Red blood cells (RBC) can be present in urine even when they are not visible to a person. Also known as hematuria, RBC in urine can indicate an infection, kidney disease, and other health conditions.

Since urine typically does not contain red blood cells, blood in your urine should ... serial labs (hematocrit and hemoglobin ...

the abnormal form of the hemoglobin protein causes the red blood cells to lose oxygen and warp into a sickle shape during periods of high activity. These sickled cells become stuck in small blood ...

Still one other pathway is under scrutiny. Aging red blood cells and cell-free plasma hemoglobin are potent inducers of oxidative stress. Hemoglobin mediates fenton, autooxidation, peroxidase and ...