Process for cataract extraction

• US 4,732,150 A
• Filed: 06/10/1986
• Issued: 03/22/1988
• Est. Priority Date: 06/14/1984
• Status: Expired due to Fees

• Current Assignee: Gerald T. Keener Jr
• Original Assignee: Gerald T. Keener Jr
• Inventors: Keener, Gerald T. Jr.
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US06/872,635
• Time in Patent Office: 651 Days
• Field of Search: 128/305, 128/320, 128/1 R, 604/22
• US Class Current: 606/107
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• 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

A process and device for inserting a wire loop around the lens nucleus and then constricting the loop. The constricting loop divides the nucleus in half (or thirds, fourths, etc.), thus allowing it to be removed through an incision of approximately 6.5 mm.

Claims

1. In a process for removing a cataract including the steps of:

(a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera;

(b) making a puncture wound into the anterior chamber of the eye;

(c) enlarging the puncture wound to provide a larger incision;

(d) removing the anterior capsule from the cataract; and

,

(e) displacing the nucleus into the anterior chamber;

the improvement which comprises the steps of;

suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces; and

cutting the nucleus in multiple sections by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.

2. The process of claim 1 wherein the steps of enlarging said puncture wound is accomplished by enlarging the wound until said incision has a chord length of approximately 6.5 mm.

3. In a process for removing a cataract including the steps of:

(a) peeling the conjunctival layer of the eye from the incision site at the junction of the cornea and sclera;

(b) making a puncture wound into the anterior chamber of the eye;

(c) enlarging the puncture wound to provide a larger incision;

(d) removing the anterior capsule from the cataract; and

,

(e) displacing the nucleus into the anterior chamber;

the improvement which comprises the steps of;

suspending the nucleus by means of a liquid in such a position that it is separated from internal eye surfaces; and

,

dividing the nucleus in multiple sections with a wired instrument by placing a loop of wire around the nucleus and constricting it and then removing the individual sections through the incision.

4. The process of claim 3 wherein the steps of enlarging said puncture wound is accomplished by enlarging the wound until said incision has a chord length of approximately 6.5 mm.