Endopyelotomy using bent electrotome during minimally percutaneous nephrostomy for the treatment of uerteropelvic junction obstruction

Objective:To investigate the technique and effectiveness of endopyelotomy with bent electrotome during minimally percutaneous nephrostomy (mini-PCN) in treating uerteropelvic junction obstruction (UPJO).Methods:We reviewed the data of 15 cases with primary or secondary UPJO that were treated with mini invasive PCN under the guidance of C-arm fluoroscopy. Endopyelotomy were performed on all the patients by using an antegrade approach with the bent F2 electrotome.Results:A total of 15 cases were operated on successfully.The symptom was relieved postoperatively, and no severe bleeding and perinephric abscess were observed. By the first and third postoperative month, B-ultrasonography and intravenous pyelography were carried out, which demonstrated that the previous hydronephrosis had reduced or disappeared and uerteropelvic junction was unobstructed. Six months after surgery, only 2 cases recurred and were transferred to open surgery.Conclusions:Endopyelotomy by bent electrotome during mini-PCN for the treatment of UPJO is a simple and efficient method, with advantages of mini-invasion, rapid recovery and low cost.