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Removing, reinserting aqueous drainage device can resolve device-related complications

J Glaucoma. 2009;18(6):484-487.

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Simultaneous removal and replacement of an aqueous drainage device can result in resolution of complications related to the device and maintain IOP, a study found.

"In patients who require removal of Ahmed [aqueous drainage devices] due to complications, removal of the offending [aqueous drainage device] and replacement in another quadrant is effective in both resolving the complications and maintaining IOP control," the study authors said.

The retrospective case series looked at six patients out of 272 who had the Ahmed glaucoma valve device (New World Medical) implanted and then removed due to device-related complications. All six cases had the device placed in a separate quadrant at the same surgical procedure.

Mean preoperative IOP was 16 mm Hg, and at final follow-up, in a range of 13 to 52 months, 11 mm Hg. Medications were reduced postoperatively, the researchers said.

Postop, one patient had hypotony and reduced vision, and one patient had a second valve implanted because of uncontrolled IOP. No other significant complications were reported.