Devices and methods for ocular surgery

• US 11,278,450 B2
• Filed: 05/03/2018
• Issued: 03/22/2022
• Est. Priority Date: 05/04/2017
• Status: Active Grant

• Current Assignee: Carl Zeiss Meditec Cataract Technology Inc. (Carl-Zeiss-Stiftung)
• Original Assignee: Carl Zeiss Meditec Cataract Technology Inc. (Carl-Zeiss-Stiftung)
• Inventors: Clauson, Luke W., Schaller, Michael P., Chamness, Scott, Reese, Brendan
• Primary Examiner(s): Yabut, Diane D
• Assistant Examiner(s): Lauer, Christina C
• Application Number:
  US15/970,439
• Publication Number:
  US 20180318132A1
• Time in Patent Office: 1,419 Days
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 2017/306 holding by means of suction
• CPC Class Codes: A61B 2017/320024 Morcellators, e.g. having a hollow cutting tube with an annular cutter for morcellating and removing tissue
• CPC Class Codes: A61B 2017/32006 with a cutting strip, band or chain, e.g. like a chainsaw
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61F 2009/00887 Cataract
• CPC Class Codes: A61F 9/00754 for cutting or perforating the anterior lens capsule, e.g. capsulotomes
• CPC Class Codes: A61F 9/00763 with rotating or reciprocating cutting elements, e.g. concentric cutting needles atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016

Abstract

Devices, systems, and methods for performing an ophthalmic procedure in an eye are disclosed. The devices include a hand-held portion and a distal, elongate member coupled to the hand-held portion having a lumen operatively coupled to a vacuum source. A drive mechanism operatively coupled to the elongate member is configured to oscillate the elongate member. When in use, the device is configured to aspirate ocular material from the eye through the lumen. The drive mechanism retracts the elongate member with a retraction speed profile and advances the elongate member with an extension speed profile. The retraction speed profile is different from the extension speed profile.

Claims

1. A device for performing an ophthalmic procedure in an eye, the device comprising:

a hand-held portion comprising a proximal, reusable portion releasably coupleable to a distal, disposable portion;

the proximal, reusable portion comprising;

a motor; and

a rotatable coupler for releasably operatively coupling the motor to the distal, disposable portion,

the distal, disposable portion comprising;

a distal, elongate member comprising a lumen and an opening at a distal end region of the elongate member; and

a vacuum source driven by the motor and in fluid communication with the opening at the distal end region of the elongate member, wherein the vacuum source comprises a plurality of pistons, each piston of the plurality of pistons housed within a dedicated one of a plurality of cylinders, wherein the vacuum source is configured to deliver pulses of discontinuous negative pressure to the distal end region of the lumen.

2. The device of claim 1, wherein each of the plurality of cylinders comprises an inlet opening and an outlet opening, the inlet opening in fluid communication with the lumen of the elongate member.

3. The device of claim 1, wherein the negative pressure is from 10 inHg up to about 30 inHg.

4. The device of claim 1, wherein the pulses of discontinuous negative pressure have a cycling frequency of between about 1 Hz and about 100 Hz.

5. The device of claim 1, wherein a first pulse of negative pressure draws a first amount of fluid from the lumen of the elongate member into a first cylinder of the plurality of cylinders through the inlet opening, and wherein a first pulse of positive pressure within the first cylinder expels the first amount of fluid from the first cylinder through the outlet opening.

6. The device of claim 5, wherein a volume of the first amount of fluid is between about 0.1 mL up to about 1.0 mL.

7. The device of claim 5, wherein movement of a first piston of the plurality of pistons in a first direction within the first cylinder creates the first pulse of negative pressure, and wherein movement of the first piston in a second, opposite direction creates the first pulse of positive pressure.

8. The device of claim 7, further comprising a compliant valve positioned within the inlet opening.

9. The device of claim 8, wherein movement of the first piston a second distance in the second, opposite direction seals the inlet opening and transmits an amount of the first pulse of positive pressure through the compliant valve to the lumen of the elongate member.

10. The device of claim 9, wherein the amount transmitted causes a second amount of fluid to be expelled out the opening at the distal end region of the elongate member.

11. The device of claim 5, wherein the outlet opening is regulated by a valve.

12. The device of claim 11, wherein the valve is a ball type check valve.

13. The device of claim 11, wherein the outlet opening is in fluid communication with an evacuation chamber.

14. The device of claim 1, wherein the device further comprises a rotational cam assembly operatively coupled to the elongate member and operatively coupled to the motor, the rotational cam assembly configured to oscillate the elongate member.

15. The device of claim 14, wherein in use, the rotational cam assembly causes reciprocation of the elongate member in a proximal direction with a retraction speed profile and in a distal direction with an extension speed profile, and further wherein the retraction speed profile is different from the extension speed profile.

16. The device of claim 15, wherein an average retraction speed of the elongate member from the retraction speed profile is lower than an average extension speed of the elongate member from the extension speed profile.

17. The device of claim 14, wherein the rotational cam assembly operatively coupled to the elongate member is configured to asymmetrically oscillate the elongate member.

18. The device of claim 17, wherein the extension speed profile comprises a maximum extension speed and the retraction speed profile comprises a maximum retraction speed, and further wherein the maximum retraction speed is less than the maximum extension speed.

19. The device of claim 14, wherein the rotational cam assembly is operatively coupled to the plurality of pistons, the rotational cam assembly configured to cause the vacuum source to generate the pulses of discontinuous negative pressure.

20. The device of claim 14, wherein the rotational cam assembly is positioned within the distal, disposable portion.