Tip Bendable Suction Ureteral Access Sheath vs. Traditional Ureteral Access Sheath in Retrograde Intrarenal Stone Surgery
- Conditions
- Kidney Stone
- Interventions
- Procedure: Tip bendable suction ureteral access sheath
- Registration Number
- NCT05952635
- Lead Sponsor
- The First Affiliated Hospital of Guangzhou Medical University
- Brief Summary
Nephrolithiasis is the most common chronic kidney condition and affecting approximately one in every 10-17 people in the world\[1,2\]. Flexible ureteroscopy (f-URS) has become one of the most common treatments for ureteral and renal stones with minimal complications. The development of ureteral access sheath (UAS) is a significant advance in flexible ureteroscopic management of urinary stones. The UAS has two major advantages: 1) facilitating multiple entries into the renal collecting system without causing recurrent trauma to the ureter and permit expeditious basketing of multiple stone fragments, 2) improving the irrigation with better fluid outflow, thereby reducing the renal pelvic pressure (RPP) and risk of infectious complications.
The tip bendable suction ureteral access sheath (S-UAS) is a novel UAS that has good flexibility and deformability at the tip, which can passively bend (bend \>90°) with the bending of f-URS and can connect to a vacuum suction device. Preliminary study showed that S-UAS can follow f-URS to cross the UPJ and into the renal pelvis and calices. S-UAS close to the stone can achieve complete stone-free status in RIRS. However, further clinical studies and comparisons with available techniques are required. This prospective, single-blinded, single-center, randomized control trial will evaluate the stone free rates, operative time, postoperative complications following RIRS with S-UAS. To the best of our knowledge, this is the first study to compare the clinical benefits of RIRS with S-UAS and traditional UAS.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 320
- Adults aged ≥ 18 years;
- American Society of Anesthesiology score 1-3;
- Upper urinary stone (kidney stone or upper ureteral stone) diameter of ≤ 3 cm confirmed by CT;
- Capable of giving written informed consent, which includes adherence with the requirements of the trial.
- Patients with abnormal urinary tract anatomy (such as horseshoe kidney or ileal conduit);
- Patients with uncontrolled UTI;
- Patients with health or other factors that are absolute contraindications to RIRS;
- Patients unable to understand or complete trial documentation.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Tip bendable suction ureteral access sheath (S-UAS) group Tip bendable suction ureteral access sheath Patients will use S-UAS during flexible ureteroscopy.
- Primary Outcome Measures
Name Time Method Immediate stone-free rate Postoperative day 1 No residual stone, or no stone fragments larger than 2 mm on KUB and ultrasound at postoperative day 1 are defined as stone free.
- Secondary Outcome Measures
Name Time Method Duration of hospital stay From date of operation until the date of discharge, assessed up to 2 weeks. Complications up to 3 months post randomization Postoperative 3 month Operative time From start of operation until the end of operation, assessed up to 2 weeks. The duration from the insertion of the endoscope into the urethra to the completion of stent placement.
Stone-free rate at 3 months Postoperative 3 month No residual stone, or no stone fragments larger than 2 mm on CT scan at postoperative 3 month are defined as stone free.
Further interventions received up to 3 months post randomization Postoperative 3 month Change of Quality of life Score (prior to surgery and at month 3 after randomization) Postoperative 3 month
Trial Locations
- Locations (1)
Department of Urology, The First Affiliated Hospital of Guangzhou Medical University
🇨🇳Guangzhou, Guangdong, China