Outcomes for Ab Interno Bleb Revision With a Novel Translimbal Sclerostomy Spatula.
Grover Davinder S, Fellman Ronald L
AI Summary
This study found a novel ab interno bleb revision technique with a specialized spatula effectively lowered IOP and medication use in failed filtration surgeries, potentially reducing the need for more invasive glaucoma procedures.
Abstract
Purpose
To report outcomes for a novel ab interno bleb revision technique and spatula.
Patients and methods: This is a retrospective chart review.
Results
A total of 21 eyes of 21 patients underwent ab interno bleb revision with the Grover-Fellman biplanar sclerostomy spatula. Mitomycin C was given at least 1 week preoperation. The mean age of the patients and blebs were 67 and 6.75 years, respectively. The mean follow-up is 10.6 months (range: 3 to 17 mo). Mean preoperative intraocular pressure (IOP) (SD) was 21.9 (9.1) mm Hg on 3.7 (1.2) glaucoma medications. At 12 months follow-up, the mean IOP was 12.1 mm Hg on 0.86 medications. Four eyes failed due to uncontrolled IOP needing a tube shunt. One eye failed due to uncontrolled IOP but was lost to follow-up before a tube shunt could be performed. All failures occurred within 3 months. Two eyes had an IOP of <5 mm Hg after 1 month with no evidence of hypotony maculopathy. These cases resolved after 3 months without surgical intervention. All successful cases had blebs that were low, diffuse, and posterior.
Conclusions
After a failed filtration surgery, a low-diffuse bleb was reestablished by pretreating with subconjunctival mitomycin C followed by ab interno bleb revision with the Grover-Fellman biplanar sclerostomy spatula, decreasing further more invasive glaucoma procedures.
MeSH Terms
Shields Classification
Key Concepts5
Ab interno bleb revision with the Grover-Fellman biplanar sclerostomy spatula, preceded by subconjunctival mitomycin C at least 1 week preoperation, resulted in a mean intraocular pressure (IOP) of 12.1 mm Hg on 0.86 medications at 12 months follow-up, compared to a mean preoperative IOP of 21.9 (9.1) mm Hg on 3.7 (1.2) glaucoma medications.
After ab interno bleb revision with the Grover-Fellman biplanar sclerostomy spatula, 4 out of 21 eyes (19%) failed due to uncontrolled IOP needing a tube shunt, and one eye failed due to uncontrolled IOP but was lost to follow-up before a tube shunt could be performed; all failures occurred within 3 months.
Two eyes (9.5%) had an IOP of <5 mm Hg after 1 month following ab interno bleb revision with the Grover-Fellman biplanar sclerostomy spatula, with no evidence of hypotony maculopathy; these cases resolved after 3 months without surgical intervention.
All successful cases of ab interno bleb revision with the Grover-Fellman biplanar sclerostomy spatula had blebs that were low, diffuse, and posterior.
The ab interno bleb revision with the Grover-Fellman biplanar sclerostomy spatula, after pretreating with subconjunctival mitomycin C, reestablished a low-diffuse bleb after a failed filtration surgery, decreasing further more invasive glaucoma procedures.
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