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Development of a Noninvasive Metric to Measure Small Bowel Sensation - The Small Intestine Stress Test

8 settembre 2026 aggiornato da: Xiao Jing (Iris) Wang, Mayo Clinic
The purpose of this research is to identify the concentration of mannitol solution (a type of sugar alcohol) that will generate a range of symptoms in individuals without Disorders of Gut Brain Interaction (DGBI) to establish the normative range of responses to small bowel (SB) distension.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Tipo di studio

Interventistico

Iscrizione (Stimato)

20

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

Luoghi di studio

    • Minnesota
      • Rochester, Minnesota, Stati Uniti, 55905
        • Reclutamento
        • Mayo Clinic
        • Contatto:
          • Taylor Hines
          • Numero di telefono: 507-538-9959

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

  • Adulto
  • Adulto più anziano

Accetta volontari sani

Sì

Descrizione

Inclusion Criteria:

  • No current gastrointestinal symptoms
  • No prior history of GI disorders, in particular DGBIs
  • Ability to provide informed consent
  • Ability to participate in study procedures
  • Absence of other diseases (structural or metabolic) which could interfere with interpretation of the study results
  • For females, must not be pregnant or lactating due to radiation exposure.
  • Stable doses of thyroid replacement, estrogen replacement, low-dose aspirin for cardioprotection, and birth control are permissible.

Exclusion Criteria

  • Subjects on any medications that impact transit or integrity of small bowel mucosal barrier (e.g. chronic NSAIDS) of the GI tract will be excluded.
  • Patients with prior bowel surgery (not including appendectomy and cholecystectomy)
  • Patients who may have altered sensation (central sensitization or conditions that may induce bowel hyperalgesia) based on PI review of medical history (ie, fibromyalgia, endometriosis, chronic pelvic pain)

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

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: Healthy Volunteers Receiving Mannitol Solutions
Healthy adult volunteers will receive all three mannitol solution osmolarities-76 milliosmol (mOsm/L), 189 mOsm/L, and 325 mOsm/L-on three separate testing occasions spaced at least 5 days apart. Each solution will be administered orally as 500 mL radiolabeled with Pentetate Indium Disodium In-111 (111Indium-DTPA).
Participants will ingest 500 mL of mannitol solution at 76 mOsm/L radiolabeled with 111Indium-DTPA during one testing visit.
Participants will ingest 500 mL of mannitol solution at 189 mOsm/L radiolabeled with 111Indium-DTPA during one testing visit.
Participants will ingest 500 mL of mannitol solution at 325 mOsm/L radiolabeled with 111Indium-DTPA during one testing visit.
Scintigraphy will be used to track gastric emptying, small bowel transit, and colonic filling of the radiolabeled mannitol solution during each testing visit.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Peak Gastrointestinal Symptom Severity During Small Bowel Transit Following 76 mOsm/L Mannitol Solution Ingestion
Lasso di tempo: At baseline and at 15-minute intervals beginning 30 minutes after ingestion through 180 minutes post-ingestion.
Peak gastrointestinal symptom severity will be assessed using a 7-point Likert symptom scale after ingestion of radiolabeled mannitol solution. Symptoms assessed include abdominal pain or discomfort, nausea, bloating, distension, borborygmi, diarrhea, urgency, and related gastrointestinal symptoms. The peak symptom score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Scores range from 1 to 7, with higher scores indicating greater symptom severity.
At baseline and at 15-minute intervals beginning 30 minutes after ingestion through 180 minutes post-ingestion.
Peak Gastrointestinal Symptom Severity During Small Bowel Transit Following 189 mOsm/L Mannitol Solution Ingestion
Lasso di tempo: At baseline and at 15-minute intervals beginning 30 minutes after ingestion through 180 minutes post-ingestion.
Peak gastrointestinal symptom severity will be assessed using a 7-point Likert symptom scale after ingestion of radiolabeled mannitol solution. Symptoms assessed include abdominal pain or discomfort, nausea, bloating, distension, borborygmi, diarrhea, urgency, and related gastrointestinal symptoms. The peak symptom score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Scores range from 1 to 7, with higher scores indicating greater symptom severity.
At baseline and at 15-minute intervals beginning 30 minutes after ingestion through 180 minutes post-ingestion.
Peak Gastrointestinal Symptom Severity During Small Bowel Transit Following 325 mOsm/L Mannitol Solution Ingestion
Lasso di tempo: At baseline and at 15-minute intervals beginning 30 minutes after ingestion through 180 minutes post-ingestion.
Peak gastrointestinal symptom severity will be assessed using a 7-point Likert symptom scale after ingestion of radiolabeled mannitol solution. Symptoms assessed include abdominal pain or discomfort, nausea, bloating, distension, borborygmi, diarrhea, urgency, and related gastrointestinal symptoms. The peak symptom score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Scores range from 1 to 7, with higher scores indicating greater symptom severity.
At baseline and at 15-minute intervals beginning 30 minutes after ingestion through 180 minutes post-ingestion.

