Examination of the urine; a manual for students and practitioners . oon aspossible after the urine has been voided. On standing,decomposition and fermentation take place, which alterthe microscopic picture materially. The most importantchange which occurs in urine on standing, however, is thedisintegration of casts, epithelia, etc. A specimen of urineshould never be violently shaken, as this also contributesto the breaking up of casts and other delicate structures. METHODS OF OBTAINING SEDIMENTS By Gravity.—This consists simply in placing the urinein a suitable glass, covering with a glass pla
Examination of the urine; a manual for students and practitioners . oon aspossible after the urine has been voided. On standing,decomposition and fermentation take place, which alterthe microscopic picture materially. The most importantchange which occurs in urine on standing, however, is thedisintegration of casts, epithelia, etc. A specimen of urineshould never be violently shaken, as this also contributesto the breaking up of casts and other delicate structures. METHODS OF OBTAINING SEDIMENTS By Gravity.—This consists simply in placing the urinein a suitable glass, covering with a glass plate in order tokeep out dust and foreign matter, and allowing to stand,preferably in a dark cool place, for about twelve hours. 235 236 EXAMINATION OF THE URINE The edges of the glass should be ground flat and the covershould be made of ground glass. The time required for the urine to settle is a seriousobjection to this method, and the decomposition whichthe urine undergoes on standing so long renders it unfitfor microscopic examination. Casts may become disin-. Fig. 31.—Urine or sedimentglass.
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Keywords: ., bookcentury1900, bookdecade1900, bookidexaminat, booksubjecturine
