Purpose: To study the patterns of vitreous incarceration at sclerotomy sites by ultrasound biomicroscopy (UBM) in patients subjected to valved or nonvalved small gauge pars plana vitrectomy. Methods: A prospective, comparative study of 88 eyes affected by epiretinal membrane and macular hole. Patients were divided into four groups: valved or nonvalved 23-gauge (16 eyes each) and valved or nonvalved 25-gauge (20 eyes each); their vitreal disposition was compared via UBM. Vitreal disposition was also assessed in 16 eyes of 16 patients subjected to valved 27-gauge pars plana vitrectomy. Results: Three vitreal patterns were identified: P0 (vitreous not visible or vitreous strand distant from sclerotomy site), P1 (vitreous strand parallel to and in contact with sclerotomy site), and P2 (vitreous strand entrapped in sclerotomy site).The effect of valved trocar use on vitreous incarceration appeared to be somewhat beneficial, but no statistically significant effect could be shown (OR: 0.85, 95% CI 0.42 - 1.74, p=0.657). Similarly, no differences in vitreous incarceration were shown among vitrectomy gauge (23, 25, or 27) both in a model including valved trocars only (p=0.858) and in a model with all available data (p=0.935). Conclusions: In 23- and 25-gauge macular surgery, postoperative vitreous incarceration does not seem to be reduced by the use of valved cannulas and was similar to that observed in 27-gauge surgery.
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|Titolo:||Vitreous incarceration in sclerotomies after valved 23-, 25-, or 27-gauge and nonvalved 23- or 25-gauge macular surgery|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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