"EARLY" CALCIUM UROLITHIASIS

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Abstract
It has been shown that conditions in which immobilization of the individual is present, in which portions 01 the urinary tract are paralyzed and in which obstructions and infections of the urinary tract occur, or in which pronounced dehydration is present are likely to lead to calcium urolithiasis. Since the incidence of these conditions has risen decidedly as the result of the war, the importance of this phase of calcium urolithiasis has correspondingly increased, and I believe at the present time this is probably the most common type of urolithiasis.1 The probable mechanisms involved in the formation of the stone in these situations is discussed in a previous article. They involved essentially three factors: infection, stasis and hypercalcinuria. The outstanding fact in the vast majority of such cases is the presence of multiple small precipitates of calcium phosphate in the calices and pelvis of the kidney. These may form