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A Prospective, Multicenter, Controlled Clinical Study of Collagen Fibrous Scaffold for the Treatment of Cesarean Scar Diverticulum (CSD-SCAFFOLD)

Cesarean scar diverticulum (CSD, uterine niche) is a common long-term complication of cesarean delivery, frequently presenting with abnormal vaginal bleeding (postmenstrual spotting, prolonged menses), pelvic pain, and adverse reproductive outcomes. Current surgical repair yields variable niche shrinkage and inconsistent symptom and fertility improvement. This prospective, multicenter, controlled study aims to evaluate the efficacy and safety of collagen fibrous scaffold implantation versus conventional repair alone. Eligible symptomatic women will be enrolled from multiple tertiary obstetrics and gynecology centers. The primary outcome is change in CSD niche volume measured by transvaginal three-dimensional ultrasound. Secondary outcomes include improvement of abnormal vaginal bleeding and reproductive outcomes. Participants will be followed at 1, 3, 6, and 12 months postoperatively.

Studieöversikt

Status

Har inte rekryterat ännu

Betingelser

Intervention / Behandling

Detaljerad beskrivning

This is a prospective, multicenter, parallel controlled interventional study in symptomatic women with cesarean scar diverticulum. Subjects meeting the inclusion criteria will be allocated to the intervention group (collagen fibrous scaffold implantation) or the control group (standard surgical repair without scaffold).

Baseline assessments include transvaginal 3D ultrasound for niche volume measurement, menstrual symptom diary, pelvic pain evaluation, reproductive history, pelvic imaging, and routine laboratory tests. The index repair surgery (hysteroscopic combined laparoscopic) is performed per standardized protocol by experienced gynecologic surgeons. In the intervention group, the collagen fibrous scaffold is placed at the CSD to support tissue regeneration and scar remodeling. The control group receives identical surgical repair without scaffold implantation.

Follow-up visits are scheduled at 1, 3, 6, and 12 months after surgery. At each visit, adverse events, vaginal bleeding pattern, menstrual duration, and pelvic discomfort are recorded. Transvaginal 3D ultrasound is performed to quantify niche volume. Reproductive data including spontaneous conception, clinical pregnancy, pregnancy continuation, and pregnancy complications are collected up to 12 months. Safety endpoints include intraoperative hemorrhage, visceral injury, surgical site infection, scaffold-related reactions, pelvic adhesion, and persistent pain. All adverse events are graded for severity and assessed for relatedness to the study device or procedure.

Primary analysis compares between-group difference in niche volume change from baseline to 6 months. Secondary analyses compare abnormal vaginal bleeding parameters and reproductive outcomes. Safety profiles will be summarized. Analyses will be conducted on intention-to-treat and per-protocol populations.

Studietyp

Interventionell

Inskrivning (Beräknad)

80

Fas

  • Inte tillämpbar

Kontakter och platser

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Studiekontakt

Studera Kontakt Backup

  • Namn: Zhejiang Provincial Clinical Research Center for Gynecological Women's Hospital, Zhejiang University School of Medicine

Studieorter

    • Zhejiang
      • Hangzhou, Zhejiang, Kina, 310006
        • Women's Hospital, School of Medicine, Zhejiang University
        • Kontakt:
        • Huvudutredare:
          • Ning Wang, M.D

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

20 år till 45 år (Vuxen)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Kvinna

Beskrivning

Inclusion Criteria:

  • At least one prior cesarean delivery
  • CSD confirmed by transvaginal 3D ultrasound with measurable niche volume
  • Symptomatic CSD: abnormal vaginal bleeding (prolonged menstruation, postmenstrual spotting, intermenstrual bleeding) attributed to the niche
  • Candidate for surgical CSD repair and willing to complete scheduled follow-up
  • Signed written informed consent

Exclusion Criteria:

