Methods for intraocular shunt placement
Intraocular pressure can be reduced by insertion of an intraocular shunt in the eye such that it forms a drainage pathway between the anterior chamber and a region of lower pressure. A hollow shaft that holds an intraocular shunt can be advanced through the anterior chamber. The sclera can be penetrated with the hollow shaft. A beveled tip of the shaft can be oriented such that a beveled surface thereof faces toward the Tenon's capsule when the beveled tip passes out of the sclera. After the beveled tip passes out of the sclera, at least a portion of the shunt can be advanced from the hollow shaft.
1. A method of delivering an intraocular shunt into an eye having an anterior chamber, a sclera, and a Tenon's capsule, the method comprising the steps of:
advancing a hollow shaft through the anterior chamber, the hollow shaft (a) having a beveled tip at a distal end of the hollow shaft and (b) holding the intraocular shunt with a proximal end of the shunt within the hollow shaft and a distal end of the shunt positioned closer to the distal end of the hollow shaft than is the proximal end of the shunt, the shunt comprising a pharmaceutical or biological agent deliverable to the eye;
penetrating the sclera with the hollow shaft;
orienting a beveled surface of the beveled tip such that the beveled surface faces toward the Tenon's capsule when the beveled tip passes out of the sclera;
after the beveled tip passes out of the sclera, advancing at least a portion of the shunt from the hollow shaft; and
positioning the proximal end of the shunt in the anterior chamber;
wherein the shunt comprises a pharmaceutical or biological agent deliverable to the eye after release of the shunt into the eye.
2. The method of claim 1 , further comprising the step of injecting an aqueous solution into the eye.
3. The method of claim 2 , wherein the aqueous solution is injected between the sclera and the Tenon's capsule such that the Tenon's capsule is ballooned away from the sclera.
4. The method of claim 1 , wherein the eye has a cornea, the method further comprising inserting the hollow shaft through the cornea.
5. The method of claim 1 , wherein the method is performed without inducing subconjunctival blebbing.
6. The method of claim 1 , wherein the shunt is deployed into the eye without use of an optical apparatus that directly contacts the eye.
7. The method of claim 1 , wherein the shunt is deployed into the eye with use of an optical apparatus that does not directly contact the eye.
8. The method of claim 1 , wherein the beveled surface is oriented to be parallel to the Tenon's capsule when the beveled tip passes out of the sclera.
9. The method of claim 1 , further comprising pushing the Tenon's capsule away from the sclera using the beveled surface.
10. The method of claim 1 , further comprising pushing the tip of the hollow shaft against the Tenon's capsule without piercing the Tenon's capsule.
11. The method of claim 1 , wherein at least a portion of the shunt is advanced from the hollow shaft into a subconjunctival space.
12. The method of claim 11 , wherein at least a portion of the shunt is advanced from the hollow shaft into a space between the sclera and the Tenon's capsule.
13. The method of claim 1 , wherein the pharmaceutical or biological agent comprises a coating on a surface of the shunt.
14. The method of claim 13 , wherein the pharmaceutical or biological agent comprises a coating on an exterior surface of the shunt.
15. The method of claim 13 , wherein the pharmaceutical or biological agent comprises a coating on an interior surface of the shunt.
16. The method of claim 1 , wherein a portion of the shunt is impregnated with the pharmaceutical or biological agent.
17. A method of delivering an intraocular shunt into an eye having an anterior chamber, a sclera, and a Tenon's capsule, the method comprising the steps of:
inserting into the anterior chamber a hollow shaft, the hollow shaft (a) having a beveled tip at a distal end of the hollow shaft and (b) holding the intraocular shunt with a proximal end of the shunt within the hollow shaft and a distal end of the shunt positioned closer to the distal end of the hollow shaft than is the proximal end of the shunt, the shunt comprising a pharmaceutical or biological agent deliverable to the eye;
advancing the hollow shaft into the sclera;
orienting a beveled surface of the beveled tip such that the beveled surface faces away from the sclera when the beveled tip passes out of the sclera;
after the beveled tip passes out of the sclera, advancing at least a portion of the shunt from the hollow shaft;
with the proximal end of the shunt in the anterior chamber, retracting the hollow shaft from the shunt;
wherein the shunt comprises a pharmaceutical or biological agent deliverable to the eye after release of the shunt into the eye.
18. The method of claim 17 , further comprising the step of injecting an aqueous solution into the eye.
19. The method of claim 18 , wherein the aqueous solution is injected between the sclera and the Tenon's capsule such that the Tenon's capsule is ballooned away from the sclera.
20. The method of claim 17 , wherein the eye has a cornea, the method further comprising inserting the hollow shaft into the eye through the cornea.
21. The method of claim 17 , wherein the method is performed without inducing subconjunctival blebbing.
22. The method of claim 17 , wherein the shunt is deployed into the eye without use of an optical apparatus that directly contacts the eye.
23. The method of claim 17 , wherein the shunt is deployed into the eye with use of an optical apparatus that does not directly contact the eye.
24. The method of claim 17 , wherein the beveled surface is oriented to be parallel to the Tenon's capsule when the beveled tip passes out of the sclera.
25. The method of claim 17 , further comprising pushing the Tenon's capsule away from the sclera using the beveled surface.
26. The method of claim 17 , further comprising pushing the tip of the hollow shaft against the Tenon's capsule without piercing the Tenon's capsule.
27. The method of claim 17 , wherein at least a portion of the shunt is advanced from the hollow shaft into a subconjunctival space.
28. The method of claim 27 , wherein at least a portion of the shunt is advanced from the hollow shaft into a space between the sclera and the Tenon's capsule.
29. The method of claim 17 , wherein the pharmaceutical or biological agent comprises a coating on a surface of the shunt.
30. The method of claim 29 , wherein the pharmaceutical or biological agent comprises a coating on an exterior surface of the shunt.
31. The method of claim 29 , wherein the pharmaceutical or biological agent comprises a coating on an interior surface of the shunt.
32. The method of claim 17 , wherein a portion of the shunt is impregnated with the pharmaceutical or biological agent.