. Urinary analysis and diagnosis by microscopical and chemical examination. is examined under the microscope,when the uric-acid crystals will be seen to dissolve readily. If now adrop or two of acetic acid be added, small characteristic crystals willsoon reappear. CRYSTALLINE AND AMORPHOUS SEDIMENTb. 75 2. Sodium Urate.—Sodium urate (see Fig. 24), when present in largeamounts, forms the so-called clay-water sediment, which renders the urineturbid upon cooling. It may be found alone or in combination withuric acid and potassium urate, from which latter it can hardly be distin-guished. Such a se
. Urinary analysis and diagnosis by microscopical and chemical examination. is examined under the microscope,when the uric-acid crystals will be seen to dissolve readily. If now adrop or two of acetic acid be added, small characteristic crystals willsoon reappear. CRYSTALLINE AND AMORPHOUS SEDIMENTb. 75 2. Sodium Urate.—Sodium urate (see Fig. 24), when present in largeamounts, forms the so-called clay-water sediment, which renders the urineturbid upon cooling. It may be found alone or in combination withuric acid and potassium urate, from which latter it can hardly be distin-guished. Such a sediment is the so-called sedimentum lateritium. Sodiumurate usually consists of groups of light or dark brown, fine, amorphousgranules in a moss-like arrangement, which easily adhere to foreign sub-stances as well as to mucus and epithelia. The groups vary greatly insize and are at times quite large. This salt is of common occurrence, and is found in all slight febrilederangements, after mental and physical exertion, in colds, catarrhs of f-w at- # ** »?••# *****. Fig. 24.—Sodium Urate, Amorphous (X 500). the stomach and intestines, on the first day of menstruation, and in gen-eral malaise; and it may also occur in perfectly healthy individualswhere the urine is highly concentrated. It is held in solution while theurine is warm, but quickly becomes precipitated upon cooling. It is theeffete material of oxidation, the so-called materia peccans of old rare cases sodium urate is crystalline (see Fig. 25), appearing inthe form of needle-like clusters or arranged like sheaves of wheat, or of afan-shape arrangement, pointed toward the centre, and broader towardthe periphery. This sediment has been found in various conditions, suchas diseases of the stomach and intestines, and in healthy individuals dur-ing prolonged physical exertion. The accompanying illustration was 7G URINARY ANALYSIS AND DIAGNOSIS. taken from a case of dermoid cyst of the kidney, where the c
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecturine, bookyear1906
