A New Method of Urinary Stone Analysis by Batik Histochemical Staining of thin Sections

Abstract

Thin sections of urinary calculi are prepared by petrographic methods using Araldite of the mounting medium. By covering the remaining put of the don with wax, an exposed segment of the section is stained by a histochemical technique. By the process of dewaxing ad rewaxing, successive adjacent segments are stained by GBHA, Von Kossa, schultz, and titan yellow methods for calcium oxalate, apatite, uric acid and urates, and magnesium in magnesium ammonium phosphate, respectively. If desired, matrix in additional segments is stained with PAS and aqueous toluidine blue. Microscopic examination of each layer through all the stained segments of a stone section reveals its chemical nature. Thus the chemical composition, morphology, and spatial distribution of the crystalline and matrix constituents of thin sections of urinary calculi are simultaneously revealed in situ.