The potentials of the tolerance test with calcium lactate to assess the calcium-regulating hormonal system state during limb lengthening

By making the tolerance hypercalcemic test with calcium lactate the content of ionized calcium, magnesium, chlorides, inorganic phosphates, parathyroid hormone and calcitonin in blood was determined in 25 patients at the age of 8-21 years with congenital shortening of the lower limbs, who were subjected to surgical lengthening of femur or leg. The tolerance test with calcium lactate allowed to assess the state and reactive direction of the osteotropic hormone system before treatment as well as in the process of distraction osteosynthesis and in the long-term period. It was established that in the long-term period returning the functional potentials of the calcium-regulating hormonal system to initial state occurred by 9-18 month after osteosynthesis completion. The systemic index of electrolytes is of the most value in view of the test results.