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Late argon laser suture lysis after mitomycin C trabeculectomy
K S Pappa1, R J Derick, P A Weber
1Department of Ophthalmology, Ohio State University, Columbus 43210.
Ophthalmology
|August 1, 1993
Summary
Late argon laser suture lysis effectively reduced intraocular pressure (IOP) in high-risk patients after mitomycin C trabeculectomy. Mitomycin C appears to extend the therapeutic window for laser suture lysis, delaying wound healing.
Area of Science:
- Ophthalmology
- Glaucoma Surgery
- Surgical Adjuncts
Background:
- Argon laser suture lysis is a standard early post-operative procedure to enhance filtration after trabeculectomy.
- Its efficacy is typically limited to the first two weeks post-surgery.
- Mitomycin C (MMC) is an adjunct therapy that improves trabeculectomy success rates in high-risk patients and may alter the timing of effective suture lysis.
Observation:
- This study investigated the efficacy of late laser suture lysis in five high-risk patients who had previously undergone mitomycin C trabeculectomy.
- Laser suture lysis was performed at a mean of 13 weeks (range: 7-21 weeks) post-surgery.
- The mean patient age was 66.8 years.
Findings:
- The mean intraocular pressure (IOP) before late laser suture lysis was 20.2 mmHg.
- Immediately following lysis, IOP decreased by an average of 11.4 mmHg.
- At 3-4 months post-lysis, the mean IOP was sustained at 9.4 mmHg.
Implications:
- Adjunctive mitomycin C therapy appears to significantly delay wound healing after trabeculectomy.
- This delay extends the clinical effectiveness of argon laser suture lysis beyond the traditional early post-operative period.
- Late laser suture lysis may be a viable option for IOP management in select high-risk patients treated with mitomycin C.