This study focussed on elucidating difference of blood PTH levels, by employing the various kinds of PTH kits. We carried out the measurements of PTH levels in sera of the hemodialysis patients with renal insufficiency presumably inac-tivated PTH degradative regulation in kidney. Our results showed the remarkable significant relationships among blood PTH levels of carboxyl and mid-region PTH and intact PTH in hemodialysis patients and was deduced that the differenee of PTH levels by using various kinds of PTH kits was responsible of PTH cleavage effect in the kidney.
