Research for extracellular water ratio and phase angle of transforaminal epidural block and lumbar epidural steroid injection.

We was able to confirm that bioelectrical impedance analysis might be a useful tool to evaluate body condition before and after pain procedure. Especially we found lumbar epidural steroid injection influenced extracellular body water ratio and phase angle on lower extremities by modulation of sympathetic system. Thus, edema on lower extremities was reduced and cellular integrity was improved. From now on, it is time for us to consider how to use BIA in pain treatment.