Prospective multicenter study of suctioning MPCNL with the aid of a patented system in treating renal staghorn calculi

Objective: To investigate the safety and efficacy of suctioning minimally invasive percutaneous nephrolithotomy (MPCNL) with the aid of a patented irrigation clearance system in treating renal staghorn calculi. Methods: From August 2009 to July 2014,4 hospitals had executed prospective multicenter study with a total of 912 cases. The patients were randomly divided into 3 groups: suctioning MPCNL (311 cases); standard percutaneous nephrolithotomy (PCNL, 297 cases); and traditional MPCNL (304 cases). Outcome parameters such as stone free rate, operative time, intrapelvic pressure, and amount of bleeding were compared. Results: Stone free rate by one surgery using single percutaneous tract in the suctioning MPCNL group were significantly higher while blood loss and intrapelvic pressure were significantly less than that of standard PCNL Group. The operative time, stone free rate by one surgery, stone free rate by one surgery using single percutaneous tract, intrapelvic pressure, and amount of bleeding in the suctioning MPCNL group were better than that of traditional MPCNL Group. The postoperative fever rate was higher in the traditional MPNCL group than that of the standard PCNL and suctioning MPCNL groups. Conclusion: Suctioning MPCNL using our patented system is safe, effective and better in treating renal staghorn calculi. Correspondence to: Leming Song, Department of Urology, The Affiliated Ganzhou City people’s Hospital of Nanchang University, 17 Hongqi Avenue, Ganzhou Jiangxi 341000, China, Tel (011-86) –797-8120226, Fax (011-86) –7978112320; E-mail: xdhmd666@hotmail.com