Spherocytes are osmotically fragile cells that rupture more easily in a hypotonic solution than do normal RBCs. Because they have a low surface area:volume ratio, they lyse at a higher osmolarity than do normal discocyte (RBCs). Cells that have a larger surface area:volume ratio, such as target cells or hypochromic cells are more resistant to lysing. After incubation, an increase in hemolysis is seen in spherocytes. Hereditary spherocytosis typically has greater number of spherocytes than other causes of spherocytosis. Therefore, the degree of lysis is usually more pronounced, but this is not always the case. Some rare disorders can also cause marked fragility and hereditary spherocytosis cases can display moderate fragility.
No special preparation is needed for OF. Inform your doctor if you are on any medications or have any underlying medical conditions or allergies before undergoing OF. Your doctor depending on your condition will give specific instructions.
|UNISEX||All age groups||Osmotic fragility is increased in case of Sperocytosis, decreased in Thalassemia|