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Peak Abdominal Pain Intensity Following 76 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak abdominal pain intensity will be assessed after ingestion of 500 mL radiolabeled 76 mOsm/L mannitol solution using the Kohn Reactivity Scale. The peak pain intensity score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Higher scores indicate greater pain intensity.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak Abdominal Pain Intensity Following 189 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak abdominal pain intensity will be assessed after ingestion of 500 mL radiolabeled 189 mOsm/L mannitol solution using the Kohn Reactivity Scale. The peak pain intensity score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Higher scores indicate greater pain intensity.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak Abdominal Pain Intensity Following 325 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak abdominal pain intensity will be assessed after ingestion of 500 mL radiolabeled 325 mOsm/L mannitol solution using the Kohn Reactivity Scale. The peak pain intensity score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Higher scores indicate greater pain intensity.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak Abdominal Pain Unpleasantness Following 76 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak abdominal pain unpleasantness will be assessed after ingestion of 500 mL radiolabeled 76 mOsm/L mannitol solution using the Kohn Reactivity Scale. The peak pain unpleasantness score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Higher scores indicate greater pain unpleasantness.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak Abdominal Pain Unpleasantness Following 189 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak abdominal pain unpleasantness will be assessed after ingestion of 500 mL radiolabeled 189 mOsm/L mannitol solution using the Kohn Reactivity Scale. The peak pain unpleasantness score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Higher scores indicate greater pain unpleasantness.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak Abdominal Pain Unpleasantness Following 325 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Peak abdominal pain unpleasantness will be assessed after ingestion of 500 mL radiolabeled 325 mOsm/L mannitol solution using the Kohn Reactivity Scale. The peak pain unpleasantness score observed during the small bowel phase will be identified. The small bowel phase is defined as the period during which scintigraphy confirms radiolabeled solution in the small bowel and before more than 25% of tracer has reached the ascending colon. Higher scores indicate greater pain unpleasantness.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Change in Gastrointestinal Symptom Severity Following 76 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Gastrointestinal symptom severity will be assessed after ingestion of 500 mL radiolabeled 76 mOsm/L mannitol solution using a modified Gastric Symptom Severity Scale. Symptoms assessed include abdominal pain or discomfort, nausea, bloating, distension, borborygmi, diarrhea, loose stools, urgency, and related gastrointestinal symptoms. Scores range from 1 to 7, with higher scores indicating greater symptom severity.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Change in Gastrointestinal Symptom Severity Following 189 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Gastrointestinal symptom severity will be assessed after ingestion of 500 mL radiolabeled 189 mOsm/L mannitol solution using a modified Gastric Symptom Severity Scale. Symptoms assessed include abdominal pain or discomfort, nausea, bloating, distension, borborygmi, diarrhea, loose stools, urgency, and related gastrointestinal symptoms. Scores range from 1 to 7, with higher scores indicating greater symptom severity.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Change in Gastrointestinal Symptom Severity Following 325 mOsm/L Mannitol Solution
Lasso di tempo: Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion
Gastrointestinal symptom severity will be assessed after ingestion of 500 mL radiolabeled 325 mOsm/L mannitol solution using a modified Gastric Symptom Severity Scale. Symptoms assessed include abdominal pain or discomfort, nausea, bloating, distension, borborygmi, diarrhea, loose stools, urgency, and related gastrointestinal symptoms. Scores range from 1 to 7, with higher scores indicating greater symptom severity.
Baseline, then every 15 minutes from 30 minutes through 180 minutes after ingestion

Collaboratori e investigatori

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

Sponsor

Investigatori

  • Investigatore principale: Xiao Jing Wang, MD, Mayo Clinic

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)

24 agosto 2026

Completamento primario (Stimato)

30 giugno 2027

Completamento dello studio (Stimato)

30 dicembre 2027

Date di iscrizione allo studio

Primo inviato

8 settembre 2026

Primo inviato che soddisfa i criteri di controllo qualità

8 settembre 2026

Primo Inserito (Effettivo)

14 settembre 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

14 settembre 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

8 settembre 2026

Ultimo verificato

1 settembre 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • 25-013906

Piano per i dati dei singoli partecipanti (IPD)

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

NO

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

No

prodotto fabbricato ed esportato dagli Stati Uniti

No

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 .