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EndoFLIP-Guided Initial Management of Esophagogastric Junction Outflow Obstruction (O-FLIP)

4 novembre 2026 aggiornato da: Elizabeth Barba, Hospital Clinic of Barcelona

Prospective Evaluation of an Impedance Planimetry-Guided Therapeutic Stratification Algorithm in Patients With Esophagogastric Junction Outflow Obstruction After Endoscopic Assessment: O-FLIP Multicenter Study

Esophagogastric junction outflow obstruction (EGJOO) can make it difficult for food to pass from the esophagus into the stomach. Some people improve without a procedure to treat the obstruction, while others have persistent swallowing difficulties and may need further treatment.

The O-FLIP study tests whether measurements taken during an endoscopy with a tool called EndoFLIP can help doctors choose an initial treatment for adults with EGJOO. The main outcome is improvement in swallowing symptoms three months after initial management. The study will also track how long improvement lasts and how many participants need further treatment over one year.

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

O-FLIP is a prospective, multicenter, nonrandomized, single-arm interventional study evaluating an EndoFLIP-guided initial management strategy for esophagogastric junction outflow obstruction (EGJOO). Specialist esophageal motility units in Spain will enroll consecutive adults with clinically relevant dysphagia who meet the study eligibility criteria. Baseline data will include clinical characteristics, symptom scores, and findings from high-resolution manometry, timed barium esophagram, upper gastrointestinal endoscopy, and EndoFLIP panometry.

Participating centers will receive common training and use a standardized protocol for EndoFLIP acquisition and interpretation based on the Dallas Consensus. The treating endoscopist will interpret EndoFLIP findings in real time to guide initial management. The coordinating center will subsequently review coded recordings to assess measurement quality and agreement with the local classification.

Symptoms and scores on the Brief Esophageal Dysphagia Questionnaire (BEDQ) and Eckardt score will be recorded at 1, 3, 6, and 12 months, along with treatment changes, dysphagia recurrence, adverse events, and treatment escalation. Follow-up will start on the date of botulinum toxin administration for participants who receive it and on the date of the index endoscopy for those initially managed conservatively.

The primary analysis will estimate the proportion of participants with clinical response at 3 months in the overall cohort, with a 95% confidence interval. Outcomes will also be summarized by baseline EndoFLIP category. Secondary analyses will assess the durability of response and time to definitive treatment directed at the esophagogastric junction. Among participants who receive botulinum toxin, exploratory analyses will examine baseline clinical and physiological factors associated with an incomplete or transient response and with subsequent definitive treatment. Additional exploratory analyses will examine how baseline timed barium esophagram findings relate to EndoFLIP findings and clinical outcomes.

Tipo di studio

Interventistico

Iscrizione (Stimato)

115

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

  • Nome: Jorge Luis Núñez-Pizarro, MD
  • Numero di telefono: 3459 +34 932 27 54 00
  • Email: jlnunez@clinic.cat

Luoghi di studio

    • Barcelona
      • Barcelona, Barcelona, Spagna, 08036
        • Hospital Clínic de Barcelona
        • Contatto:
          • Jorge Luis Nuñez-Pizarro, MD
          • Numero di telefono: 3459 +34 932 27 54 00
          • Email: jlnunez@clinic.cat
        • Investigatore principale:
          • Jorge Luis Nuñez-Pizarro, MD
        • Sub-investigatore:
          • Isis Karina Araujo, MD, PhD
        • Sub-investigatore:
          • Elizabeth Barba Orozco, MD, PhD
        • Sub-investigatore:
          • Gloria Fernández-Esparrach, MD, PhD
        • Sub-investigatore:
          • Alberto Ezquerra, MD
    • Madrid
      • Madrid, Madrid, Spagna, 28041
        • Hospital Universitario 12 de Octubre
        • Contatto:
        • Investigatore principale:
          • Isabel Castel de Lucas, MD
      • Madrid, Madrid, Spagna, 28040
        • Hospital Clínico San Carlos
        • Contatto:
        • Investigatore principale:
          • Constanza Ciriza de los Ríos, MD, PhD
        • Investigatore principale:
          • Ana Zatarain Valles, MD
      • Madrid, Madrid, Spagna
        • Hospital de La Princesa
        • Contatto:
        • Investigatore principale:
          • Cecilio Santander Vaquero, MD, PhD
    • Majadahonda
      • Madrid, Majadahonda, Spagna, 28222
        • Hospital Universitario Puerta de Hierro Majadahonda
        • Contatto:
        • Investigatore principale:
          • Rosalia González-Miyar, MD
    • Pamplona
      • Pamplona, Pamplona, Spagna, 31008
        • Hospital Universitario de Navarra
        • Contatto:
        • Investigatore principale:
          • Fermin Estremera-Arévalo, MD, PhD

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

18 anni e precedenti (Adulto, Adulto più anziano)

Accetta volontari sani

No

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Age 18 years or older.
  • Written study-specific informed consent.
  • Clinically relevant dysphagia, defined as a Brief Esophageal Dysphagia Questionnaire (BEDQ) score of at least 8.
  • High-resolution manometry findings consistent with esophagogastric junction outflow obstruction (EGJOO) according to Chicago Classification version 4.0: elevated median integrated relaxation pressure in both the supine and upright positions, evidence of peristalsis, and intrabolus pressure greater than 20 mmHg in at least 20% of supine swallows, without meeting criteria for achalasia. Premature or hypercontractile contractions are permitted when peristalsis is present and criteria for type III achalasia are not met.

