Surgical instrument and method for removing the lens of an eye

• US 4,950,272 A
• Filed: 06/19/1989
• Issued: 08/21/1990
• Est. Priority Date: 06/19/1989
• Status: Expired due to Fees

• Current Assignee: Heinz J. Smirmaul
• Original Assignee: Heinz J. Smirmaul
• Inventors: Smirmaul, Heinz J.
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): Cofsky, Lynda M.
• Application Number:
  US07/367,937
• Time in Patent Office: 428 Days
• Field of Search: 606/107, 606/110, 606/161, 606/166, 606/167, 606/190
• US Class Current: 606/107
• CPC Class Codes: A61F 9/00736 Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments A61F9/008 takes precedence

Abstract

In accordance with the present invention, an ophthalmic surgical instrument for removing the lens of an eye includes a handle adapted for support in the hand of the user. An elongated tubular member having first and second ends is attached to the handle. The elongated tubular member includes an aperture communicating with the interior of the elongated tubular member and which is disposed between the first and second ends thereof. An arcuate portion of the elongated tubular member extends from the aperture to the second end thereof for receiving the lens. An actuator is mounted to the handle for movement between a forward position and a rearward position with respect to the handle. An elongated rod is disposed within the elongated tubular member and is attached to the actuator, such that movement of the actuator to the forward position causes the rod to extend from the elongated tubular member aperture toward the second end of the elongated tubular member to engage the lens thereby lodging the lens between the second end of the rod and the second end of the elongated tubular member for removal of the lens from the eye. Movement of the actuator to the rearward position causes the rod to retract within the elongated tubular member when not engaging the lens.

Claims

1. An ophthalmic surgical instrument for removing, in substantially one piece, the lens of an eye having an anterior chamber and a posterior chamber, comprising:

a handle adapted for support in a hand of a user;

an elongated tubular member having first and second ends, said first end thereof being attached to said handle, said elongated tubular member including an aperture communicating with the interior of said elongated tubular member and being disposed between said first and second ends, said elongated tubular member further including an arcuate portion extending from said aperture to said second end thereof defining an arc of conforming size and shape to the profile of the lens for receiving the entire lens therein and within the posterior chamber of the eye;

said second end having engaging means for grasping a circumferential portion of the lens;

actuator means mounted to said handle for movement between a forward position and a rearward position with respect to said handle; and

an elongated rod disposed within said elongated tubular member and having first and second ends, said first end thereof being attached to said actuator means, such that movement of said actuator means to said forward position causes said rod second end to extend from said elongated tubular member aperture toward said second end of said elongated tubular member to engage in the lens, thereby lodging substantially the entire lens between said rod second end and said second end of said elongated tubular member for fixating the lens within said arcuate portion thereby preventing movement of the lens towards the anterior chamber of the eye and for removing the lens in substantially one piece from the eye, and movement of said actuator means to said rearward position causes said rod to retract within said elongated tubular member when not engaging the lens.

2. The ophthalmic surgical instrument of claim 1 wherein said handle comprises a syringe and said actuator means comprises a syringe plunger.

3. The ophthalmic surgical instrument of claim 1 wherein said second end of said elongated tubular member includes a point for engaging the lens.

4. A method for removing, in substantially one piece, the lens of an eye having an anterior chamber and a posterior chamber, divided by the iris of the eye, the lens being normally disposed in the posterior chamber comprising the steps of:

inserting into the anterior chamber of the eye a surgical instrument having a handle and an elongated tubular member having first and second ends, the first end thereof being attached to the handle, the elongated tubular member including an aperture communicating with the interior of the elongated tubular member and disposed between the first and second ends thereof, the elongated tubular member further including an arcuate portion extending from the second end thereof and defining an arc of conforming size and shape to the profile of the lens for receiving the lens therein, the instrument further including an actuator mounted to the handle and a rod disposed within the elongated tubular member and having first and second ends, the first end thereof being attached to the actuator;

moving the actuator to a rearward position with respect to the handle, such that the rod is retracted within the elongated tubular member;

rotating the arcuate portion of the elongated tubular member within the posterior chamber of the eye and around the entire lens, such that substantially the entire lens is positioned above the arcuate portion and between the elongated tubular member aperture and the second end thereof;

moving the actuator to a forward position with respect to the handle, such that the rod is extended form the elongated tubular member aperture to engage the lens and thereby lodge the lens between the second end of the rod and the second end of the elongated tubular member thereby fixating the lens within the arcuate portion to prevent movement of the lens towards the anterior chamber of the eye; and

removing the surgical instrument from the eye with substantially the entire lens lodged therein.

5. The method of claim 4 wherein the step of moving the actuator to the forward position causes the rod and second end of the elongated tubular member to pierce the lens.