. Urinary analysis and diagnosis by microscopical and chemical examination. Ftg. 65.—Hyaline Casts (X 500). Upper row, from convoluted tubules; middle row, from narrow tubules; lowest row, from straight collecting tubules. tion is noticeable in them, though this is not sufficiently marked to allowof their classification as granular casts. Different formations, such as pus-corpuscles and fat-globules, may be seen upon them in small numbers,but are accidental and do not change the diagnosis. In rare cases thesecasts may appear more solid and of higher refraction, though their hya- 136 URINARY AN
. Urinary analysis and diagnosis by microscopical and chemical examination. Ftg. 65.—Hyaline Casts (X 500). Upper row, from convoluted tubules; middle row, from narrow tubules; lowest row, from straight collecting tubules. tion is noticeable in them, though this is not sufficiently marked to allowof their classification as granular casts. Different formations, such as pus-corpuscles and fat-globules, may be seen upon them in small numbers,but are accidental and do not change the diagnosis. In rare cases thesecasts may appear more solid and of higher refraction, though their hya- 136 URINARY ANALYSIS AND DIAGNOSIS. line character is undoubted, and they must not be mistaken for waxycasts. When very delicate and pale, it has been advised to color the casts bythe addition of a drop of iodine-iodide of potash solution (iodine, 1 part;iodide of potash, 2 parts; water, 300 parts) upon the slide, which willstain them yellow and render them more distinct. This is rarely neces-. Fig. 66.—Epithelial Casts (X 500). Upper row, from convoluted tubules; middle row, from narrow tubules; lowest row, from straight collecting tubules. sary, since a sharp focus, perhaps with the light somewhat shaded, willbring them into view quite clearly. In a highly alkaline urine they areindistinct, and after a time seem to become lost completely. 2. Epithelial Casts (see Fig. 66).—True epithelial casts are hyaline TUBULAR CASTS. 137 casts studded with epithelia. The desquamated epithelial tubes whichare sometimes found in the urine, and represent solid masses of epitheliaof varying length in the form of casts thrown off from the tubules, canhardly be called true casts, although they are usually classified as such. Epithelial casts, when present, always denote an acute process; andthe more pronounced it is, the larger is the number of these casts. Theyvary in size according to their origin, but are never as long as some hya-line casts and are usually quite regular. They are of
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecturine, bookyear1906
