Implantable punctal plug

• US 8,235,053 B2
• Filed: 09/08/2010
• Issued: 08/07/2012
• Est. Priority Date: 09/08/2010
• Status: Active Grant

• Current Assignee: Alcon Research Limited (Nestle SA)
• Original Assignee: Alcon Research Limited (Nestle SA)
• Inventors: Sanchez, Robert Joseph Jr., Lind, Casey Jean
• Primary Examiner(s): Bianco, Patricia
• Assistant Examiner(s): Patel, Tarla
• Application Number:
  US12/877,437
• Publication Number:
  US 20120055490A1
• Time in Patent Office: 699 Days
• Field of Search: 128/887, 128/846, 604 7- 10, 604/500, 604/521, 604/19, 604/27, 604/28, 604/264, 604/294, 604/107, 604/108, 604/289, 604/290, 604/540, 604/541, 604/523, 604/317, 604/285, 604/907, 606/185, 606/167, 606/191, 606/107, 606/108, 623/4.1, 623/11.11, 623/23.71, 623/23.64
• US Class Current: 128/887
• CPC Class Codes: A61F 9/0017 implantable in, or in contact with, the eye, e.g. ocular inserts
• CPC Class Codes: A61F 9/00772 Apparatus for restoration of tear ducts
• CPC Class Codes: A61K 9/0051 Ocular inserts, ocular implants

Abstract

A punctal plug is disclosed, wherein the punctal plug includes a body portion and a retaining portion. The body portion is defined by an open distal end, an open proximal end and a wall portion. The wall portion further includes at least one window extending therethrough. The retaining flange is configured to have an outer periphery that is larger than the outer periphery of the body portion. A method of delivering a therapeutic agent to a patient using a punctal plug is also disclosed.

Claims

1. A punctal plug, comprising:

a body portion; and

a retaining flange;

wherein the body portion is defined by an open distal end, an open proximal end and a wall portion, wherein the wall portion further includes at least one window extending therethrough such that at least some of a drug formulation injected into the body portion will flow through at least one of the at least one windows and wherein at least some of the drug formulation injected into the body portion will flow out the open distal end; and

wherein the retaining flange is configured to have an outer periphery that is larger than the outer periphery of the body portion.

2. The punctal plug of claim 1, wherein the body portion further comprises a plurality of windows formed therein, wherein the windows are located equi-distant from one another.

3. The punctal plug of claim 1, wherein the retaining flange is defined by a distal end and a proximal end, wherein the distal end is fixedly connected to the proximal end of the body portion and has an outer periphery that is substantially the same size and configuration as an outer periphery of the proximal end of the body portion.

4. The punctal plug of claim 3, wherein the retaining flange is contoured outwardly toward the proximal end of the retaining flange.

5. The punctal plug of claim 1, wherein the retaining flange further comprises at least one retaining member formed thereon, wherein the retaining member is configured for releasably attaching to a delivery cannula.

6. The punctal plug of claim 5, wherein the retaining member is an inwardly extending protrusion.

7. The punctal plug of claim 1, wherein the body portion and retaining flange are constructed of a biocompatible material.

8. A punctal plug, comprising:

a body portion; and

a retaining flange;

at least one cross-member, wherein the cross-member is defined by first and second ends that are fixedly secured to an interior surface of the wall portion of the body portion;

wherein the body portion is defined by an open distal end, an open proximal end and a wall portion, wherein the wall portion further includes at least one window extending therethrough; and

wherein the retaining flange is configured to have an outer periphery that is larger than the outer periphery of the body portion.

9. The punctal plug of claim 8, comprising a pair of cross-members, wherein a first cross-member is positioned above a second cross member.

10. The punctal plug of claim 9, wherein the cross-members are arranged such that the cross-members intersect one another.

11. The punctal plug of claim 8, comprising a pair of cross-members integrally connected together so as to intersect one another and such that the cross-members lie in the same plane.