Evaluation of the pelvioureteral function through an impedance urine bolusmetry.

概要

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New equipment based on field gradient principle for measurement of cross sec-tional area of ureteral urine bolus has been developped. Inside the probe consisted of a Fr. 4 ureteral catheter, there are 4 ring impedance electrodes and a bipolar ring ureteromyographic electrode. Ex vivo experinents has proved high values in reliability and reproducebility of obtained cross sectional area of urine bolus through an impedance method. Following results have been obtained through animal and clinical experiments. 1. As urine bolus passed through the impedance electrodes, impedance represent-ed the cross sectional area of urine bolus., 2. The ureteral activity corresponded to the increase of urine flow changed as follows, (a) ureteral peristaltic frequency increased, (b) cross sectional area of urine bolus increased, (c) length of urine bolus increased, (d) during maximum diuresis, peristaltic activity diminished and continous flow presented through ureteral column., 3. It will be useful method for experimental or clinical evaluation of ureteral function.
日本平滑筋学会の論文