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Published on: August 9, 2024
Possible Intraluminal Obstruction of the XEN45 Gel Stent Observed With Anterior Segment Optical Coherence Tomography
Jaume Rigo1, Marta Castany, Sandra Banderas
1Department of Ophthalmology, Vall d'Hebron University Hospital, Barcelona, Spain.
Purpose:
We herein describe possible intraluminal obstruction because of a hyperreflective material found in anterior segment optical coherence tomography (AS-OCT) in 16 of 46 cases with XEN45 gel stent.
Materials And Methods:
This is a retrospective case series of 46 eyes of 39 patients with noncomplicated XEN45 gel stent surgery, analyzed with AS-OCT and slit-lamp photography after at least 6 postoperative months.
Results:
Possible luminal obstruction in the subconjunctival segment of the implant was observed in 16 eyes of 15 patients, characterized by hyperreflective material on AS-OCT, which was not visible in slit-lamp photography. This was found in 15 eyes following combined procedures and in 1 eye following XEN45 alone. None showed signs of filtering bleb on AS-OCT or slit-lamp photography. In 1 case, the discontinuity between the hyperreflective material and subconjunctival opening of the implant tube was evidenced, and in another case, a focal deposit in the intracameral end of the implant was seen.
Conclusions:
We have successfully described the lumen implant deposit of material as a possible cause of late failure of the implant. AS-OCT allows the identification of such cases and may be useful to plan further postoperative interventions for better patient outcomes.
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