Hematuria definition

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:  Adnan Ezici, M.D[2] Venkata Sivakrishna Kumar Pulivarthi M.B.B.S [3]

## Overview

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Hematuria is defined as the presence of red blood cells (RBCs) in the urine. Gross hematuria and microscopic hematuria( MH) are 2 types of hematuria. One of the most widely used definitions of microhematuria is the presence of at least two or three red blood cells per high power-field on a properly collected urinary specimen (confirmation should be done with 2 or 3 urinalyses) in the absence of an obvious benign cause (e.g. mild trauma or sexual activity preceding the collection).

## Definition

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Hematuria is defined as the presence of blood in the urine. Gross hematuria and microscopic hematuria( MH) are 2 types of hematuria .[1] Definitions for MH vary considerably and range between 1 to 10 red blood cells per high-power microscope field. [2] This difference is due to factors affecting related to sample collection and quantification. One of the most widely used definitions of MH is the presence of at least two or three red blood cells per high power-field on a properly collected urinary specimen (confirmation should be done with 2 or 3 urinalyses taken consecutively) in the absence of an obvious benign cause (e.g. mild trauma or sexual activity preceding the collection).[3][4]

## References

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1. ↑ "Hematuria: American Urological Association".
2. ↑ Cohen RA, Brown RS (2003) Clinical practice. Microscopic hematuria. N Engl J Med 348 (23):2330-8. DOI:10.1056/NEJMcp012694 PMID: 12788998
3. ↑ Ingelfinger JR (July 2021). "Hematuria in Adults". N Engl J Med. 385 (2): 153–163. doi:10.1056/NEJMra1604481. PMID 34233098 Check `|pmid=` value (help).
4. ↑ Davis R, Jones JS, Barocas DA, Castle EP, Lang EK, Leveillee RJ et al. (2012) Diagnosis, evaluation and follow-up of asymptomatic microhematuria (AMH) in adults: AUA guideline. J Urol 188 (6 Suppl):2473-81. DOI:10.1016/j.juro.2012.09.078 PMID: 23098784