Actively Recruiting
A Single-Center Clinical Study on the Efficacy and Safety of Vortex Intelligence Stone Optimized Removal (VISOR)
Led by Second Affiliated Hospital, School of Medicine, Zhejiang University · Updated on 2025-09-26
20
Participants Needed
1
Research Sites
69 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are evaluating a new tool called VISOR in adults aged 18 to 80 who have kidney or ureter stones measuring 1 to 3 cm. The study aims to determine if VISOR is safe and effective in clearing stones during surgery by using its built-in features such as flushing, suction, pressure control, and stone-breaking and removal. The main questions are whether VISOR can clear stones successfully for at least 90% of participants within 24 hours after surgery, keep serious complications below 5%, and maintain safe pressure levels inside the kidney during the procedure. All participants will undergo stone removal surgery using the investigational VISOR device. This device integrates irrigation and suction with real-time pressure monitoring to keep kidney pressure below 30 mmHg during surgery. It uses a holmium laser to break stones while simultaneously removing fragments. After surgery, participants will have a CT scan within 24 hours to check if stones are cleared, followed by a follow-up imaging test (CT or ultrasound) around 4 weeks later to monitor any complications and the longer-term stone-free rate. Participants will be closely monitored during and after surgery with continuous pressure tracking and assessments for any ureteral injuries or infections. They will attend a follow-up visit about 4 weeks after surgery for imaging and health evaluation related to the procedure. Researchers will measure the immediate and 1-month stone-free rates, operative time, intraoperative kidney pressure, and rates of complications to evaluate the safety and effectiveness of VISOR. Total participation includes surgery, immediate post-op imaging, and follow-up within about one month.
CONDITIONS
Brief Title
A Single-Center Clinical Study on the Efficacy and Safety of VISOR
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Patients with upper urinary tract stones measuring 1 to 3 cm in single or combined size
- Patients who choose to undergo flexible ureteroscopic holmium laser lithotripsy
- Aged 18 to 80 years, any gender
- Able to understand the study and sign informed consent, without mental illness or language issues
You will not qualify if you...
- Patients with ureteral stricture or history of ureteral stricture
- Patients with prior open or laparoscopic kidney or ureter surgery
- Fever of 38°C or higher within one week before surgery
- Pregnant, breastfeeding, or menstruating women
- Patients with severe systemic diseases or organ failure (ASA classification above Grade 3)
- Patients with anatomical kidney abnormalities such as polycystic, horseshoe, or ectopic kidney
- Patients with abnormal blood clotting (INR > 1.5 or low platelet count)
- Patients with failed sheath placement during surgery
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 visit (in-person)
Duration - Single procedure day
Participants undergo upper urinary tract stone removal using the investigational VISOR device, which integrates real-time pressure control, lithotripsy, and simultaneous stone fragment removal.
1 surgical procedure visit (in-person)
Duration - 28 ± 7 days
Participants receive postoperative assessments including a urinary CT scan at 24 hours to determine stone clearance and additional imaging and complication monitoring around 28 days post-surgery.
1 visit at 24 hours and 1 follow-up visit at 28 ± 7 days (in-person)
Trial Site Locations
Total: 1 location
1
2nd Affiliated Hospital, School of Medicine, Zhejiang University
Hangzhou, Zhejiang, China, 230000
Actively Recruiting
Research Team
B
Bohan Wang, MD., Ph.D
W
Wenjun Gao, MD., Ph.D
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
NA
Model
SINGLE_GROUP
Primary Purpose
TREATMENT
Number of Arms
1
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