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ComfiJ Versus Conventional Double-J Stent for Ureteral Stent Symptoms (COMFIJ-DJS)

30. maj 2026 opdateret af: Hany Fathy Badawy, MD, Beni-Suef University

Evaluation of Stent-Related Symptoms After ComfiJ Ureteric Stent Versus Conventional Double-J Ureteric Stent: A Prospective Multicenter Randomized Controlled Trial

This prospective multicenter randomized controlled trial will compare stent-related symptoms after placement of a ComfiJ ureteral stent versus a conventional double-J ureteral stent in adult patients undergoing unilateral ureteroscopy or retrograde intrarenal surgery for urinary stones when short-term postoperative ureteral stenting is clinically indicated. Eligible patients will be randomized intraoperatively after the operating surgeon confirms the need for postoperative stenting. The primary outcome will be the Ureteral Stent Symptom Questionnaire urinary symptoms domain score on postoperative day 14 before planned stent removal.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Ureteral stents are frequently used after ureteroscopy and retrograde intrarenal surgery when temporary postoperative drainage is clinically indicated. However, ureteral stents may cause urinary symptoms, pain, hematuria, impaired daily activity, and reduced quality of life. Stent-related morbidity is therefore an important patient-centered outcome in endourology.

This study will compare a ComfiJ ureteral stent with a conventional double-J ureteral stent in adult patients undergoing unilateral ureteroscopy or retrograde intrarenal surgery for urinary stones. Randomization will be performed only after the surgeon has determined intraoperatively that postoperative stenting is required. Patients will be randomized in a 1:1 ratio to receive either a ComfiJ ureteral stent or a conventional double-J ureteral stent. The planned stent dwell time will be 14 days whenever clinically feasible.

The patient and postoperative outcome assessor will be blinded to treatment allocation. The operating surgeon will not be blinded because the stent type is visible during insertion. Stent-related symptoms will be assessed using the validated Arabic Ureteral Stent Symptom Questionnaire, together with pain scores, analgesic use, emergency visits, complications, stent migration, ease of insertion and removal, and patient satisfaction.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

150

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Studiesteder

  • Egypten
      • Minya, Egypten
        • Rekruttering
        • Department of Urology- Minia University Hospitals
        • Ledende efterforsker:
          • M Abdelmalek, MD
        • Kontakt:
      • Tanta, Egypten
        • Rekruttering
        • Department of Urology- Tanra University Hospitals
        • Ledende efterforsker:
          • I Elmaadawy, MD
        • Kontakt:
          • I Elmaadawy, MD
          • Telefonnummer: +201060245430
        • Kontakt:
    • Beni Suweif Governorate
      • Banī Suwayf, Beni Suweif Governorate, Egypten, 02456
        • Rekruttering
        • Department of Urology- Beni-Suef University Hospitals
        • Kontakt:
        • Ledende efterforsker:
          • Hany F Badawy, MD

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Beskrivelse

Inclusion Criteria:

  • Age 18 to 80 years.
  • Adult patients undergoing unilateral ureteroscopy or retrograde intrarenal surgery for ureteric or renal stones.
  • Intraoperative confirmation that short-term postoperative ureteric stenting for approximately 2 weeks is clinically indicated.
  • Indications for postoperative stenting may include ureteric edema, minor ureteric mucosal trauma, need for ureteric dilatation, ureteral access sheath use with expected postoperative edema, impacted stone, residual dust or fragments requiring temporary drainage, or prolonged procedure.
  • Ability to understand and complete the Arabic Ureteral Stent Symptom Questionnaire.
  • Ability to provide written informed consent.

Exclusion Criteria:

