体外衝撃波結石破砕術(ESWL)による腎および周囲組織への影響 : MRIによる観察

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腎結石患者12例に対してYACHIYODA SZIによるESWL前後にMRIを用い腎実質および周囲組織への影響を検討した. 1)12例中6例の患者に術後MRIにて何らかの変化を認め,CMJの消失を2例,腎被膜下出血を2例,腎周囲軟部組織の信号強度の増強を6例に認めた. 2)MRIはESWLによる腎の変化を鋭敏にとらえることができ治療後異常が認められた場合は積極的に検査を行うべきと思われたExtracorporeal shock wave lithotripsy (ESWL) using YACHIYODA SZI was performed on 12 patients with renal stones and the effect on the kidney and adjacent tissue was evaluated by magnetic resonance imaging (MRI) before and after treatment. Some changes were seen in 6 of the 12(50%) patients; perirenal fluid collection in 2 of the 12 (16.7%) patients, subcapsular hematoma in 2 of the 12 (16.7%) patients, renal enlargement in 5 of the 12 (31.3%) patients, increased signal intensity in perirenal tissue in 6 of the 12 (50%) patients, and loss of the corticomedullary junction 2 out of 9 patients (22%). These findings indicated fewer changes in the kidney after ESWL using YACHIYODA SZI than in the other reports. MRI is also concluded to be effective to detect the changes of the kidney after ESWL.