Figure 2 —

Histological findings of parietal peritoneum before (A, B) and after (C, D) treatment with hydrogen-enriched dialysate. (A) Thin membrane covering peritoneum consists mainly of homogeneous or lamellar fibrinous material containing fibroblasts stained with hematoxylin and eosin (HE). Mononuclear cell infiltration is visible in some areas (arrowheads). (B) Fibrinous materials (red or blue with Masson trichrome stain) suggest fibrin or organized fibrin components. (C) Sub-mesothelial connective tissue (compact zone) has become obviously thinner after treatment with H₂ (mean: 190 μm; HE stain). (D) Surface is covered by mesothelial monolayer and fibrinous materials are absent (Masson trichrome stain). 254×366mm (72 × 72 DPI)