Semi-permanent transcorneal filter support and in vivo surgical implantation technique for open-angle glaucoma treatment.

Semi-permanent transcorneal filter support and in vivo surgical implantation technique for open-angle glaucoma treatment. Biomed Microdevices. 2019 Nov 04;21(4):92 Authors: Collar B, Simón G, Yuan Q, Shen S, Irazoqui P Abstract Primary open-angle glaucoma is a progressive disease affecting nearly 60 million people worldwide which, if left untreated, can lead to optic nerve head damage and complete loss of sight. Current interventions include: pharmaceutical drops, laser surgery, shunts, and bleb; however, these methods provide insufficient long-term efficacy in intraocular pressure management. We developed a semi-permanent, implantable transcorneal duct as a new aid in the treatment of this disease. The duct, composed of an intracorneal stabilizing washer and hollow screw, creates an interface between the anterior chamber and the external environment, allowing for the outflow of excess aqueous humor. We discuss the fluid mechanics behind designing and implementing a filter material capable of preventing the ingress of bacteria and viruses while modifying aqueous humor outflow resistances to pre-glaucomatous levels, finding the effective radius of such a material to be 10.44 μm. After performing surgical implantation in four rabbit eyes, subsequent testing showed successful integration between the screw and washer. Colored saline injections highlighted fluid flow progression out of the eye through the duct, suggesting that the devi...
Source: Biomedical Microdevices - Category: Biomedical Engineering Authors: Tags: Biomed Microdevices Source Type: research