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Article
November 7, 1959

MICROSCOPIC HEMATURIA

Author Affiliations

Section of Clinical Pathology Mayo Clinic Rochester, Minn.

JAMA. 1959;171(10):1400. doi:10.1001/jama.1959.03010280124027

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Abstract

To the Editor:—  In the Aug. 15, 1959, issue of The Journal, page 2014, in the Correspondence section, is a statement by Dr. Bruce H. Stewart concerning the number of erythrocytes found in urine and the interpretation of this number. He objects to a widely circulated brochure stating that in centrifuged urinary sediments the normal number of erythrocytes per high-power field varies from 4 to 10. Dr. Stewart concludes "that more than one red blood cell per rare high-power field in a routine centrifuged urinary sediment must be considered abnormal."It is never possible to give quantitative results from a procedure which is not carried out in a manner designed to yield such results. In neither one of these references is any standard procedure set up for determining the number of cells per highpower field. Actually, even the high-power field is not defined. Some persons examine urine with a 5X

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