Identifier: essentialsofla00fau (find matches)
Title: Essentials of laboratory diagnosis; designed for students and practitioners
Year: 1915 (1910s)
Authors: Faught, Francis Ashley, 1881-
Subjects: Diagnosis
Publisher: Philadelphia, F. A. Davis company (etc., etc.)
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ers of urine, and can be accomplished in a fewminutes. After centrifugation a part of the supernatant urineis poured off and then, with the aid of a pipette with a smallpoint, a drop or two is drawn up and transferred to a cleanmicroscope slide for examination. The method of employing a conical glass may be used if acentrifuge is not at hand. Sedimentation by this means re-quires a number of hours, and, if care is not taken to prevent TUBE CASTS. 291 bacterial contamination and if the specimen is not kept in a coolplace, the specimen may decompose and the morphologic ele-ments be destroyed. The sedimentation glass is valuable for roughly estimatingthe amount of gross sedimentation in phosphaturia, pyuria, etc.(Fig. 50.) Fig. 48.—Large White Kid-ney. X 350. h, Hyaline cast. g. Spiral cast.w. Waxy cast, f, Fat-granule castwith: n, fat needles. Still finerneedles of this type upon theneighboring fat-granule spherule.k, Fat-granule cell. I, Leukocyte.Vaginal epithelium. t, Fat-droplets.
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Fig. 49.—Chronic Brights Dis-ease (Chronic Parenchym-atous and InterstitialNephritis). X 350. h, g, e, w, Hyaline, granularephithelial, and waxy casts, epRenal epithelium, vep. Quite uniformly fatty renal epithelium. Varieties of Casts.—Hyaline casts are almost transparentand appear as ground glass. They have a delicate but definiteoutline, and are quite friable. Strong illumination of the field may obscure them entirely,as they are very delicate in outline and structure. They are bestseen with the plane side of the reflector, and side illuminationwhich should not be too bright. The particular significance of hyaline casts is not yet posi- 292 THE URINE. tively settled. They occur in advanced grades of nephritis andagain in transient albuminurias, and even in the absence ofdemonstrable albumin; the) are frequently seen during thecourse of fevers, particularly typhoid fever. Granular Casts.—These are more opaque than the hya-line, and are, therefore, more easily seen. The granule

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