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

30 mei 2026 bijgewerkt door: 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.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

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.

Studietype

Ingrijpend

Inschrijving (Geschat)

150

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Egypte
      • Minya, Egypte
        • Werving
        • Department of Urology- Minia University Hospitals
        • Hoofdonderzoeker:
          • M Abdelmalek, MD
        • Contact:
      • Tanta, Egypte
        • Werving
        • Department of Urology- Tanra University Hospitals
        • Hoofdonderzoeker:
          • I Elmaadawy, MD
        • Contact:
          • I Elmaadawy, MD
          • Telefoonnummer: +201060245430
        • Contact:
    • Beni Suweif Governorate
      • Banī Suwayf, Beni Suweif Governorate, Egypte, 02456
        • Werving
        • Department of Urology- Beni-Suef University Hospitals
        • Contact:
        • Hoofdonderzoeker:
          • Hany F Badawy, MD

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Beschrijving

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.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Dubbele

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: 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.
Apparaat: 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.
Actieve vergelijker: 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.
Apparaat: 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.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Ureteral Stent Symptom Questionnaire Urinary Symptoms Domain Score at Postoperative Day 14
Tijdsspanne: 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

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Total Ureteral Stent Symptom Questionnaire Score at Postoperative Day 7
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Beni-Suef University

Onderzoekers

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

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

2 mei 2026

Primaire voltooiing (Geschat)

1 april 2027

Studie voltooiing (Geschat)

1 mei 2027

Studieregistratiedata

Eerst ingediend

30 mei 2026

Eerst ingediend dat voldeed aan de QC-criteria

30 mei 2026

Eerst geplaatst (Werkelijk)

4 juni 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

4 juni 2026

Laatste update ingediend die voldeed aan QC-criteria

30 mei 2026

Laatst geverifieerd

1 mei 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • COMFIJ DJ MRCT 2026

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Beschrijving IPD-plan

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.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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