American practitioner and news . s. In health calcium oxalate depends on the ingredientsof the ingested food. Oxalate of calcium crystals are frequently foundin diseased conditions—especially in disturbances of the tractus intesti-nalis. Large quantities of calcium oxalate may occur in the urine afteringesting certain vegetables (as beans, carrots, and asparagus). Thequantity of oxalate crystals is no indicator of the amount of oxalic acidin the urine, for the urine may contain considerable oxalic acid with aminimum quantity of precipitated oxalic crystals. Calcium oxalate is-frequently associ
American practitioner and news . s. In health calcium oxalate depends on the ingredientsof the ingested food. Oxalate of calcium crystals are frequently foundin diseased conditions—especially in disturbances of the tractus intesti-nalis. Large quantities of calcium oxalate may occur in the urine afteringesting certain vegetables (as beans, carrots, and asparagus). Thequantity of oxalate crystals is no indicator of the amount of oxalic acidin the urine, for the urine may contain considerable oxalic acid with aminimum quantity of precipitated oxalic crystals. Calcium oxalate is-frequently associated with pathologic changes in the urine. It appearsthat calcium oxalate (CaC204) occurs most abundantly in associationwith urine rich in other forms of excessive urinal secretions or solids. Calcium Oxalate Calculus. 427 Calcium oxalate is held in solution by monophosphate ; it is not solublein the diphosphates. Hence, when uric acid is precipitated from theurine, the acidity of the urine decreases and the monophosphates are. LATE I a. Pig. 9 1 Byron Robinson 1 presents a shadow of nine isolatedchemically pore crystallized salts found in mine (1-9), lyingon a segment of pasteboard box, and d to IX) is the same scries of salts enclosed in gelatine capsules (1-13) x-ray shad-ows of hepatic calculi. Ill and 8, calcinm oxalate. converted into diphosphates CaCO., will crystallize. Calcium oxalate istherefore found in acid urine. Calcium oxalate crystals form after theurine is voided and is hastened by cold. Primary oxalate crystals irri-tate the tractus urinarius. The mechanical irritation may be so trau- 428 The American Practitionkr and News. matic as to produce haemorrhage and catarrh, with accompanyii g paiuand painful micturition. The clinical signification of excess of oxalic acid as oxaluria is in-definite. If oxaluria be not alimentary, it perhaps indicates deviationfrom the usual oxidation, indicating incomplete metabolism of uric acid(H2C5H2N403). Excess of calcium oxa
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