Exclusion Criteria:

  • Prior surgery or treatment directed at the esophagogastric junction, including botulinum toxin injection, pneumatic dilation, peroral endoscopic myotomy (POEM), Heller myotomy, or fundoplication.
  • Current opioid use unless opioids can be discontinued for at least 1 week before enrollment.
  • Hiatal hernia larger than 3 cm, peptic stricture, esophageal rings, esophagogastric malignancy, or any other mechanical cause of dysphagia. This includes a mechanical cause detected during the index endoscopy before EndoFLIP.
  • Eosinophilic esophagitis.
  • Systemic or infectious disease that significantly affects esophageal motility, such as systemic sclerosis or Chagas disease.
  • Inability to complete the planned clinical follow-up.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: N / A
  • Modello interventistico: Assegnazione di gruppo singolo
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: EndoFLIP-Guided Clinical-Care Strategy

All participants will follow a standardized management algorithm based on esophagogastric junction (EGJ) opening on EndoFLIP panometry. Reduced opening will lead to botulinum toxin type A injection during the same endoscopy. Inconclusive or normal opening will lead to initial conservative management, which may include observation, proton pump inhibitors, neuromodulators, or calcium channel blockers at the treating physician's discretion.

EndoFLIP panometry will be performed during the index upper gastrointestinal endoscopy after mechanical causes of dysphagia have been excluded. The treating endoscopist will classify EGJ opening in real time according to standardized Dallas Consensus criteria. Coded recordings will subsequently undergo central review to assess measurement quality and agreement with the local classification.

Altri nomi:
  • Functional Lumen Imaging Probe
  • Impedance Planimetry
  • FLIP Panometry

Botulinum toxin type A will be injected endoscopically into the lower esophageal sphincter in participants with reduced EGJ opening. The treating physician will be responsible for prescribing and administering the injection as part of the EndoFLIP-guided management strategy.

Altri nomi:
  • BOTOX

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Proportion of Participants With Clinical Response at 3 Months
Lasso di tempo: 3 months after botulinum toxin administration or, for participants initially managed conservatively, 3 months after the index endoscopy.

Proportion of participants in the overall cohort with at least a 50% reduction from baseline in the Brief Esophageal Dysphagia Questionnaire (BEDQ) total score. BEDQ scores range from 0 to 40, with higher scores indicating more severe dysphagia.

3 months after botulinum toxin administration or, for participants initially managed conservatively, 3 months after the index endoscopy.

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Clinical Response During Follow-up
Lasso di tempo: Months 1, 6, and 12.

Proportion of participants with at least a 50% reduction from baseline in BEDQ total score.

Months 1, 6, and 12.
Change From Baseline in BEDQ Score
Lasso di tempo: Baseline and months 1, 3, 6, and 12.

Change in BEDQ total score from baseline. Scores range from 0 to 40, with higher scores indicating more severe dysphagia.

Baseline and months 1, 3, 6, and 12.
Change From Baseline in Eckardt Score
Lasso di tempo: Baseline and months 1, 3, 6, and 12.

Change in Eckardt symptom score from baseline. Scores range from 0 to 12, with higher scores indicating greater symptom burden.

Baseline and months 1, 3, 6, and 12.
Sustained Clinical Response
Lasso di tempo: Months 3 through 12.

Proportion of participants with a clinical response at month 3 who maintain at least a 50% reduction from baseline in BEDQ score through month 12 without recurrence.

Months 3 through 12.
Dysphagia Recurrence After Clinical Response
Lasso di tempo: From the first documented response through month 12.

Proportion of participants with a previously documented clinical response who subsequently have a BEDQ reduction of less than 50% from baseline.

From the first documented response through month 12.
Proportion of Participants Receiving Definitive EGJ-Directed Treatment
Lasso di tempo: Through month 12.

Proportion of participants who undergo pneumatic dilation, peroral endoscopic myotomy, or Heller myotomy after initial management, and time from the start of follow-up to the first such treatment.

Through month 12.
Adverse Events Related to Procedures or Treatment
Lasso di tempo: From the index endoscopy through month 12.

Proportion of participants with at least one adverse event associated with endoscopy, EndoFLIP, or treatment. Event severity will be reported using the AGREE classification, from grade I to V

From the index endoscopy through month 12.
Agreement Between Local and Central EndoFLIP Classification
Lasso di tempo: Index endoscopy, with subsequent central review of the same recording.

Agreement on EGJ opening category (reduced, inconclusive, or normal), quantified using Cohen's kappa with a 95% confidence interval.

Index endoscopy, with subsequent central review of the same recording.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Collaboratori

Investigatori

  • Investigatore principale: Jorge Luis Núñez-Pizarro, MD, Hospital Clinic of Barcelona

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Pubblicazioni generali

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

7 dicembre 2026

Completamento primario (Stimato)

6 marzo 2029

Completamento dello studio (Stimato)

6 dicembre 2029

Date di iscrizione allo studio

Primo inviato

4 novembre 2026

Primo inviato che soddisfa i criteri di controllo qualità

4 novembre 2026

Primo Inserito (Effettivo)

10 novembre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

10 novembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

4 novembre 2026

Ultimo verificato

1 novembre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • HCB/2026/1095

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Descrizione del piano IPD

There is no plan to make individual participant data available to researchers outside the study team. Coded EndoFLIP recordings without direct participant identifiers will be transferred from participating sites to the coordinating center for central review as part of the study. The code key will remain at the originating site.

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

Sì

prodotto fabbricato ed esportato dagli Stati Uniti

Sì

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .