Eye mounted device for therapeutic agent release
The present disclosure relates to devices and systems for targeted and controlled delivery of a therapeutic agent to a treatment site of an eye. Particularly, aspects are directed to a therapeutic agent delivery device that includes a polymeric substrate having a release region, a delivery region, and a receiving region; one or more reservoirs formed within the release region; a therapeutic agent disposed within the one or more reservoirs; an active, passive, or combination thereof controlled release mechanism for release of the therapeutic agent from the one or more reservoirs into the delivery region; and a circuit formed on the polymeric substrate, the circuit having a current source, a first iontophoresis electrode located within the delivery region for transport of the therapeutic agent from the delivery region into a target tissue via electromigration, and a second iontophoresis electrode located within the receiving region for maintaining electroneutrality within the tissue.
1. A therapeutic agent delivery device comprising a polymeric substrate, wherein the polymeric substrate comprises:
a release region comprising:
one or more reservoirs configured to hold a therapeutic agent,
a mechanism configured to control a release of the therapeutic agent from the one or more reservoirs;
a delivery region in fluid communication with the release region configured to receive the therapeutic agent released from the one or more reservoirs, comprising a first ionophoresis electrode configured to transport the therapeutic agent released from the one or more reservoirs into a target tissue via electromigration, and
a receiving region comprising a second iontophoresis electrode configured to maintain electroneutrality within the target tissue,
wherein a circuit is formed between a current source, the first iontophoresis electrode, and the second ionophoresis electrode.
2. The therapeutic agent delivery device of claim 1 , wherein the mechanism is an active controlled release mechanism and/or a passive controlled release mechanism.
3. The therapeutic agent delivery device of claim 1 , wherein the current source is formed on the polymeric substrate.
4. The therapeutic agent delivery device of claim 1 , wherein the current source is formed within the polymeric substrate.
5. The therapeutic agent delivery device of claim 1 , wherein the first iontophoresis electrode comprises an anode and the second iontophoresis electrode comprises a cathode.
6. The therapeutic agent delivery device of claim 1 , wherein the polymeric substrate comprises a distal surface and a proximal surface with one or more layers of polymer disposed between the distal surface and the proximal surface.
7. The therapeutic agent delivery device of claim 1 , wherein the target tissue is a vitreous humor, a sclera, or a cornea.
8. The therapeutic agent delivery device of claim 1 , wherein the release region and the delivery region at least partially co-located within the polymeric substrate.
9. The therapeutic agent delivery device of claim 1 , wherein the release region and the delivery region are located in different locations within the polymeric substrate.
10. The therapeutic agent delivery device of claim 1 , wherein the therapeutic agent is provided in a liquid from, a gel form, and/or a powder form.
11. The therapeutic agent delivery device of claim 1 , wherein the one or more reservoirs comprise a plurality of reservoirs each configured to house the therapeutic agent.
12. The therapeutic agent delivery device of claim 1 , wherein the one or more reservoirs comprise a plurality of reservoirs each configured to house a different therapeutic agent.
13. The therapeutic agent delivery device of claim 1 , wherein the polymeric substrate comprises at least one of a polyimide, a liquid crystal polymer, a parylene, a polyether ether ketone, a polyethylene terephthalate, a poly(methyl methacrylate), a polyurethane, a rigid gas permeable fluorosilicone acrylate, a silicon-based polymer, a silicone acrylate, a cyclic olefin co-polymer (COP/COC), and a hydrogel.
14. The therapeutic agent delivery device of claim 1 , wherein the release region comprises a single reservoir that is located separate from the first delivery region.
15. The therapeutic agent delivery device of claim 1 , wherein the release region comprises a single reservoir that is located in contact with the delivery region.
16. The therapeutic agent delivery device of claim 1 , wherein the first ionophoresis electrode comprises a silver electrode and the second ionophoresis electrode comprises a silver chloride electrode.
17. The therapeutic agent delivery device of claim 1 , wherein the mechanism comprises a metallic thin film electronically connected to the current source.
18. The therapeutic agent delivery device of claim 17 , wherein the mechanism further comprises a valve.
19. The therapeutic agent delivery device of claim 1 , further comprising one or more processors formed on or within the polymeric substrate and electrically connected to the current source; a battery formed on or within the polymeric substrate and electrically connected to the current source; and an antenna formed on or within the polymeric substrate and electrically connected to the one or more processors.
20. The therapeutic agent delivery device of claim 1 , further comprising an overmold polymeric layer formed around the polymeric substrate.
21. The therapeutic agent delivery device of claim 20 , wherein the overmold polymeric layer leaves one or more access points of the polymer substrate exposed.