Purpose:
to compare the features of hypotensive modality and mechanism of resorption of
the two filtering procedures: non-penetrating deep sclerectomy (NPDS) and
trabeculectomy (TE).
Method:
we evaluated and compared tonographic and UBM-data in eyes with normalized
(IOP< 22 mm Hg) and elevated postop. IOP in 66 eyes underwent NPDS and in 41
eyes after TE.
Results
obviously show that the facility of outflow after NPDS doesn’t exceed
physiological means in comparison with TE. On the other hand, the dimensions of
the bleb have a more pronounced tendency to reduction after NPDS. Statistical
correlation analysis demonstrated high correlation indices between the rate of
postop. hydrodynamics and dimensions of the bleb in NPDS.
Conclusion:
we have stated that the lower rate of fluid distribution after NPDS requested
additional support of filtering bleb (drainage devices or cytostatics) to
prevent rapid healing and to draw the final hypotensive outcome nearer to
traditional TE.