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Published January 2009 | Published
Book Section - Chapter Open

Minimally Invasive Parylene Dual-Valved Flow Drainage Shunt for Glaucoma Implant


A parylene-enabled microvalved shunt implant for glaucoma drainage is presented in this paper. Enabled by the dual-checkvalve operation, this device can physically drain the extra intraocular fluid and regulate the intraocular pressure (IOP) within the normal range (15-20 mmHg). Improved surgical features, in addition to the functional/microfluidic components, such as parylene-tube carrier and anchors, are also incorporated in such device to realize minimally invasive suture-less implantation, suitable for practical in vivo use. With the optimized micromachining and post-fabrication process procedures, the developed implant is the first checkvalved glaucoma drainage device (GDD), which is passive, consumes no additional power, and functions without any circuit involved to pursue its medical application.

Additional Information

© 2009 IEEE. This work was supported by Bausch and Lomb. The authors would also like to thank Mr. Trevor Roper for his valuable fabrication assistance.

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