This formula is not exact: It assumes the current density is totally uniform in the conductor, which is not always true in practical situations. However, this formula still provides a good approximation for long thin conductors such as wires.
Deferasirox is used in the treatment of transfusional iron overload in people with thalassemia. Chelation therapy is used as a treatment for metal poisoning, including acute mercury, iron (including in cases of thalassemia), arsenic, lead, uranium, plutonium and other forms of toxic metal poisoning.
How is an elevated blood lead level in an adult treated? For adults with very high levels of lead in the blood, lead may be removed by a treatment called chelation. Chelation therapy can have adverse effects, and clinicians should not begin treatment for lead toxicity without consulting a medical toxicologist.