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SEDIMENTATION CYTOLOGY IN URINE BY A NEWLY DEVISED SIMPLE APPARATUS

“Sedimentation Method” has been used in our institute to detect a small number of abnormal cells in the CSF of leukemic patients without cell distortion. This technique has been applied for urinary cytology in patients with UTI and urinarytract malignancy.The Nishimura's fluid sedimentation chamber, a newly devised simple apparatus, consists of an open-ended plastic tube, an absorbent paper with a central hole, and a glass slide. These are stuck to each other with double-sided plastic adhesive tape with a central hole of equal size. Only o,2ml of fresh urine is needed to obtain enough cellular elements sedimented onto the glass in 20minutes. The details of white blood cells and other sediments can be seen by Wright stain.One lymphoma patient with renal involvement showed lymphoma cells in urine by this technique in the early stage. The differentials of urinary white blood cells in patients with cystitis and pyelonephritis showed no disease specific pattern. Our sedimentation technique is very simple, inexpensive and reliable method for urine cytology.