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Intraocular pressure changes and pain scores within 24 hours and short-term outcomes after micropulse transscleral
Nattanan Phanvichatkul1, Pukkapol Suvannachart1,2
1Department of Ophthalmology, Suddhavej Hospital, Mahasarakham University, Mahasarakham, Thailand.
Purpose:
To assess intraocular pressure (IOP) changes and pain scores during 24 hours and short-term outcomes after micropulse transscleral laser therapy (MP-TLT).
Design:
Retrospective case series.
Methods:
We reviewed eyes undergoing MP-TLT (2,000 mW; 31.3% duty cycle; 100-200 seconds) with serial IOP measurements during the first operative day, excluding those with prior cyclophotocoagulation or combined procedures. IOP and pain scores (numerical rating scale, NRS) were recorded at 1, 5, 9, 13 hours, and the following day post-procedure. Data from follow-up visits were obtained to evaluate success rates (≥30% IOP reduction or an IOP 6-18 mmHg). Mixed-effects regression and Kaplan-Meier method were used for analysis.
Results:
This study examines 46 eyes from 40 patients, 58.7% with secondary glaucoma. The mean preoperative IOP was 40.6 mmHg. The NRS was 2.3 at the end of the procedure. The mean postoperative IOP (% reduction) and NRS values were 33.9 (16.5) mmHg and 2.4 at 1 hour, 36.1 (11.1) mmHg and 2.8 at 5 hours, 32.6 (19.7) mmHg and 1.7 at 9 hours, 29.7 mmHg (26.8) and 1.2 at 13 hours, and 24.5 (39.7) mmHg and 1.0 on the following day. The IOPs were significantly lower at all time points (p < 0.05), with the lowest mean value of 16.4 mmHg at week 1. The success rate was 80.6% at 12 months. One patient developed transient hypotony maculopathy.
Conclusions:
MP-TLT resulted in a significant IOP reduction within 24 hours, with maximal effect at 1 week, and demonstrated favorable short-term outcomes.
Insights
Micropulse transscleral laser therapy (MP-TLT) significantly reduces intraocular pressure (IOP) within 24 hours, with the best results seen at one week. This glaucoma treatment shows favorable short-term outcomes and a high success rate.
Area of Science:
- Ophthalmology
- Glaucoma Management
- Laser Therapy
Background:
- Glaucoma is a leading cause of irreversible blindness worldwide.
- Elevated intraocular pressure (IOP) is a primary risk factor for glaucoma progression.
- Effective IOP reduction strategies are crucial for preserving vision.
Purpose of the Study:
- To evaluate the efficacy of micropulse transscleral laser therapy (MP-TLT) in reducing intraocular pressure (IOP).
- To assess pain scores and short-term outcomes following MP-TLT.
- To analyze IOP changes over a 24-hour period and up to one week post-procedure.
Main Methods:
- A retrospective case series design was employed.
- MP-TLT was performed on 46 eyes of 40 patients, excluding those with prior cyclophotocoagulation or combined procedures.
- Intraocular pressure (IOP) and pain scores (NRS) were recorded serially up to 24 hours and at follow-up visits. Success was defined as ≥30% IOP reduction or IOP between 6-18 mmHg.
Main Results:
- Mean preoperative IOP was 40.6 mmHg, with a mean postoperative IOP of 24.5 mmHg (39.7% reduction) by the following day.
- Significant IOP reduction was observed at all measured time points (p < 0.05).
- The mean IOP reached 16.4 mmHg at week 1, with an 80.6% success rate at 12 months. Pain scores remained low throughout.
Conclusions:
- Micropulse transscleral laser therapy (MP-TLT) effectively reduces intraocular pressure (IOP) within 24 hours.
- The maximal IOP-lowering effect of MP-TLT is observed by one week post-procedure.
- MP-TLT demonstrates favorable short-term outcomes and a high success rate in glaucoma management.
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