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ObesityNCT05864911

Efficacy and Safety of the Gastric Bypass Stent System on Body Weight and Metabolic Parameters in Obese Patients

A study testing the Gastric Bypass Stent System in people with Obesity, run by Beijing Friendship Hospital at 1 site in China.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

In this study, the investigators use a novel endoscopic duodenal-jejunal bypass liner-the Gastric Bypass Stent System (Hangzhou Tangji Medical Technology Co., Ltd., China) for the treatment of obesity. Read more about this study

Who is it for?
Ages 18 to 60 years
Conditions the study is for
Obesity
What is being tested?
the Gastric Bypass Stent System
Type of treatment
Medical device
Could I receive a placebo?
No, everyone receives an active treatment
How many people
14 participants
Where
1 siteChina
Study dates
11 Mar 2021to 3 Oct 2022
Phase
Interventional
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 60 years
  • All sexes
  • No healthy volunteers
  • Adult

Who may be able to join

  • Age ≥18 and ≤60 years;
  • Body mass index ( BMI) ≥30 kg/m2;
  • American Society of Anesthesiologists( ASA) Physical Status Classification System:I-II.

Who cannot join

  • Weight loss of more than 4.5 kg in the past three months, or taking weight-lowering drugs in the past month;
  • Taking non-steroidal anti-inflammatory drugs (NSAIDs) or antiplatelet drugs or anticoagulant therapy in the past month;
  • Previous diagnosis with type 1 diabetes mellitus;
  • Loss of islet β-cell function, C-peptide ≤ 1/2 of the normal low limit, or low C-peptide release curve under glucose load;
  • Iron deficiency or iron deficiency anemia;
  • Severe organ dysfunction of the heart, the lung, the liver or the kidney;
Show all 14Show fewer
  • Patients who have undergone endoscopic retrograde cholangiopancreatography, or have a history of cholecystitis, gallstones with clinical symptoms or stones larger than 20 mm in diameter; pancreatitis or hepatic abscess;
  • History of duodenal ulcer or gastric ulcer;
  • Patients with gastrointestinal bleeding or potential bleeding;
  • Digestive tract malformation, such as digestive tract atresia or previous gastrointestinal surgery that could cause failure of implantation or affect functioning of the device;
  • History of intestinal obstruction in the past year;
  • Thyroid dysfunction;
  • History of systemic lupus erythematosus or scleroderma;
  • Pregnant women or women desiring pregnancy in the next few months.

Trial locations and contacts

1 site in 1 country.

China1 site
  • Beijing Friendship Hospital

    Beijing, Beijing Municipality, 100050

Other trials in China

About this study

In this study, the investigators use a novel endoscopic duodenal-jejunal bypass liner-the Gastric Bypass Stent System (Hangzhou Tangji Medical Technology Co., Ltd., China) for the treatment of obesity. The aim of this study is to evaluate the efficacy and safety of this new device on weight loss and obesity-associated metabolic parameters.

Read the detailed description

This is a prospective, open-label, single-arm study conducted at the department of gastroenterology, Beijing Friendship Hospital, Capital Medical University in China. In this study, all the participants were implanted with the Gastric Bypass Stent System. The device had an intended implantation time of 12 weeks, and the participants were followed up for 24 weeks. Both the implantation and explantation were conducted under general anesthesia. A liquid diet was required for a week after implantation to reduce the risk of early obstruction or migration. All the participants received an oral proton pump inhibitor twice daily during the implantation and within 4 weeks of removal. Primary outcomes were changes in excess weight loss and total weight loss at 12 and 24 weeks. Secondary outcomes included changes in body weight, body mass index (BMI), insulin resistance, liver enzymes, lipids and uric acid at 12 and 24 weeks, and device safety. At the first visit, baseline demographics, medical history, physical examination and laboratory tests were collected. The subjects were scheduled for follow-up visit at 1, 4, 12, 16 and 24 weeks. At each visit, body weight was measured and symptoms were recorded. Blood and fecal samples were collected to observe the changes of metabolic parameters and also to monitor the adverse effects. A complete blood count, liver function, blood glucose, insulin, HbA1C, lipids, uric acid, amylase, iron tests and fecal occult blood were partially or all measured at each visit. Insulin resistance was assessed by the homeostasis model assessment of insulin resistance (HOMA-IR), a value ≧2.69 was considered as insulin resistance. Elevated ALT or AST was considered as abnormal liver enzymes. Primary outcomes were changes in EWL and TWL at 12 and 24 weeks. Secondary outcomes included changes in body weight, BMI, insulin resistance, liver enzymes, lipids, UA at 12 and 24 weeks, and device safety.Analyses were conducted with IBM SPSS Statistics for Windows, version 22.0 (IBM Corporation , Armonk, NY). Data was reported as mean ± standard deviation (SD) . A p value of <0.05 was considered statistically significant. Analyses of body weight changes between different time points were conducted with a paired sample t test. Analyses of metabolic parameters in the blood were calculated by generalized estimating equations (GEE) because of the existence of missing values.

