Renal diseases : a clinical guide to their diagnosis and treatment . considered so, as it has been foundin the urine of women not pregnant. Uric Acid. Uric The correct quantitative estimation of uricacid, acid is a very difficult process, and requiresskilful chemical manipulation, and is unneces-sary for ordinary clinical purpose, and out ofthe question as involving too much time forthe general practitioner. An approximationmay, however, be readily attained by precipi-tation of the acid by hydrochloric or aceticacids in a tall conical glass. The crystals soonform and adhere to the sides of the
Renal diseases : a clinical guide to their diagnosis and treatment . considered so, as it has been foundin the urine of women not pregnant. Uric Acid. Uric The correct quantitative estimation of uricacid, acid is a very difficult process, and requiresskilful chemical manipulation, and is unneces-sary for ordinary clinical purpose, and out ofthe question as involving too much time forthe general practitioner. An approximationmay, however, be readily attained by precipi-tation of the acid by hydrochloric or aceticacids in a tall conical glass. The crystals soonform and adhere to the sides of the glass, andtheir quantity may be rudely estimated bycomparison. For clinical purposes, however,this process is not needed; for whenever uricacid is in excess and constitutes evidence of 1 Kvao-iSj pregnancy. THE URINE. 227 CHEMICALPROPERTY. Uricacid. disorder the crystals are freely deposited orurates are formed in excess. On the cooling of the urine uric acid, whenin excess, will be seen in one or other of itsnumerous crystalline forms—as cubes or quad-Fig. Crystals of uric acid. rants, rhombs or lozenges; hastate, steller orcolumnar, or even barrel-shaped crystals, or inthe form of crystals of oxalate of lime. Occa-sionally the uric acid is passed suspended inthe urine as red sand, like cayenne peppergrains, and settles immediately as a copiousdeppsit of red crystals. Or the uric acid hascombined either with ammonia as a base, orwith soda, forming the constantly occurringdeposit of urates settling as soon as the urinehas lost a few degrees of the temperature ofthe body. These urates are easily recognized 228 THE URINE. CHEMICALPROPERTY. Uric by their complete solubility at a temperatureacid, above 65. Uric acid, as crystalline grains of red sand,is not significant of renal disease. It is theresult either of the metamorphosis of nitro-genous food in excess of the requirements ofnutrition, or it may be derived from the wasteof the tissues, defective oxidation not havingco
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectkidneys, bookyear1870
