se of flexible vacuum-assisted ureteral access sheath (UAS) in RIRS for complicated kidney stone cases:a prospective multi-center research

Use of flexible vacuum-assisted ureteral access sheath (UAS) in RIRS for complicated kidney stone cases:a prospective multi-center research

Status

Active, not recruiting

Phases

Early Phase 1

Study type

Observational

Source

ChiCTR

Registry ID

ChiCTR2300074268

Enrollment

Unknown

Registered

2023-08-02

Start date

2023-08-10

Completion date

Unknown

Last updated

2023-08-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Kidney stone

Interventions

Novel UAS group:NA

Eligibility

Sex/Gender

All

Age

18 Years to 80 Years

Inclusion criteria

Inclusion criteria: 1. renal stones >2 cm or renal cast stones; 2. stones in the lower pole of the renal calyces with IPA <40°; 3. preoperative imaging or urinalysis suggestive of severe urinary tract infection or renal pus accumulation; 4. ureteral stone street formation;

Exclusion criteria

Exclusion criteria: 1. congenital anatomical abnormalities of the kidney 2. severe urinary and pelvic disorders (except kidney stones or urinary tract infections). 3. hematuria of unknown origin; 4. conditions that preclude RIRS surgery 5. participation in other clinical trials in the 3 months prior to screening;

Design outcomes

Primary

Measure	Time frame
Surgery time;stone free rate;Postoperative complications;Stone characteristics;	—

Secondary

Measure	Time frame
blood routine test;urine routine test;renal function test;	—

Countries

China

Contacts

Public ContactJiayu Liu

The First Affiliated Hospital of Chongqing Medical University

urologistzhang2022@163.com+86 186 9668 2178

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026