. Urinary analysis and diagnosis by microscopical and chemical examination. laise; 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 h
. Urinary analysis and diagnosis by microscopical and chemical examination. laise; 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 crystals oc-curred in large numbers with uric-acid crystals. Sodium urate frequently undergoes a change a few hours after theurine is voided, the length of time required for the change depending upon. Fig. 25.—Sodium Urate, Crystalline (X 500). the temperature. The granules commence to change into small brownglobules, which are either single or grouped in twos; the latter soon coal-esce and form small dumb-bells, which gradually enlarge (see Fig. 26).This has been spoken of as the first stage of the formation of ammoniumurate, the ammonium urate in statu nascenti, and denotes a commencingtransition of the original acid sediment into an alkaline. When the alka-line change is more or less complete, we have the fully formed globulesof ammonium urate. 3. Calcium Oxalate.—Calcium oxalate, when present in small ormoderate amount in the urine, without an increase of specific gravity,has no clinical significance. Oxalic acid, normally present in all urine insmall quantities, has a special affinity for calcium, and appears in theurine as calcium oxalate. It is frequently found after eating certain kindsof fruits
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecturine, bookyear1906