Conditions
Obesity
Being tested
the Gastric Bypass Stent System
Keywords
The Gastric Bypass Stent System, total weight loss, excess weight loss, obesity
Medical subject headings
Obesity

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • the Gastric Bypass Stent SystemDevice

    The Gastric Bypass Stent System is a newly designed endoscopic duodenal-jejunal bypass liner for the treatment of obesity by Hangzhou Tangji Medical Technology Co., Ltd.. It consists of three main parts: a 60-cm polyethylene sleeve fixed into the duodenal bulb by anchors with barbs, a delivery system and a retrieval system. Compared to the Endobarrier, it has several technical adjustments. First, it improved sleeve materials to provide better barrier properties and reduce the breeding of bacteria resulting in hepatic abscess. Second, the barbs on the anchoring system have been modified to reduce duodenal injury. Third, the delivery and retrieval system have been optimized to eliminate the need of fluoroscopic guidance during implantation and explantation.

Study groups in NCT05864911
Study groupRoleWhat they receive
the Gastric Bypass Stent System groupExperimentalall the participants were implanted with the Gastric Bypass Stent System for 12 weeks and followed up for 24 weeks.
Receives: Device: the Gastric Bypass Stent System

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change from baseline excess weight loss at 4 weeks

    excess weight loss change

    Measured: 4 weeks

  2. Change from baseline excess weight loss at 12 weeks

    excess weight loss change

    Measured: 12 weeks

  3. Change from baseline excess weight loss at 24 weeks

    excess weight loss change

    Measured: 24 weeks

  4. Change from baseline total weight loss at 4 weeks

    total weight loss change

    Measured: 4 weeks

  5. Change from baseline total weight loss at 12 weeks

    total weight loss change

    Measured: 12 weeks

  6. Change from baseline total weight loss at 24 weeks

    total weight loss change

    Measured: 24 weeks

  7. Number of participants with treatment-related adverse events as assessed by CTCAE v4.0

    Number of participants with treatment-related adverse events to assess device safety

    Measured: within 24 weeks

Secondary outcomes (30)
  1. Change from baseline body weight at 4 weeks

    body weight change

    Measured: 4 weeks

  2. Change from baseline body weight at 12 weeks

    body weight change

    Measured: 12 weeks

  3. Change from baseline body weight at 24 weeks

    body weight change

    Measured: 24 weeks

  4. Change from baseline body mass index at 4 weeks

    body mass index change

    Measured: 4 weeks

  5. Change from baseline body mass index at 12 weeks

    body mass index change

    Measured: 12 weeks

  6. Change from baseline body mass index at 24 weeks

    body mass index change

    Measured: 24 weeks

  7. Value change of homeostasis model assessment of insulin resistance at 4 weeks compared with baseline

    the homeostasis model assessment of insulin resistance were calculated by [fasting insulin level (uU/mL)]×[fasting glucose level (mmol/L)]/22.5

    Measured: 4 weeks

  8. Value change of homeostasis model assessment of insulin resistance at 12 weeks compared with baseline

    the homeostasis model assessment of insulin resistance were calculated by [fasting insulin level (uU/mL)]×[fasting glucose level (mmol/L)]/22.5

    Measured: 12 weeks

  9. Value change of homeostasis model assessment of insulin resistance at 24 weeks compared with baseline

    the homeostasis model assessment of insulin resistance were calculated by [fasting insulin level (uU/mL)]×[fasting glucose level (mmol/L)]/22.5