  • Current pregnancy or unwillingness to use effective contraception for the first 6 months postoperatively
  • Coexisting uterine lesions requiring separate surgical intervention (submucous fibroids, large endometrial polyps, adenomyosis with dominant lesion)
  • Active pelvic inflammatory disease or untreated genital tract infection
  • Known allergy or hypersensitivity to collagen-derived biomaterials
  • Severe systemic disease or coagulopathy that contraindicates pelvic surgery
  • Suspected or confirmed gynecologic malignancy
  • Inability or unwillingness to complete required follow-up assessments

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Behandling
  • Tilldelning: Icke-randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Dubbel

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Arm 1: Intervention Group

Collagen fibrous scaffold is implanted at the site of the cesarean scar diverticulum under 3D ultrasound guidance, without hysteroscopic or laparoscopic surgery.

The diverticulum is localized under hysteroscopic guidance, and diverticulectomy and scar repair are performed laparoscopically without implantable collagen fibrous scaffold .

Andra namn:
  • Scaffold
Aktiv komparator: Arm 2: Control Group

Identical hysteroscopic combined laparoscopic surgical repair of the CSD defect; no collagen fibrous scaffold is implanted.

The diverticulum is localized under hysteroscopic guidance, and diverticulectomy and scar repair are performed laparoscopically without placement of implantable collagen fibrous scaffold.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change from baseline in cesarean scar niche volume (mL)
Tidsram: Baseline, 3 months

Cesarean scar niche volume will be assessed by three-dimensional transvaginal ultrasound and calculated by the ellipsoid formula (V = 0.523 × length × width × depth)at baseline and 3 months after intervention.

Baseline, 3 months

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change from baseline in abnormal vaginal bleeding
Tidsram: Baseline, 3, 6, 12 months

Assessed by menstrual diary, including total menstrual bleeding days, days of postmenstrual spotting, and intermenstrual bleeding episodes per menstrual cycle.

Baseline, 3, 6, 12 months
Reproductive outcome-clinical pregnancy rate
Tidsram: Baseline to 12 months

Include clinical pregnancy rate among participants attempting conception.

Baseline to 12 months
Reproductive outcome- ongoing pregnancy rate
Tidsram: Baseline to 12 months

Include ongoing pregnancy rate among participants attempting conception.

Baseline to 12 months
Reproductive outcome - early pregnancy loss rate
Tidsram: Baseline to 12 months

Include early pregnancy loss rate among participants attempting conception.

Baseline to 12 months
Reproductive outcome - cesarean scar pregnancy rate
Tidsram: Baseline to 12 months

Include cesarean scar pregnancy rate among participants attempting conception.

Baseline to 12 months
Incidence of adverse events
Tidsram: Intraoperative through 12 months

All device-related and procedure-related adverse events, graded by severity and causality.

Intraoperative through 12 months
Recurrence rate of cesarean scar diverticulum
Tidsram: 12 months

Recurrence defined as reappearance of measurable niche on 3D ultrasound after initial shrinkage or resolution.

12 months

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Sponsor

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Studieavstämningsdatum

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Studera stora datum

Studiestart (Beräknad)

6 november 2026

Primärt slutförande (Beräknad)

30 november 2029

Avslutad studie (Beräknad)

6 november 2032

Studieregistreringsdatum

Först inskickad

5 november 2026

Först inskickad som uppfyllde QC-kriterierna

10 november 2026

Första postat (Faktisk)

12 november 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

12 november 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

10 november 2026

Senast verifierad

1 november 2026

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • WHZ-JXX
  • 2025C02122 (Annat bidrag/finansieringsnummer: the Zhejiang Province's 2025 'Pioneer Leading Swan + X' Science and Technology Program)
  • 2024ZY01028 (Annat bidrag/finansieringsnummer: the Zhejiang Provincial Central Leading Local Science and Technology Development Fund Project)
  • ZDFY2023-4XPY101 (Annat bidrag/finansieringsnummer: the 4+X Clinical Research of Women's Hospital, School of Medicine, Zhejiang University)

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