- ICH GCP
- Registr klinických studií v USA
- Klinická studie 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
Přehled studie
Postavení
Podmínky
Intervence / Léčba
Detailní popis
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.
Typ studie
Zápis (Odhadovaný)
Kontakty a umístění
Studijní kontakt
- Jméno: Rajesh Goud Mr Maragoni, M.Pharm
- Telefonní číslo: 312 04023378888
- E-mail: rajeshgoud761@gmail.com
Studijní záloha kontaktů
- Jméno: Zaheer Nabi Dr Mohammed, MD DNB
- Telefonní číslo: 427 04023378888
- E-mail: zaheernabi1978@gmail.com
Studijní místa
-
-
Telangana
-
Hyderabad, Telangana, Indie, 500082
- Nábor
- Asian Institute of Gastroenterology Hospital
-
Kontakt:
- Mohan Ramchandani, MBBS
- Telefonní číslo: 802 04023378888
- E-mail: ramchandanimohan@gmail.com
-
Kontakt:
- Rajesh Goud Mr Maragoni, M.Pharm MBA
- Telefonní číslo: 301 04023378888
- E-mail: rajeshgoud761@gmail.com
-
-
Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
- Dospělý
- Starší dospělý
Přijímá zdravé dobrovolníky
Metoda odběru vzorků
Studijní populace
Popis
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)
Studijní plán
Jak je studie koncipována?
Detaily designu
Kohorty a intervence
Skupina / kohorta |
Intervence / Léčba |
|---|---|
|
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)
|
Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
To compare the proportion of POEM patients requiring rescue haemostasis with coagulation forceps (for active bleeding) between:
Časové okno: 60 minutes
|
|
60 minutes
|
Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
To compare composite forceps use (rescue + prophylactic) between groups.
Časové okno: 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.
Časové okno: 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.
Časové okno: 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
Časové okno: 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
Časové okno: 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)
Časové okno: 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
Časové okno: 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)
Časové okno: 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).
Časové okno: 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
|
Spolupracovníci a vyšetřovatelé
Vyšetřovatelé
- Ředitel studie: Mohan Dr Ramchandani, MD DM, Asian Institute Of Gastroenterology
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Aktuální)
Primární dokončení (Odhadovaný)
Dokončení studie (Odhadovaný)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
Další identifikační čísla studie
- POEM UWC 2026
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