- ICH GCP
- Yhdysvaltain kliinisten tutkimusten rekisteri
- Kliininen tutkimus NCT07575295
A Randomized Controlled Trial Comparing Underwater Versus Conventional Preventive Coagulation for Intraprocedural Vessel Management During Peroral Endoscopic Myotomy (POEM)
Peroral Endoscopic Myotomy (POEM) has become an established, minimally invasive therapy for achalasia and esophageal motility disorders. Submucosal tunnelling is a critical phase of POEM and requires meticulous haemostasis to avoid bleeding, loss of orientation, reduced visibility, and prolonged procedural time.
The current standard method of vessel coagulation during POEM involves conventional coagulation under CO₂ insufflation using the hybrid knife (HK). However, this approach can require additional hemostatic devices-most commonly coagulation forceps-particularly when dealing with large-calibre vessels or resistant bleeding.
A novel technique-underwater preventive coagulation-leverages water as a conductive medium. Preliminary evidence suggests that:
- electrosurgical current in water is focalized at the interface of the vessel,
- allowing a soft sealing of the vessel wall,
- reducing the risk of vessel rupture or unintended deep thermal injury,
- and potentially eliminating the need to convert to coagulation forceps. Pilot data from our center demonstrate that underwater prophylactic sealing of large vessels during POEM is feasible, safe, and associated with markedly reduced need for rescue coagulation forceps. The technique is already used in practice but lacks systematic evidence from prospective randomized trials.
This study is designed to provide high-quality evidence on whether underwater vessel coagulation improves haemostatic efficiency, reduces intra-procedural bleeding, and minimizes device changes during POEM.
All POEM procedures will be performed under general anesthesia in the supine position using Fujifilm high-definition gastroscopes with a 2.8 mm channel and transparent distal cap.
Steps (Both Arms)
- Identify the esophagogastric junction (EGJ).
- Inject saline + methylene blue submucosally.
- Create a 2 cm mucosal incision at 5-6 o'clock position, 10 cm above EGJ.
- Enter the submucosal space.
- Perform submucosal tunnelling down to EGJ and 2-3 cm into cardia.
Perform vessel haemostasis according to group allocation:
- Underwater coagulation (intervention)
- CO₂-based conventional coagulation (control)
- Perform circular myotomy (with occasional full-thickness myotomy when indicated).
- Close the mucosal entry using hemostatic clips.
- Record procedure time, instrument exchanges, bleeding events, and forceps usage.
Equipment
- Hybrid Knife (Erbe Elektromedizin GmbH)
- VIO 3 generator + ERBEJet 2 water-jet system
- Methylene-blue tinted saline
- Electrosurgical settings: ENDO CUT Q 2-3-3 for mucosal incision and myotomy
Tutkimuksen yleiskatsaus
Tila
Interventio / Hoito
Yksityiskohtainen kuvaus
Primary Objective
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between:
1. Underwater preventive vessel coagulation, and 2. Conventional vessel coagulation under CO₂ insufflation. Secondary Objectives
- To compare composite forceps use (rescue + prophylactic) between groups.
- To evaluate the frequency of prophylactic-only forceps use.
- To compare total number of forceps applications per procedure.
- To determine differences in intra-procedural bleeding episodes.
- To compare procedural efficiency (procedure time, number of instrument exchanges).
- To compare hematological and inflammatory markers (Hb drop, Hct, CRP, WBC).
- To compare delayed bleeding rates within 30 days.
- To evaluate overall complication rates (intra- and post-procedural).
- To assess patient-reported outcomes (pain, tolerability). A prospective, randomized, open-label, parallel-group, controlled clinical trial.
Study Arms Intervention Arm: Underwater Coagulation
- Vessel coagulation performed entirely underwater using the Hybrid Knife.
- SWIFT COAG: E3 (89 W) for POEM.
- Physiological saline instilled to completely displace air around the target vessel.
Control Arm: Conventional Coagulation (CO₂ Setting)
- Standard vessel isolation and coagulation under CO₂ insufflation.
- SWIFT COAG: E3 (89 W) for POEM.
