A Randomized Study of Minimally Invasive Percutaneous Nephrolithotomy (MPCNL) with the aid of a patented suctioning sheath in the treatment of renal calculus complicated by pyonephrosis by one surgery.

Background: Calculus pyonephrosis is difficult to manage. The aim of this study is to explore the value of a patented suctioning sheath assisted minimally invasive percutaneous nephrolithotomy (MPCNL) in the treatment of calculus pyonephrosis.

Methods: One hundred and eighty two patients with calculus pyonephrosis were randomizely divided into observation group (n = 91) and control group (n = 91).

Animal Experimental Study to Test Application of Intelligent Pressure Control Device in Monitoring and Control of Renal Pelvic Pressure During Flexible Ureteroscopy.

Objective: To investigate the application of intelligent pressure control devices (medical irrigation and suctioning platform with pressure feedback function, and suctioning ureteral access sheath with pressure-measuring function) in flexible ureteroscopy for monitoring and control of renal pelvic pressure.

Materials And Methods: Nine pigs with a total of 18 kidneys were randomly divided into 3 groups according to varied renal perfusion flow rates: group A, 50 mL/min; group B, 100 mL/min; and group C, 150 mL/min. A ureteral catheter connected to an invasive blood pressure monitor was retrogradely placed to the upper renal calyx to measure upper calyceal pressure; the suctioning sheath was connected to a 3-channel tubing and was connected to an invasive blood pressure monitor; and the platform and renal pelvic outlet pressure was measured.

A comparison of supracostal and infracostal access approaches in treating renal and upper ureteral stones using MPCNL with the aid of a patented system.

Background: There are still disagreements on which is a better approach to choose to establish percutaneous tract for percutaneous nephrolitotomy (PCNL), between supracostal and infracostal approaches. The aim of this study is to investigate the safety, efficacy and practicability of minimally invasive PCNL (MPCNL) with the aid of a patented system either through supracostal or through infracostal access.

Methods: A retrospective study was carried out for 83 patients with renal or upper ureteral stones.

Comparative study of outcome in treating upper ureteral impacted stones using minimally invasive percutaneous nephrolithotomy with aid of patented system or transurethral ureteroscopy.

Objective: To determine an efficient method for treating upper ureteral impacted stones, we compared the outcome of minimally invasive percutaneous nephrolithotomy with the aid of our patented system and transurethral ureteroscopy.

Materials And Methods: A total of 182 patients with complicated impacted upper ureteral stones above the level of L4 were randomly divided into 2 groups. Group 1 included 91 patients who were treated with minimally invasive percutaneous nephrolithotomy with the aid of a patented system.

The application of a patented system to minimally invasive percutaneous nephrolithotomy.

Purpose: To investigate the clinical effect of minimally invasive percutaneous nephrolithotomy (MPCNL) using a patented irrigation and clearance system.

Patients And Methods: From August 2008 to August 2009, 60 patients with renal stones ≥2.0 cm were randomly assigned to two groups.