Slit-lamp needle revision of failed filtering blebs using mitomycin C

Area of Science:

• Ophthalmology
• Glaucoma Surgery
• Surgical Innovation

Background:

• Filtration surgery is a common treatment for glaucoma.
• Failure of filtration surgery can lead to elevated intraocular pressure and vision loss.
• Revisional surgical techniques are needed to restore filtration function.

Purpose of the Study:

• To evaluate the efficacy and safety of Mitomycin C (MMC) augmented slit-lamp needle revision for failed filtration surgery.
• To assess the impact of MMC needle revision on intraocular pressure and glaucoma medication requirements.
• To compare the complication profile of MMC needle revision with traditional glaucoma surgeries.

Main Methods:

• Retrospective chart review of 62 patients (62 eyes) who underwent MMC-augmented needle revision for failed filtration surgery.
• Subconjunctival injection of a mixture containing Mitomycin C (MMC), bupivacaine, and epinephrine.
• Needle perforation of subconjunctival fibrotic tissue to re-establish filtration flow, performed 20-30 minutes post-injection.

Main Results:

• Significant reduction in intraocular pressure from 24.1 +/- 6.4 mmHg to 11.5 +/- 4.8 mmHg (P = 5.51 x 10(-21)).
• Marked decrease in the need for antiglaucoma medications from 1.6 +/- 1.0 to 0.3 +/- 0.6 (P = 3.8 x 10(-14)).
• Successful single-needling correlated with white race and prior filtration surgery over 4 years; complications included choroidal detachment, bleb leak, and hyphema.

Conclusions:

• Mitomycin C (MMC) needle revision is a highly effective method for salvaging failed filtration surgery.
• This technique offers a favorable safety profile with complication rates comparable to trabeculectomy augmented with MMC.
• MMC needle revision presents a viable option for restoring filtration and managing glaucoma effectively.