👉 Oxyhemoglobin is a substance that is present in the blood of people with sickle cell anemia, which is caused by mutations in the hemoglobin gene. It helps to transport oxygen from the lungs to the body's tissues and organs, but it can also cause blockages in the arteries that carry oxygenated blood to the heart muscle. In a healthy person, oxyhemoglobin levels are relatively low, as they help to reduce the risk of hypoxia (low oxygen levels) in