英语语法分析

Results Resection of the affected ureter and ureteroplasty were undertaken for 2 patients. Ureteronephrectomy was performed for 1 patient because of serious hydronephrosis due to obstruction.

结果2例行病变输尿管切除及输尿管成形术，1例行输尿管镜电灼术，1例因梗阻致肾严重积水而行肾输尿管切除术。