Actively Recruiting

Phase Not Applicable
Age: 18Years - 80Years
All Genders
ID07071948

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

Age: 18Years - 80Years
All Genders

Eligibility Criteria

Eligible

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
Not Eligible

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

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

1 visit (in-person)

Treatment

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)

Follow-up

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

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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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