Hemoglobinuria

In medicine, haemoglobinuria is a condition in which the oxygen transport protein haemoglobin is found in abnormally high concentrations in the urine. The condition is often associated with haemolytic anemia, in which red blood cells are destroyed, thereby increasing levels of free plasma haemoglobin. The excess haemoglobin is filtered by the kidneys, which release it into the urine, giving urine a red colour.