    Measured: 24 weeks

  10. Value change of alanine aminotransferase at 4 weeks compared with baseline

    value change of alanine aminotransferase

    Measured: 4 weeks

  11. Value change of alanine aminotransferase at 12 weeks compared with baseline

    value change of alanine aminotransferase

    Measured: 12 weeks

  12. Value change of alanine aminotransferase at 24 weeks compared with baseline

    value change of alanine aminotransferase

    Measured: 24 weeks

  13. Value change of aspartate aminotransferase at 4 weeks compared with baseline

    value change of aspartate aminotransferase

    Measured: 4 weeks

  14. Value change of aspartate aminotransferase at 12 weeks compared with baseline

    value change of aspartate aminotransferase

    Measured: 12 weeks

  15. Value change of aspartate aminotransferase at 24 weeks compared with baseline

    value change of aspartate aminotransferase

    Measured: 24 weeks

  16. Value change of total cholesterol at 4 weeks compared with baseline

    value change of total cholesterol

    Measured: 4 weeks

  17. Value change of total cholesterol at 12 weeks compared with baseline

    value change of total cholesterol

    Measured: 12 weeks

  18. Value change of total cholesterol at 24 weeks compared with baseline

    value change of total cholesterol

    Measured: 24 weeks

  19. Value change of low density lipoprotein cholesterol at 4 weeks compared with baseline

    value change of low density lipoprotein cholesterol

    Measured: 4 weeks

  20. Value change of low density lipoprotein cholesterol at 12 weeks compared with baseline

    value change of low density lipoprotein cholesterol

    Measured: 12 weeks

  21. Value change of low density lipoprotein cholesterol at 24 weeks compared with baseline

    value change of low density lipoprotein cholesterol

    Measured: 24 weeks

  22. Value change of high density lipoprotein cholesterol at 4 weeks compared with baseline

    value change of high density lipoprotein cholesterol

    Measured: 4 weeks

  23. Value change of high density lipoprotein cholesterol at 12 weeks compared with baseline

    value change of high density lipoprotein cholesterol

    Measured: 12 weeks

  24. Value change of high density lipoprotein cholesterol at 24 weeks compared with baseline

    value change of high density lipoprotein cholesterol

    Measured: 24 weeks

  25. Value change of triglyceride at 4 weeks compared with baseline

    value change of triglyceride

    Measured: 4 weeks

  26. Value change of triglyceride at 12 weeks compared with baseline

    value change of triglyceride

    Measured: 12 weeks

  27. Value change of triglyceride at 24 weeks compared with baseline

    value change of triglyceride

    Measured: 24 weeks

  28. Value change of blood uric acid at 4 weeks compared with baseline

    value change of blood uric acid

    Measured: 4 weeks

  29. Value change of blood uric acid at 12 weeks compared with baseline

    value change of blood uric acid

    Measured: 12 weeks

  30. Value change of blood uric acid at 24 weeks compared with baseline

    value change of blood uric acid

    Measured: 24 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 May 2023
  2. Study start11 Mar 2021
  3. Primary completion3 Oct 2022
  4. Study completion3 Oct 2022

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Model description
placement of the Gastric Bypass Stent System
Masking
None (open label)
Enrolment
14 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT05864911
Sponsor's protocol ID
BeijingFH20230327
Status last verified
Apr 2023
First submitted
3 Apr 2023
Last updated
18 May 2023
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Yes: The baseline demographics, the body weight changes,blood and fecal tests at each visit and the adverse effects will be available.

Publications

  • Wang L, Zhou B, Zhao Z, Yang L, Zhang M, Jiang Y, Li Y, Zhou M, Wang L, Huang Z, Zhang X, Zhao L, Yu D, Li C, Ezzati M, Chen Z, Wu J, Ding G, Li X. Body-mass index and obesity in urban and rural China: findings from consecutive nationally representative surveys during 2004-18. Lancet. 2021 Jul 3;398(10294):53-63. doi: 10.1016/S0140-6736(21)00798-4.

    PubMed 34217401
  • India State-Level Disease Burden Initiative CVD Collaborators. The changing patterns of cardiovascular diseases and their risk factors in the states of India: the Global Burden of Disease Study 1990-2016. Lancet Glob Health. 2018 Dec;6(12):e1339-e1351. doi: 10.1016/S2214-109X(18)30407-8. Epub 2018 Sep 12.

    PubMed 30219317
  • Ren M, Zhou X, Yu M, Cao Y, Xu C, Yu C, Ji F. Prospective study of a new endoscopic duodenal-jejunal bypass sleeve in obese patients with nonalcoholic fatty liver disease (with video). Dig Endosc. 2023 Jan;35(1):58-66. doi: 10.1111/den.14409. Epub 2022 Aug 23.

    PubMed 35869797

Questions about this trial

What is this clinical trial studying?

A study testing the Gastric Bypass Stent System in people with Obesity, run by Beijing Friendship Hospital at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 14 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 18 May 2023. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change from baseline excess weight loss at 4 weeks (time frame: 4 weeks). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT05864911, which also lists 3 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 May 2023.

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