Patent Number: 6,309,374

Title: Injection apparatus and method of using same

Abstract: The present invention relates to an apparatus and method for using the apparatus for injecting an agent into a tissue, particularly into thin tissues such as the sclera of the eye. The invention provides an apparatus and method for effectively imbedding a needle into a tissue at a predetermined penetration approach angle and penetration distance thereby reducing the risk of penetrating the full thickness of the tissue. The invention includes a support element and a needle guide platform disposed on the support element with an external support surface and a channel extending therethrough and terminating in an aperture at the support surface. A needle disposed in the channel is axially movable along an axis of injection through the channel. The needle is movable from a first retracted position to an extended position corresponding to the penetration distance, along the axis of injection. The axis of injection forms a penetration approach angle of up to about 60.degree. with a tangent of the support surface at a point of intersection of the axis of injection with the projection of the support surface across the aperture.

Inventors: Hecker; Karl I. (Keene, NH), Clark; Leslie A. (Alameda, CA), Pfeiffer; James F. (Oakland, CA), Bowman; Lyle M. (Pleasanton, CA)

Assignee: Insite Vision Incorporated

International Classification: A61F 9/007 (20060101); A61M 25/02 (20060101); A61M 25/04 (20060101); A61M 5/46 (20060101); A61M 5/34 (20060101); A61M 5/32 (20060101); A61M 005/00 ()

Expiration Date: 10/30/2018