Clinical Trial: A Multicenter Prospective Research on the Treatment of Low Pole Renal Calculus by Flexible Ureteroscope

Study Status: Not yet recruiting
Recruit Status: Not yet recruiting
Study Type: Observational

Official Title: A Multicenter Prospective Research on the Treatment of Low Pole Renal Calculus by Flexible Ureteroscope

Brief Summary: This study centers on the treatment of low pole renal stones by flexible ureteroscope and intends to find the key anatomical parameters using a prospective, randomized multi-center trial design and to make a more appropriate standard for flexible ureteroscopy of low pole renal stones.

Detailed Summary: With the development of manufacturing technique, new generation of flexible ureteroscopes have great initiative and passive bending capacity and have greatly expanded its application. In our clinical practice, we have found that IPA (Infundibulopelvic angle) is no longer a decisive factor for the success of f-URS（flexible ureteroscope） surgeries. Thus, we think it is necessary to have further study on the effect of anatomy of renal collecting system for f-URS surgeries.
Sponsor: Changhai Hospital

Current Primary Outcome: whether the f-URS could enter the low kidney calyx or not [ Time Frame: during the operation ]

Following conditions are regarded as failures: 1. the f-URS couldn't enter the low kidney calyx 2. Though the f-URS has entered the low kidney calyx, it cannot crush the stone.


Original Primary Outcome: Same as current

Current Secondary Outcome: stone clearance [ Time Frame: 4 weeks post-operatively ]

Check NECT（nonenhanced CT）, no residual or residual stones are smaller than 2mm in total refers to clear success.Number of participants undergo f-URS surgeries without residual calculus/Total number of participants in each group *100%=stone clearance


Original Secondary Outcome: Same as current

Information By: Changhai Hospital

Dates:
Date Received: April 2, 2017
Date Started: March 2017
Date Completion: December 2017
Last Updated: April 2, 2017
Last Verified: April 2017