👉 The Hayes fluid, also known as the Hayes-Green fluid, is a colloidal suspension of red blood cells and plasma proteins, first described by John Hayes in 1955. This fluid is primarily composed of deoxygenated hemoglobin, which gives it a distinctive pale yellow color when viewed under a microscope. It is used in hematology to diagnose and monitor various blood disorders, particularly those involving hemolysis or anemia. The fluid's viscosity and the presence of specific proteins can provide valuable insights into the patient's condition, aiding in the differentiation between conditions like sickle cell anemia, thalassemia, and other hemolytic diseases. Its diagnostic utility stems from its ability to reflect the integrity and function of red blood cells in vivo.
