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Do urine test strips detect red blood cells and free hemoglobin in urine?

The Urinox dipstick tests are capable of detecting both intact Red Blood Cells (RBCs) as well as free hemoglobin and myoglobin. Intact RBCs break down and react with the test pad and will result in green spots on yellow or orange background. The concentration of green spots is typically linked to the number of RBCs. Free hemoglobin and myoglobin produce a uniform green or green to dark blue color.

If you find green spots on the reagent pad for blood, consult with a physician about your findings and seek a professional diagnosis.

Green spots on a bright yellow background mean intact red blood cells in the urine.

Source: Lillian Mundt, “Graff’s Textbook of Urinalysis and Body Fluids 3rd Edition (2016, Wolters Kluwer)

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