Ocular implant with double anchor mechanism
The invention relates generally to medical devices and methods for the treatment of ocular disorders. One method provides an implant having an inlet portion with a first anchor and an outlet portion with a second anchor. The implant is implanted in tissue of an eye such the implant conducts fluid from an anterior chamber of the eye to a physiological outflow pathway of the eye. The implanting involves positioning the first anchor adjacent eye tissue, positioning the second anchor within the physiological outflow pathway, and deploying the second anchor such that the second anchor secures the implant within the physiological outflow pathway and a distal end of the second anchor is positioned further into the physiological outflow pathway than an outlet of the outlet portion.
1. A method of treating an ocular disorder, comprising:
providing an implant comprising an inlet portion having a first anchor and an outlet portion having a second anchor;
introducing the implant into an anterior chamber of an eye such that at least the second anchor of the implant is temporarily in the anterior chamber; and
implanting the implant in tissue of the eye such that the implant conducts fluid from the anterior chamber of the eye to a physiological outflow pathway of the eye, said implanting comprising:
positioning the first anchor adjacent eye tissue;
positioning the second anchor within the physiological outflow pathway; and
deploying the second anchor so that the second anchor changes from a first shape to a second shape such that the second anchor in the second shape secures the implant within the physiological outflow pathway and a distal end of the second anchor is positioned farther into the physiological outflow pathway than an outlet of the outlet portion;
wherein the implant has a longitudinal axis extending therethrough and terminating at a distal-most end of the implant wherefrom extends a generally transverse and continuous distal surface of the implant, and wherein when deployed a part of the second anchor contacts a sclera of the eye such that said part of the second anchor is disposed intermediate the distal surface of the implant and a proximal end of the second anchor.
2. The method of claim 1 , wherein positioning the first anchor comprises positioning at least one flexible wing of the first anchor adjacent the eye tissue.
3. The method of claim 1 , wherein positioning the first anchor comprises positioning a flexible rim of the first anchor adjacent the eye tissue.
4. The method of claim 1 , wherein positioning the second anchor comprises positioning at least one expandable rib of the second anchor within the physiological outflow pathway.
5. The method of claim 1 , wherein deploying the second anchor comprises actuating a toggle mechanism that causes the second anchor to expand within the physiological outflow pathway.
6. The method of claim 5 , wherein actuating a toggle mechanism comprises turning a pin that extends into the implant to deploy a rib of the second anchor in the physiological outflow pathway.
7. The method of claim 6 , wherein turning a pin that extends into the implant comprises positioning at least one opening of a hollow portion of the pin such that the at least one opening is in fluid communication with the physiological outflow pathway to allow flow of fluid from the anterior chamber to the physiological outflow pathway, and wherein said at least one opening comprises the outlet of the outlet portion.
8. The method of claim 1 , wherein deploying the second anchor comprises actuating a pop-rivet mechanism that causes the second anchor to expand within the physiological outflow pathway.
9. The method of claim 8 , wherein actuating the pop-rivet mechanism comprises pulling a rod that extends into said implant to deploy a rib of the second anchor in the physiological outflow pathway.
10. The method of claim 1 , wherein the physiological outflow pathway comprises Schlemm's canal.
11. The method of claim 10 , wherein the eye tissue comprises trabecular meshwork.
12. The method of claim 1 , wherein positioning the first anchor comprises positioning the first anchor adjacent eye tissue within the anterior chamber.
13. The method of claim 1 , wherein the second anchor, when deployed, has a distally tapering portion.
14. The method of claim 1 , wherein the second anchor, when deployed, has a proximally tapering portion.
15. The method of claim 1 , wherein when the second anchor is deployed the outlet is positioned proximal to the distal end of the second anchor.
16. The method of claim 1 , wherein, when the second anchor is deployed, the second anchor comprises a proximally tapering portion.
17. The method of claim 1 , wherein, when deployed, the second anchor comprises a distally tapering portion.
18. The method of claim 17 , wherein, when deployed, the second anchor comprises a proximally tapering portion proximal of the distally tapering portion.
19. The method of claim 18 , wherein, when the second anchor is deployed, the outlet of the outlet portion is substantially at a junction of the proximally and distally tapering portions of the second anchor.
20. The method of claim 1 , wherein, prior to deployment, the first anchor and the second anchor extend substantially parallel to one another.
21. The method of claim 20 , wherein, prior to deployment, the first anchor and the second anchor extend substantially towards said distal surface.