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従来筆者らが用いていた切除鏡システムのシース(外筒)は24Fr以上であり,挿入や操作に際して尿道の抵抗が強いことも多いため,1998年6月より18Frの細径シース,17Fr相当のループおよび9Frの内視鏡を用いて経尿道的前立腺切除術(TUR-P)および膀胱腫瘍切除術(TUR-Bt)を施行した。TUR-Pは21例に施行し,切除片は小さく,灌流液の流入も少なかったが,尿道からの擦過出血や術後狭窄を軽減することができた。TUR-Btは7例に行ったが,筋層浸潤している膀胱腫瘍のデリケートな切除も可能で,今後有用なシステムと思われた。
The size of resectoscope sheath usually used for transure-thral resection of prostate (TUR-P) or bladder tumor (TUR-Bt) is 24 French (Fr) or larger. However, we considered this size too large for most Japanese urethra, and we started to use smaller sized-resectoscope systems in June 1998. We performed 21 TUR-P. The tips were small, the irrigant volume was limited, and the telescopic field was also limited. However urethral resistance at inser-tion and during manipulation was decreased. In 3 TUR-Bt cases, with the small tips, we could resect the tumor more delicately especially in the muscle layer.
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