claim 13 , wherein the outer tube comprises an opening through a side wall.

15. The device of claim 14 , wherein the elongate member further comprises a side opening near its distal end region, wherein the elongate member is configured to create two cuts in concert with the outer tube, wherein a first cut of the two cuts is formed as a distal shaft edge of the elongate member advances distally through the outer tube and wherein a second cut of the two cuts is formed as a proximal shaft edge of the elongate member advances proximally through the outer tube.

16. The device of claim 1 , wherein the elongate member comprises a proximal opening positioned within a chamber of a vacuum manifold in fluid communication with the aspiration pump.

17. The device of claim 1 , wherein the elongate member is configured to oscillate at 300 cuts per minute.

18. The device of claim 1 , wherein the elongate member is configured to oscillate at 500-600 cuts per minute.

19. The device of claim 1 , wherein the elongate member is configured to oscillate up to 5000 cuts per minute.

20. The device of claim 1 , wherein the elongate member is configured to oscillate up to 7500 cuts per minute.

21. The device of claim 1 , further comprising a gear box configured to amplify an input from the aspiration pump to achieve an output of the elongate member configured for vitrectomy.

22. The device of claim 21 , wherein the gear box is a planetary gear box.

23. The device of claim 1 , further comprising gearing to ramp up input from the drive mechanism.

24. The device of claim 23 , wherein the camshaft of the aspiration pump rotates at a fixed rate to deliver between about 15 cc/minute and 30 cc/minute of aspiration potential.

25. The device of claim 23 , wherein the input from the drive mechanism is about 140 RPMs and the gearing has a ratio that is at least 3:1, 4:1, 5:1, 6:1, up to 30:1.

26. The device of claim 1 , wherein the camshaft operatively interfaces with a cutter assembly configured to convert rotary motion of the camshaft with reciprocal linear motion of the elongate member.

27. The device of claim 26 , wherein the cutter assembly comprises a ramp cam and a cutter return spring.

28. The device of claim 27 , wherein proximal motion of the elongate member is a function of the ramp cam and distal motion of the elongate member is a function of the cutter return spring.

29. The device of claim 26 , wherein the cutter assembly comprises a translating magnet disc and a rotating magnet disc.

30. The device of claim 29 , wherein the translating magnet disc comprises one or more magnets and wherein the rotating magnet disc comprises one or more magnets.

31. The device of claim 30 , wherein the one or more magnets of the translating magnet disc and the rotating magnet disc create a local magnetic field as the one or more magnets of the rotating magnet disc spin in and out of alignment with the one or more magnets of the translating magnet disc.

32. The device of claim 31 , wherein the translating magnet disc is coupled to a cutter spline and the cutter spline is coupled to the elongate member such that the translating magnet disc, the cutter spline, and the elongate member all translate axially together.

33. The device of claim 32 , wherein the translating magnet disc, cutter spline, and the elongate member are configured to move bidirectionally a distance axially along the longitudinal axis due to rotation of the camshaft.

34. The device of claim 30 , wherein alignment of the one or more magnets of the rotating magnet disc with the one or more magnets of the translating magnet disc cause linear motion by magnetic attraction or magnetic repulsion.

35. The device of claim 30 , wherein the rotating magnet disc comprises a plurality of magnets oriented relative to one another so that poles of the magnets alternate.

36. The device of claim 30 , wherein rotation of the rotating magnet disc relative to the translating magnet disc causes the poles of the plurality of magnets to cause alternating repulsion and attraction with the one or more magnets of the translation magnet disc causing oscillation of the elongate member.

37. The device of claim 30 , further comprising a second rotating magnet disc comprising one or more magnets, wherein the second rotating magnet disc is positioned distal to the translating magnet disc.

38. The device of claim 37 , wherein alignment of the one or more magnets of the first and second rotating magnet discs with the one or m

Assignees

• Zeiss Carl Meditec Inc

Inventors

• Carter Brett
• Chamness Scott
• Clauson Luke W
• Schaller Michael

Classifications

• A61F9/00736 Primary

  Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments (A61F9/008 takes precedence) · CPC title

• A61F9/00754

  for cutting or perforating the anterior lens capsule, e.g. capsulotomes · CPC title

• A61M1/743

  by changing the cross-section of the line, e.g. flow regulating valves (A61M1/7413 takes precedence) · CPC title

• A61M1/774

  Handpieces specially adapted for providing suction as well as irrigation, either simultaneously or independently · CPC title

• A61M2210/0612

  Eyes · CPC title