The Effect of Different Body Positions and Channel Sheaths on RIRS
Recruiting
N/AInterventional Study
Urolithiasis
No Placebo Group
Every participant receives an active treatment — no one gets a placebo.
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At a Glance
Age
18 – 70
Sex
Any
Study type
Interventional
Purpose
Treatment
Participants needed
120 (estimated)
Sponsor
The First Affiliated Hospital of Guangzhou Medical University · Other
Who this trial is looking for
This trial is looking for adults with specific kidney stones to compare different body positions and tools used during a procedure. Participants will help researchers understand how these factors affect the success of getting rid of the stones.
Are You a Good Fit for This Trial?
You may be able to join if
I have lower pole kidney stones that are 10-20 mm in size
I have an ASA score of Ⅰ, Ⅱ, or Ⅲ
I am an adult
You may not be able to join if
I have a ureteric stricture
I have a urethral deformity
I have a renal malformation, like a horseshoe kidney
I am pregnant
I have multiple stones in different parts of my kidney
Summarized in plain language from this trial's official eligibility criteria.
The full criteria are further down this page — only the research team can
confirm whether you qualify.
Think this trial could be right for you?
Answer a few quick questions to see if you may meet the eligibility requirements.
Retrograde flexible ureteroscopy (RIRS) is currently the first-line treatment for renal stones \< 2cm. Lower pole renal stones(LPS) are a difficult problem for urologists. The flexible negative pressure suction ureteral sheath(f-UAS) can facilitate RIRS to flush out the fragments and dust in time, and provide a clear vision and reduce the renal pelvis pressure(RPP) during operation.Standard lithot…
Retrograde flexible ureteroscopy (RIRS) is currently the first-line treatment for renal stones \< 2cm. Lower pole renal stones(LPS) are a difficult problem for urologists. The flexible negative pressure suction ureteral sheath(f-UAS) can facilitate RIRS to flush out the fragments and dust in time, and provide a clear vision and reduce the renal pelvis pressure(RPP) during operation.Standard lithotomy position is the most commonly used position for RIRS. Besides, T-tilt position is also available for RIRS in special cases. Investigators were inspired by this and proposed the lateral position, which is available in cases of LPS.In long-term practice, investigators have found that the change of position and the use of f-UAS can improve stone-free rate(SFR). Investigators aimed to conduct a prospective randomized controlled trial to compare the SFR of different positions and different ureteral sheaths.
Trial Locations
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Eligibility Criteria
Inclusion Criteria:
* LPS with a diameter of 10-20 mm
* American Society of Anesthesiologists(ASA) score Ⅰ,Ⅱ and Ⅲ
* Adult patients
Exclusion Criteria:
* Ureteric stricture
* Urethral deformity
* Renal malformation, including horseshoe kidney, ectopic kidney and transplanted kidney
* Pregnancy
* …
Inclusion Criteria:
* LPS with a diameter of 10-20 mm
* American Society of Anesthesiologists(ASA) score Ⅰ,Ⅱ and Ⅲ
* Adult patients
Exclusion Criteria:
* Ureteric stricture
* Urethral deformity
* Renal malformation, including horseshoe kidney, ectopic kidney and transplanted kidney
* Pregnancy
* Multiple stones in diferent calyces, including upper pole and middle pole
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