Clinical trial Recruiting at 1 site Interventional Ages 18 to 65

ERCG (clip-and-loop endoscopic gastric reduction) versus optimized lifestyle for weight loss

Official title: iWAIST Trial: A Multicenter, Single-Blind, Randomized, Sham-Controlled Trial of Endoscopic Radial Compression Gastroplasty (ERCG) Plus Optimized Lifestyle Intervention for Weight Management in Chinese Adults With Overweight or Mild-to-Moderate Obesity

Run by Beijing 302 Hospital · NCT07237750 · Data updated 2026-11-12

This trial will test whether ERCG, a sutureless endoscopic clip-and-loop procedure that reduces stomach volume, helps Chinese adults with BMI 24.0–37.4 kg/m² lose more weight than an optimized lifestyle program.

Quick facts

Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment216 (estimated)
SponsorBeijing 302 Hospital
Academic / other
Locations2 sites (Beijing, Beijing Municipality and 1 other locations)
StatusRecruiting
StartedMarch 13, 2026
Main results expectedMarch 30, 2027
Study endsJune 30, 2027
Registry record updatedOctober 26, 2026
Trial IDNCT07237750 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Asian adults aged 18–65 years with BMI 24.0–37.4 kg/m² who have failed prior conservative weight-loss attempts and can comply with follow-up are ideal candidates.

Probably not a fit

People with significant upper gastrointestinal disease or prior GI surgery with sequelae, large hiatal hernia or severe refractory GERD, severe coagulopathy, or other listed exclusion conditions are unlikely to benefit from ERCG in this trial.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This randomized controlled trial will assign eligible Asian adults (BMI 24.0–37.4 kg/m²) 1:1 to either Endoscopic Radial Compression Gastroplasty (ERCG) or an optimized lifestyle intervention. ERCG is a sutureless endoscopic procedure that apposes gastric walls using a clip-and-loop system and is performed under general anesthesia or deep sedation. The primary endpoint is percent total body weight loss (TBWL) at 3 months, with additional safety and metabolic outcomes tracked over follow-up. Early pilot data suggest rapid weight loss after ERCG, but larger randomized data in this population are needed.

Why it matters

Potential benefit: If successful, ERCG could offer a less invasive option than surgery that produces rapid, clinically meaningful weight loss in adults with mild-to-moderate obesity.

How similar studies have gone: Early, small studies of ERCG and other endoscopic bariatric therapies have reported rapid weight loss (about 12% TBWL at 3 months) but larger randomized evidence remains limited.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Asian adults aged 18-65 years.
* BMI 24.0-27.9 with ≥ 1 obesity-related complication
* BMI 28.0-37.4kg/m²
* Failed prior conservative weight loss attempts
* Willingness to comply with follow-up.
* Provided written informed consent.

Exclusion Criteria:

* Prior gastrointestinal surgery with clinically relevant sequelae.
* Active or clinically significant gastrointestinal disease, including inflammatory conditions (e.g., esophagitis, Barrett's esophagus, Crohn's disease), peptic ulcer disease (gastric/duodenal ulcer), or neoplastic lesions.
* Any condition associated with an increased risk of upper gastrointestinal bleeding.
* Hiatal hernia \>2 cm or severe/refractory gastroesophageal reflux disease (GERD); acid reflux requiring ≥2 medications for symptom control.
* Esophageal/pharyngeal structural abnormalities that may impede endoscope passage (e.g., stricture, diverticulum).
* Achalasia or other severe esophageal motility disorder.
* Severe coagulopathy.
* Insulin-dependent diabetes mellitus.
* Chronic abdominal pain.
* Gastrointestinal motility disorder (e.g., gastroparesis).
* Hepatic impairment or cirrhosis.
* Severe or uncontrolled psychiatric illness.
* Alcohol abuse or substance dependence.
* Unwilling to participate in a physician-supervised diet/behavior modification program and/or unwilling to comply with routine follow-up.
* Daily regular use of NSAIDs, anticoagulants, or other gastric-irritating medications.
* Unable or unwilling to take proton pump inhibitor (PPI) therapy as prescribed during the treatment period.
* Known or suspected hypersensitivity to any material/component of the study system.
* Pregnant or breastfeeding.
* Severe cardiopulmonary disease or other serious systemic/organic disease.
* Active infection not successfully eradicated before enrolment.
* Use of time-critical medications potentially affected by altered gastric emptying (e.g., antiepileptics, antiarrhythmics).
* Current systemic corticosteroids, immunosuppressants, or opioid analgesics.
* Use of any weight-loss medication within the past 3 months or current use.
* Prior use of any intragastric device.
* Participation in a weight-affecting clinical trial within the past 6 months.
* Symptomatic congestive heart failure, clinically significant arrhythmia, or unstable coronary artery disease.
* Clinically significant respiratory disease.
* Autoimmune connective tissue disease.
* Life expectancy \<1 year or severe renal/hepatic/pulmonary or other serious medical illness.
* Known genetic or endocrine cause of obesity (e.g., hypothyroidism, Prader-Willi syndrome) or other endocrine disease known to affect body weight.
* Eating disorder (e.g., night eating syndrome, bulimia nervosa, binge eating disorder, compulsive eating).

Where it's running

  • The fifth Medical Center of Chinese PLA General Hospital, Beijing
    Beijing, Beijing Municipality, China
    Recruiting
  • The fifth Medical Center of Chinese PLA General Hospital, Beijing
    Beijing, Beijing Municipality, China
    Not yet recruiting

Study contacts

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How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.