David H Ren, 618041 Laurel Hill Dr, Shreveport, LA 71115

2003023, Dec 25, 2003

Jun 25, 2002

10/183781

David Ren - Dallas TX, US

A61M005/00
A61F009/00

604/008000, 606/107000

A “cross-shaped” tubular structure shunts aqueous humor from the anterior chamber of the eye to control intraocular pressure (IOP) associated with glaucoma. A first tube implanted in the anterior chamber of the eye has an end covered with a thin membrane having a small hole in the center which can be enlarged by using an ophthalmic laser. A second tube is interconnected with the first tube at a right angle to form a single T-shaped shunt with the second tube implanted in the lumen of Schlemm's Canal. A third tube, with a porous end plate, is implanted into the subconjunctival-tenon space and is connected to the first and second tubes to form the “cross-shaped” double shunt. The end plate has small pores that control the rate of aqueous humor outflow. The first T-shaped shunt can be used as an independent single-shunting device by omitting the addition of the third tube.