98th Annual Meeting DOG 2000

P 794

Influence of a retinotomy on intraocular pressure after pars plana vitrectomy and silicone oil injection

A. Weber, S. Pavlovic, O. Walter, F. Weinand, K. W. Jacobi

Recent studies have shown an influence of a retinotomy on intraocular pressure (IOP).

The aim of this study is to find out the influence of a retinotomy of more than 90° on IOP in eyes with pars plana vitrectomy (PPV) and silicone oil injection. We compared the IOP before and after operation as well as before and after silicone oil removal.

Methods: A total of 145 eyes operated between 12/93 and 7/98 with PPV and silicone oil injection were retrospectively evaluated. We compared eyes with a retinotomy less than 90° (group A) with those with a retinotomy of more than 90° (Group B). The follow up was at least 6 month.

Results: Preoperatively mean IOP was 13,3 mmHg in group A and 8,6 mmHg in group B.

One week after operation mean IOP was 16,9 mmHg in group A and 15,5 mmHg in group B.

In 85 patients silicone oil removal has been performed so far. Immediately preoperatively mean IOP was 15,7 mmHg (group A) and 18,0 mm Hg in group B. At the time of the final postoperative examination mean IOP was 15,6 mmHg in group A and 15,1 mmHg in group B.

In 8 eyes of group A (9,3%) and 22 eyes of group B (37,3%) antiglaucomatous operations had to be performed.

Conclusion: Retinotomy during PPV with silicone oil injection does not lower IOP neither during silicone oil tamponade nor after silicone oil removal.

Department of Opthalmology, Friedrichstr. 18, D-35385 Gießen



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