Comparison of intra-ureteral placement versus conventional placement, with loop-tail ureteral stent, for stent-related quality of life and complications after ureteroscopic lithotripsy: a prospective randomized control trial

Comparison of intra-ureteral placement versus conventional placement, with loop-tail ureteral stent, for stent-related quality of life and complications after ureteroscopic lithotripsy: a prospective randomized control trial - Comparison of intra-ureteral placement versus conventional placement, with loop-tail ureteral stent, for stent-related quality of life and complications after ureteroscopic lithotripsy: a prospective randomized control trial

Status

Active, not recruiting

Phases

Phase 3

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000023497

Enrollment

Registered

2016-08-05

Start date

2016-08-05

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Urolithiasis

Interventions

Stent implantation with conventional technique Stent implantation with intra-ureteral placement technique

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1.Patients undergoing transurethral lithotripsy (TUL) for renal and/or ureteral stone 2.Patients with informed consent

Exclusion criteria

Exclusion criteria: 1.Patients with lower ureteral stone (U3) 2.Patients who had pre-stenying 3.Patients potentially requiring a ureteric stent for >14days postoperatively 4.Patients undergoing bilateral TUL 5.Patients with solitary kidney 6.Patients with difficulty of communication 7.Pregnant 8.patients who have been determined to be unsuitable as a subject by a physician

Design outcomes

Primary

Measure	Time frame
Change from baseline to each point in mean total score of Visual analog scale	—

Secondary

Measure	Time frame
Change from baseline to each point in mean sub-score of IPSS, OABSS, Visual analog scale, and SF36v2 Change from baseline to each point in mean total of SF-36v2 and IPSS and OABSS. Safety assessment Presence of hydronephrosis confirmed by ultrasonography after urethral catheter removal Migration of tip of suture (intra-ureteral placement group) or tip of stent (conventional placement group) into the ureter Presence of febrile urinary tract infection after urethral catheter removal Early spontaneous stent removal Retained stent Other stent-related symptoms	—

Measure

Time frame

Change from baseline to each point in mean sub-score of IPSS, OABSS, Visual analog scale, and SF36v2 Change from baseline to each point in mean total of SF-36v2 and IPSS and OABSS. Safety assessment Presence of hydronephrosis confirmed by ultrasonography after urethral catheter removal Migration of tip of suture (intra-ureteral placement group) or tip of stent (conventional placement group) into the ureter Presence of febrile urinary tract infection after urethral catheter removal Early spontaneous stent removal Retained stent Other stent-related symptoms

—

Countries

Japan

Contacts

Public ContactTakashi Yoshida

Kansai Medical University, kori hospital Department of Urology and Andrology

yoshidtk@takii.kmu.ac.jp0728329500

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026