Electrocycloablation apparatus and method

• US 5,174,304 A
• Filed: 05/13/1991
• Issued: 12/29/1992
• Est. Priority Date: 02/16/1990
• Status: Expired due to Fees

• Current Assignee: Mark A. Latina
• Original Assignee: Mark A. Latina
• Inventors: Latina, Mark A., Park, Robert I.
• Primary Examiner(s): Shay, David M.
• Application Number:
  US07/699,157
• Time in Patent Office: 596 Days
• Field of Search: 606/32, 606/34, 606/37-42, 606/45, 606/48-52, 128/783, 128/791, 128/793, 128/799, 128/898, 604/20
• US Class Current: 607/141
• CPC Class Codes: A61B 18/14 Probes or electrodes therefor
• CPC Class Codes: A61B 2018/1266 with DC current output
• CPC Class Codes: A61F 9/00781 Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment drainage implants in general A61M27/002
• CPC Class Codes: A61F 9/0079 using non-laser electromagnetic radiation, e.g. non-coherent light or microwaves
• CPC Class Codes: A61M 3/0279 Cannula; Nozzles; Tips; their connection means

Abstract

Apparatus and non-invasive method for focal transcleral destruction of living human eye tissue. The apparatus includes a pair of conical-shaped probes, each probe filled with an ionic probe solution and having therein an electrode connected to a constant current supply. The method includes lowering the narrow aperture end of the probes onto the conjunctiva overlying the target tissue, each probe being approximately 90° apart from the other about the eye surface. The probes of the invention have opposite polarity to enable transfer of ions between the probes. Electrodes are of appropriate conductive materials.

Claims

1. A non-invasive method for focal non-invasive transcleral destruction of living human eye tissue, comprising the steps of:

A. providing a constant current supply having a positive terminal and a negative terminal;

B. providing a pair of hollow probes, each of said probes having a distal end and a proximal end, and a first aperture at said distal end of each hollow probe to receive a conductive electrode of predetermined composition and means for filling said probe with a predetermined solution;

C. connecting said conductive electrode of one of said probes to said positive terminal, defining a first probe, and connecting said conductive electrode of the other of said probes to said negative terminal, defining a second probe;

D. filling each of said probes with a solution of predetermined ionic concentration;

E. adjusting said constant current supply to a predetermined current;

placing, substantially simultaneously, said proximal ends of said probes repeatedly onto a surface of a human eye proximate to target eye tissue at a plurality of locations; and

G. maintaining movement of said proximal ends for a predetermined duration.

2. The method of claim 1 wherein said placing includes positioning said proximal ends spatially apart from one another, by approximately 90 degrees.

3. The method of claim 1 wherein said conductive electrode of said first probe comprises a substantially pure metal, and wherein step D further comprises filling said first probe with a probe solution having a concentration of said negative ion of a salt of said electrode metal in an amount sufficient to transfer ions into said target tissue and prevent excessive damage to said surface of said human eye.

4. The method of claim 3 wherein said conductive electrode of said second probe comprises a metal/metal salt composition, and wherein step D further comprises filling said second probe with an ionic probe solution having a concentration of a negative ion of a salt of said electrode metal.

5. The method of claim 1 wherein said placement step F is repeatedly performed for a predetermined number of times.

6. The method of claim 1 wherein placement step F is performed prior to adjusting step E.

7. The method of claim 1 further comprising the step of substantially simultaneously rotating each of said probes about said target eye tissue.