Weber U.

Augeklinik des Städtischen Klinikums Braunschweig

Background: In Er:YAG Laser pars plana vitrectomy (L-ppV) ´total energy´ consumption, count of laser pulses, and application time are documented.
Purpose: Quantification of vitreous pathologies in differnent vitreoretinal disorders by use of energy consumtion in l-ppv. Material and methods: Grouping of 82 consecutive l-ppvs according to their clinical diagnoses (retinal detachments with PVR 26, PDR 23, epiretinal fibrosis 12, AMD with vitreous involvement 8, CRVO with vitreous involvement 7, vitreous bleeding of unknown origin 6), and correlation with the averaged energy consumption of the L-ppV. The operations were performed by one surgeon using an Er:YAG Laser (Asclepion, Jena, Germany) in combination with a Megatron (Geuder, Heidelberg, Germany) an an EIBOS (Möller, Wedel, Germany). For statistics the Welch- und t-Tests were used.
Results: ´Total energy´: Vitreous bleeding of unknown origin 489,6 J, PDR 341,4 J, PVR-detachments 293,6 J, CRVO 261,3 J, AMD 248,3 J, and epiretinal fibrosis 162,4 J. Statistically significant differences between the diagnostic groups were found between vitreous bleedings of unknown origin and the other groups as well as between epiretinal fibrosis and the other groups except for AMD.
Conclusions: Althought there are some variabilities in the clinical appearances and in spite of the relative small number of cases, a quantification of vitreous pathology should be possible with the `total energy´ measurement.

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