A letter on the differences in the structure of calculi, which arise from their being formed in different parts of the urinary passages; and on the effects that are produced upon them by the internal use of solvent medicines / from William Brande to Everard Home.

  • Brande, William Thomas, 1788-1866
Date:
1808
Catalogue details

Licence: Public Domain Mark

Credit: A letter on the differences in the structure of calculi, which arise from their being formed in different parts of the urinary passages; and on the effects that are produced upon them by the internal use of solvent medicines / from William Brande to Everard Home. Source: Wellcome Collection.

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    extremely small and hard, having an appearance of being made up of several smaller calculi, of a dark brown colour. The third is of the size of a small pea, its surface smooth, and of a gray colour, and not very hard. SECTION II. Of Calculi which have been retained in the Kidney. When one or more of the calculi described in the preced¬ ing section are detained,in the infundibula or pelvis of the kidney, it frequently happens that they increase in that situa¬ tion to a considerable size. This increase is of two kinds. 1. Where there is a great disposition to the formation of uric acid, the calculus consists wholly of that substance and animal matter, so as frequently to form a complete cast of the pelvis of the kidney. 2. Where there is less disposition to form uric acid, the external laminae are composed of the ammoniaco-magnesian phosphate, and phosphate of lime. In one instance, a small uric calculus had been deposited in the kidney, in such a situation that its upper surface was exposed to a continual stream of urine, upon which beautiful crystals of the triple phosphate had been deposited. It would therefore seem, that under common circumstances, a stream of urine passing over a calculus of uric acid, has a tendency to deposit the phosphate upon it.