Donor scleral patch for treating hypotony due to leaking and/or overfiltering blebs

Area of Science:

• Ophthalmology
• Glaucoma Surgery
• Surgical Techniques

Background:

• Aqueous leaks following glaucoma surgery can compromise intraocular pressure (IOP) control.
• Scleral melting presents a challenge for effective bleb revision and leak closure.
• Traditional suturing methods may be ineffective when the scleral bed is macerated.

Purpose of the Study:

• To describe a modified bleb revision technique utilizing a donor scleral patch.
• To evaluate the efficacy of this technique in managing aqueous leaks due to scleral melting.
• To assess the impact on intraocular pressure and visual acuity.

Main Methods:

• Retrospective review of 15 patients undergoing bleb revision with a donor scleral graft (1997-2003).
• Surgical technique involves tight adaptation of the scleral patch with loose posterior edge suturing.
• Data collected included demographics, visual acuity, and IOP at multiple follow-up intervals.

Main Results:

• The procedure was performed on 15 patients with a mean follow-up of 22 months.
• Mean preoperative visual acuity improved from 20/50 to 20/30.
• Mean intraocular pressure decreased significantly, with postoperative IOP of 14.1 +/- 3.3 mm Hg.

Conclusions:

• The donor scleral patch technique is recommended for bleb revisions with macerated scleral beds.
• Loose posterior suturing of the patch effectively prevents postoperative intraocular pressure spikes.
• This modified technique offers a viable solution for managing challenging aqueous leaks.