Myoglobin (Myoglobin). Myoglobin is a pigment found in muscle tissue. It was mentioned in the section of blood tests. Normally, it is not found in urine . With the destruction of muscles of traumatic origin or with the death of a muscle fiber as a result of a disease, myoglobin accumulates in the vascular bed, and at a certain concentration in the blood it begins to enter the urine, staining the urine black or dark red .
Renal ducts can become clogged with myoglobin, and myoglobin breakdown products damage kidney tissue. Therefore, severe myoglobinuria is fraught with the development of acute renal failure. Increases in serum myoglobin and myoglobinuria are observed in serious systemic muscle diseases, in alcoholic myopathy.