  • Cases in which no postoperative ureteric stent is clinically indicated.
  • Cases requiring prolonged urinary drainage or major reconstructive decision-making.
  • Bilateral ureteroscopy or retrograde intrarenal surgery.
  • Solitary kidney.
  • Major ureteric injury or ureteric perforation.
  • Preoperative febrile urinary tract infection or sepsis.
  • Pregnancy or breastfeeding.
  • Neurogenic bladder.
  • Overactive bladder syndrome.
  • Major neurological disease or psychiatric disease affecting symptom reporting.
  • History of major bladder, prostate, or pelvic surgery likely to confound stent-related symptoms.
  • Concomitant use of alpha-blockers, anticholinergics, chronic analgesics, or other medications likely to alter symptom evaluation.
  • Other acute medical conditions that might influence the Ureteral Stent Symptom Questionnaire pain score, including acute pancreatitis, acute gastroenteritis, or musculoskeletal disorders.
  • Known allergy to any study-related medication or device material.
  • Inability to comply with the follow-up schedule.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Dobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: ComfiJ Ureteral Stent
Patients randomized to this arm will receive a ComfiJ ureteral stent after unilateral ureteroscopy or retrograde intrarenal surgery when short-term postoperative ureteral stenting is clinically indicated. Planned stent removal will be performed on postoperative day 14 whenever clinically feasible.
Enhed: ComfiJ Ureteral Stent
Placement of a ComfiJ ureteral stent after unilateral ureteroscopy or retrograde intrarenal surgery for urinary stones when short-term postoperative ureteral stenting is clinically indicated.
Aktiv komparator: Conventional Double-J Ureteral Stent
Patients randomized to this arm will receive a conventional double-J ureteral stent after unilateral ureteroscopy or retrograde intrarenal surgery when short-term postoperative ureteral stenting is clinically indicated. Planned stent removal will be performed on postoperative day 14 whenever clinically feasible.
Enhed: Conventional Double-J Ureteral Stent
Placement of a conventional double-J ureteral stent after unilateral ureteroscopy or retrograde intrarenal surgery for urinary stones when short-term postoperative ureteral stenting is clinically indicated.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Ureteral Stent Symptom Questionnaire Urinary Symptoms Domain Score at Postoperative Day 14
Tidsramme: Postoperative Day 14 before stent removal
The urinary symptoms domain score of the Arabic linguistically validated Ureteral Stent Symptom Questionnaire (USSQ) will be assessed at postoperative Day 14 before stent removal. The urinary symptoms domain score ranges from 6 to 42, with higher scores indicating worse urinary stent-related symptoms.
Postoperative Day 14 before stent removal

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Total Ureteral Stent Symptom Questionnaire Score at Postoperative Day 7
Tidsramme: Postoperative Day 7
The total score of the Arabic linguistically validated Ureteral Stent Symptom Questionnaire (USSQ) will be assessed at postoperative Day 7. The USSQ evaluates six domains: urinary symptoms, body pain, general health, work performance, sexual matters, and additional problems. The total score will be calculated as the sum of the six domain scores, with a possible total score range from 27 to 157. Higher scores indicate worse ureteral stent-related symptoms and poorer health-related quality of life.
Postoperative Day 7
Total Ureteral Stent Symptom Questionnaire Score at Postoperative Day 14
Tidsramme: Postoperative Day 14
The total score of the Arabic linguistically validated Ureteral Stent Symptom Questionnaire (USSQ) will be assessed at postoperative Day 14. The USSQ evaluates six domains: urinary symptoms, body pain, general health, work performance, sexual matters, and additional problems. The total score will be calculated as the sum of the six domain scores, with a possible total score range from 27 to 157. Higher scores indicate worse ureteral stent-related symptoms and poorer health-related quality of life.
Postoperative Day 14
Visual Analogue Scale Pain Score
Tidsramme: Postoperative Day 1, postoperative Day 7, and postoperative Day 14
Pain intensity will be assessed using a Visual Analogue Scale. The possible score range is 0 to 10, where 0 indicates no pain and 10 indicates the worst imaginable pain. Higher scores indicate worse pain.
Postoperative Day 1, postoperative Day 7, and postoperative Day 14
Febrile Urinary Tract Infection
Tidsramme: Up to postoperative Day 14
Occurrence of febrile urinary tract infection after ureteral stent insertion, defined as postoperative fever (≥38.0°C) with clinical or laboratory evidence suggestive of urinary tract infection requiring medical evaluation or treatment.
Up to postoperative Day 14
Stent Migration or Displacement
Tidsramme: From stent insertion to stent removal on postoperative Day 14
Occurrence of ureteral stent migration or displacement documented clinically, endoscopically, or radiologically during the stent dwelling period.
From stent insertion to stent removal on postoperative Day 14

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Beni-Suef University

Efterforskere

  • Ledende efterforsker: Hany F Badawy, MD, Faculty of medicine Beni-Suef University

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

2. maj 2026

Primær færdiggørelse (Anslået)

1. april 2027

Studieafslutning (Anslået)

1. maj 2027

Datoer for studieregistrering

Først indsendt

30. maj 2026

Først indsendt, der opfyldte QC-kriterier

30. maj 2026

Først opslået (Faktiske)

4. juni 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

4. juni 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

30. maj 2026

Sidst verificeret

1. maj 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • COMFIJ DJ MRCT 2026

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

Individual participant data will not be shared because the study involves individual-level clinical, operative, and patient-reported symptom data from a multicenter interventional trial. Only aggregated, de-identified study results will be reported in publications or presentations. Any future data sharing request will require approval from the Research Ethics Committee, Faculty of Medicine, Beni-Suef University, and the corresponding ethics committees of the participating centers.

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