Ophthalmic surgical apparatus for pulverizing and removing the lens nucleus from the eye of a living being

• US 5,807,401 A
• Filed: 11/02/1995
• Issued: 09/15/1998
• Est. Priority Date: 11/07/1994
• Status: Expired due to Fees

• Current Assignee: Grieshaber & Company AG Schaffhausen
• Original Assignee: Grieshaber & Company AG Schaffhausen
• Inventors: Stegmann, Robert, Grieshaber, Hans R.
• Primary Examiner(s): Brown, Michael A.
• Assistant Examiner(s): YU, JUSTINE ROMANG
• Application Number:
  US08/552,355
• Time in Patent Office: 1,048 Days
• Field of Search: 606/107, 606/166, 606/167, 606/169, 606/170, 606/171, 606/172, 604/22
• US Class Current: 606/107
• 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

An ophthalmic surgical device for pulverizing the lens nucleus in the eye and for removing particles of the macerated lens nucleus from the eye of a living being, includes a housing which supports a mounting that receives at its forward end a guide tube. Set within the guide tube is a tubular probe which has one end carrying a cutting element and another end operatively connected to a motor for rotating the tubular probe together with the cutting element and/or moving the tubular probe together with the cutting element in axial direction relative to the stationary guide tube.

Claims

1. An ophthalmic surgical device for pulverizing a lens nucleus in an eye and for removing particles of the pulverized lens nucleus from the eye of a living being, comprising:

a housing defining an axis and being adapted for gripping by a user;

a mounting attached to one axial end of said housing and including a forward end supporting a guide tube which has an upper edge and is formed with a prolongation extending outwardly in axial direction from the upper edge and so shaped as to form a clamping jaw;

cutting means for shattering the lens nucleus, said cutting means including a tubular probe movable and rotatable relative to the guide tube, said tubular probe defining an interior space and so received coaxially in said guide tube that a feed channel is formed between said tubular probe and said guide tube, and a working head attached to said tubular probe and having an inlet opening in axial direction and in communication with the interior space of said tubular probe, said working head exhibiting a substantially horizontal top surface in the form of a plurality of circumferentially spaced radial cutting elements spaced around the inlet opening, with the clamping jaw extending parallel to the working head;

fluid supply means connected to the feed channel for supplying irrigation fluid to a surgical site; and

suction means for drawing excess fluid and particles of the lens nucleus being pulverized by said cutting element through said inlet opening of said working head into the interior space of and said tubular probe.

2. Apparatus as defined in claim 1 wherein said guide tube is stationarily secured in said mounting so as to be prevented from executing a rotational motion, and further comprising drive means positioned in said housing for moving said tubular probe together with said cutting element relative to said guide tube in direction of said axis and for rotating said tubular probe together with said cutting element about said axis.

3. Apparatus as defined in claim 2 wherein said drive means oscillates said tubular probe and said cutting element at a high frequency.

4. Apparatus as defined in claim 1 wherein said prolongation is of arcuated configuration clamping.

5. Apparatus as defined in claim 1 further comprising drive means for moving said working head in an axial direction relative to said clamping jaw in a first phase and rotating said working head about the axis in a second phase.

6. Apparatus as defined in claim 1 wherein said guide tube has an outer diameter, said clamping jaw being of tapered configuration and exhibiting a radial dimension that approximately covers the outer diameter of said guide tube.

7. Apparatus as defined in claim 1 wherein the inlet opening of the working head is surrounded by an abrasive texture.

8. Apparatus as defined in claim 1 wherein the clamping jaw has a free end of rounded configuration.

9. Apparatus as defined in claim 1 wherein the top surface of the working head is of circular ring shaped configuration.

10. An ophthalmic surgical device for pulverizing a lens nucleus in an eye and for removing particles of the pulverized lens nucleus from the eye of a living being, comprising:

a housing defining an axis and being adapted for gripping by a user;

a mounting attached to one axial end of said housing and including a guide tube having an upper edge and including a prolongation extending outwardly in axial direction from the upper edge to terminate in a clamping jaw which extends parallel at a distance to the upper edge of the guide tube;

cutting means for shattering the lens nucleus particles, said cutting means including a rotating cutting element formed with an inlet opening and exhibiting a top surface in form of a plurality of circumferentially spaced radial cutting elements spaced around the inlet opening and positioned at a distance to said clamping jaw to define a cavity for retaining lens particles;

drive means operatively connected to said cutting means for moving said cutting element in a direction of said clamping jaw for shattering lens particles clamped in the cavity; and

suction means for drawing excess fluid and particles of the lens nucleus being pulverized by said cutting element during movement in direction of said clamping jaw and discharged through the inlet opening.

11. Apparatus as defined in claim 10 wherein said prolongation is of arcuated configuration, said clamping jaw extending at an angle from said prolongation in parallel relationship to said cutting element.

12. Apparatus as defined in claim 10 wherein said guide tube has an outer diameter, said clamping jaw being of tapered configuration and exhibiting a radial dimension that approximately covers the outer diameter of said guide tube.

13. Apparatus as defined in claim 10 wherein the clamping jaw has a free end of rounded configuration.

14. Apparatus as defined in claim 10 wherein the top surface of the cutting element is of circular ring shaped configuration.