Opintotyyppi
Ilmoittautuminen (Arvioitu)
Yhteystiedot ja paikat
Opiskeluyhteys
- Nimi: Rajesh Goud Mr Maragoni, M.Pharm
- Puhelinnumero: 312 04023378888
- Sähköposti: rajeshgoud761@gmail.com
Tutki yhteystietojen varmuuskopiointi
- Nimi: Zaheer Nabi Dr Mohammed, MD DNB
- Puhelinnumero: 427 04023378888
- Sähköposti: zaheernabi1978@gmail.com
Opiskelupaikat
-
-
Telangana
-
Hyderabad, Telangana, Intia, 500082
- Rekrytointi
- Asian Institute of Gastroenterology Hospital
-
Ottaa yhteyttä:
- Mohan Ramchandani, MBBS
- Puhelinnumero: 802 04023378888
- Sähköposti: ramchandanimohan@gmail.com
-
Ottaa yhteyttä:
- Rajesh Goud Mr Maragoni, M.Pharm MBA
- Puhelinnumero: 301 04023378888
- Sähköposti: rajeshgoud761@gmail.com
-
-
Osallistumiskriteerit
Kelpoisuusvaatimukset
Opintokelpoiset iät
- Aikuinen
- Vanhempi Aikuinen
Hyväksyy terveitä vapaaehtoisia
Näytteenottomenetelmä
Tutkimusväestö
Kuvaus
Inclusion Criteria:
- Age ≥ 18 years
- Diagnosis of achalasia or esophageal motility disorder planned for POEM
- Ability to provide informed consent
Exclusion Criteria:
- Anticoagulant or antithrombotic therapy not safely stoppable
- Known coagulopathy or platelet disorder
- Esophageal/gastric varices
- Previous POEM or Heller's myotomy
- Prior treatment for same condition
- Inability or refusal to consent
- Visualized vessels smaller than the HK inner diameter (1.2 mm)
Opintosuunnitelma
Miten tutkimus on suunniteltu?
Suunnittelun yksityiskohdat
Kohortit ja interventiot
Ryhmä/Kohortti |
Interventio / Hoito |
|---|---|
|
Under Water Coagulation
Intervention Arm: Underwater Coagulation
|
Leverages water as a conductive medium. Preliminary evidence suggests that:
|
|
Conventional Coagulation
Control Arm: Conventional Coagulation (CO₂ Setting)
|
Mitä tutkimuksessa mitataan?
Ensisijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between:
Aikaikkuna: 60 minutes
|
|
60 minutes
|
Toissijaiset tulostoimenpiteet
Tulosmittaus |
Toimenpiteen kuvaus |
Aikaikkuna |
|---|---|---|
|
To compare composite forceps use (rescue + prophylactic) between groups.
Aikaikkuna: 60 minutes
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
60 minutes
|
|
To evaluate the frequency of prophylactic-only forceps use.
Aikaikkuna: 60 minutes
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
60 minutes
|
|
To compare total number of forceps applications per procedure.
Aikaikkuna: 60 minutes
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
60 minutes
|
|
To determine differences in intra-procedural bleeding episodes
Aikaikkuna: 60 minutes
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
60 minutes
|
|
To compare procedural efficiency (procedure time, number of instrument exchanges
Aikaikkuna: 60 minutes
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
60 minutes
|
|
To compare hematological and inflammatory markers (Hb drop, Hct, CRP, WBC)
Aikaikkuna: 24 hours
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
24 hours
|
|
To compare delayed bleeding rates
Aikaikkuna: 30 days
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between:1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation
|
30 days
|
|
To evaluate overall complication rates (intra- and post-procedural)
Aikaikkuna: 24 hours
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
24 hours
|
|
To assess patient-reported outcomes (pain, tolerability).
Aikaikkuna: 72 hours
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between: 1.Underwater preventive vessel coagulation, and Conventional vessel coagulation under CO₂ insufflation |
72 hours
|
Yhteistyökumppanit ja tutkijat
Tutkijat
- Opintojohtaja: Mohan Dr Ramchandani, MD DM, Asian Institute of Gastroenterology
Opintojen ennätyspäivät
Opi tärkeimmät päivämäärät
Opiskelun aloitus (Todellinen)
Ensisijainen valmistuminen (Arvioitu)
Opintojen valmistuminen (Arvioitu)
Opintoihin ilmoittautumispäivät
Ensimmäinen lähetetty
Ensimmäinen toimitettu, joka täytti QC-kriteerit
Ensimmäinen Lähetetty (Todellinen)
Tutkimustietojen päivitykset
Viimeisin päivitys julkaistu (Todellinen)
Viimeisin lähetetty päivitys, joka täytti QC-kriteerit
Viimeksi vahvistettu
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