Effectiveness of ureteroscopy-assisted retrograde nephrostomy (UARN) for percutaneous nephrolithotomy (PCNL).
Takashi Kawahara, Hiroki Ito, Hideyuki Terao...
https://pubmed.ncbi.nlm.nih.gov/23251698/Actively Recruiting
Led by University of Kansas Medical Center · Updated on 2026-05-04
150
Participants Needed
2
Research Sites
34 weeks
Total Duration
The trial investigates the use of the RetroPerc device to obtain renal access in patients undergoing percutaneous nephrolithotomy PCNL for renal stones. The goal is to better understand specific details of this access technique through a prospective observational study, as the device is already used in routine clinical care. Participants planned for PCNL as part of their usual care are invited to join the study. Participants with single or multiple renal stones totaling 1.5 to 3 cm in size will undergo PCNL using the RetroPerc system in the supine position. The study is observational and does not alter standard care. It focuses on collecting detailed information about the procedure, including success rates of renal access and various procedure-related times. During the study, researchers will monitor how often renal access is successfully obtained, where the access is located, the time taken to gain access, total procedure time, and length of hospital stay after surgery. Participants will be assessed from the day of surgery up to three months post-operation. Data collection will include standard care evaluations without additional interventions beyond routine clinical practice.
CONDITIONS
RETRO Study (RETrograde Renal Access Outcomes)
R
Research Program Manager
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University of Kansas Medical Center
Lead Sponsor
RetroPerc Inc
Collaborating Sponsor
You may qualify if you...
You will not qualify if you...
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Day of procedure
Participants undergo percutaneous nephrolithotomy as part of their routine medical care using the RetroPerc® system to obtain renal access.
1 visit (in-person)
Duration - Up to 3 months post-operative
Participants are monitored for recovery and outcomes after the procedure.
Approximately 3 visits (in-person)
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
1
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Lead Sponsor
RetroPerc Inc
Collaborating Sponsor