内藤 久美子¹, 速水 恭子¹, 伊藤 祥子², 内藤 晃¹, 仙波 真弓¹, 林 睦雄³, 伊藤 勝陽¹

Kumiko NAITO¹, Kyoko HAYAMIZU¹, Shoko ITO², Akira NAITO¹, Mayumi SENBA¹, Mutsuo HAYASHI³, Katsuhide ITO¹

¹広島大学医学部放射線医学教室, ²吉島病院放射線科, ³たかの橋中央病院泌尿器科

¹Department of Radiology, Hiroshima University School of Medicine, ²Department of Radiologiy, Yoshijima Hospital, ³Department of Urology, Takanobashi Chuo Hospital

キーワード : Extracorporeal shock wave lithotripsy, Renal impairment, Ultrasonography

Renal impairments after extracorporeal shock wave lithotripsy (ESWL) were evaluated ultrasonographically. Twenty-three patients with renal stones were examined by ultrasonography within thirty minutes both before and after ESWL.
In seven cases, perirenal or subcapsular fluid collections were identified. The differences in the transverse diameter and the parenchymal thickness of the treated kidney before and after ESWL were significant, so enlargement of the treated kidney was suspected. In six cases, enlarged and conspicuous renal pyramids were identified, similar to renal allograft rejection or acute tubular necrosis. Histograms of twenty cases indicated increased contrast between renal pyramids and cortexes.
We deduced that these changes reflected damage to renal vesseles and urinary tubules, which took place during ESWL.
In conclusion, ultrasonography is helpful when evaluating renal impairment after ESWL.