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Is there in occular inserts used in glaucoma?

Is there in occular inserts used in glaucoma?

Yes, drainage implant (ie, seton/tube/shunt) surgery is an option in treating glaucoma.

Generally, this procedure is performed after multiple attempts at successful trabeculectomy have failed.
A tube is placed in the anterior chamber to shunt aqueous to an equatorial reservoir, and then posteriorly to be absorbed in the subconjunctival space.
Types of implants include Molteno, Baerveldt, Ahmed, and Krupin.

Most shunts function by allowing passive drainage of aqueous from the anterior chamber.
The Molteno implant consists of a silicone drainage tube, which is connected to 1 or 2 acrylic plates that are sutured to the sclera.
The Baerveldt implant is available with larger plates with increased reservoir size. The seton (tube) connected to the reservoir usually is tied off with an absorbable suture, allowing flow to initiate 4-6 weeks postoperative once some conjunctival wound remodeling has taken place, thereby reducing the risk of immediate postoperative hypotony.
The Krupin and Ahmed implants have 1-way valves, which are designed to maintain pressure above 8 mm Hg. These implants may reduce the risk of hypotony, a complication of nonvalved shunts in the early postoperative period.

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