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Claims for Patent: 6,899,717

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Claims for Patent: 6,899,717

Title: Methods and apparatus for delivery of ocular implants
Abstract:An apparatus and methods for delivering ocular implants or microimplants. The apparatus is ergonomically designed for ease of use, and a simple manual depression of an actuator produces proportional movement of a linkage causing the implant or microimplant to be ejected through a cannula disposed at the desired location in the eye. Small gauge cannulas are provided for self-sealing methods of delivery.
Inventor(s): Weber; David (Danville, CA), Kane; Ingrid (Los Altos, CA), Rehal; Mike (Boulder Creek, CA), Lathrop, III; Robert L. (Santa Clara, CA), Aptekarev; Kenny (Santa Cruz, CA)
Assignee: Allergan, Inc. (Irvine, CA)
Application Number:10/246,884
Patent Claims: 1. A method of delivering an ocular microimplant into a patient's eye comprising the steps of: (a) providing a cannula having a proximal end, a distal sharp end, and a lumen extending therethrough, a microimplant retained within the lumen, and a push rod received through the proximal end of the cannula; (b) puncturing the outer layer of a patient's eye with the cannula and inserting the cannula into a patient's eye to a desired location; (c) moving the push rod from the proximal end of the cannula toward the distal end of the cannula, thereby ejecting the microimplant from the cannula; and (d) removing the cannula and push rod from the patient's eye; wherein the puncture in the patient's eye created by the insertion of the cannula in step (c) is self-sealing upon the removal of the cannula in step (d).

2. The method of claim 1 wherein the providing step (a) further comprises providing a cannula having an outer diameter of 0.032 inches or less.

3. The method of claim 1 wherein the providing step (a) further comprises providing a cannula having an outer diameter of approximately 0.028 inches or less.

4. The method of claim 1 wherein the providing step (a) further comprises providing a cannula wherein the cannula lumen has a cross-sectional area of 0.0008 square inches or less.

5. The method of any one of claims 1-4 wherein the puncturing step (b) further comprises inserting the cannula into the patient's eye at an angle of 45.degree. or less relative to the eye surface.
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