ClinicalTrials.gg
WithdrawnNCT04762849MEMORINGUpdated May 15, 2023

A Banded One Anastomosis Gastric Bypass With Use Shape-memory Ring Versus Non-banded One Anastomosis Gastric Bypass

An interventional study of Laparoscopic one anastomosis gastric bypass and A shape-memory ring for adjustable gastric banding in Obesity, sponsored by University Medical Center, Kazakhstan. Withdrawn at 1 site in Kazakhstan. Open to participants aged 18 Years to 60 Years. Per ClinicalTrials.gov, last updated 2023-05-15.

Sponsored by University Medical Center, Kazakhstan · Not applicable, Interventional, and Treatment

Why this study was withdrawn
No Participants Enrolled
Phase
Not applicable
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years to 60 Years
Sex
All
01

Study summary

Background and study aims:

Currently, the gastric bypass is increasingly performed in the version of the mini gastric bypass (MGB). Another name for the procedure: one anastomosis gastric bypass (OAGB). Insufficient weight loss after bariatric surgery or weight gain after surgery is a common big problem in weight loss surgery.

The use of unregulated and uncontrolled bands and rings is not always effective according to previous studies.

This study compares the loss of weight after the laparoscopic banded one anastomosis gastric bypass with the use of a shape-memory ring and standard laparoscopic one anastomosis gastric bypass.

Methods: Adult participants (n=100) are randomly allocated to one of two groups:

Experimental surgical bariatric procedure in the first (A) group: patients (n=50) will undergo the laparoscopic banded one anastomosis gastric bypass with use of a shape-memory ring (MGB/OAGB+SMR group); Active comparator surgical bariatric procedure in the second (B) group: patients (n=50) will undergo the laparoscopic one anastomosis gastric bypass (MGB/OAGB group) without band: standard surgery.

All patients are then followed up 12, 24, 36 months after surgery where record the changing body mass index.

Read the detailed description

This study compares the loss of weight after the laparoscopic banded one anastomosis gastric bypass with the use of a shape-memory ring and standard laparoscopic one anastomosis gastric bypass.

Inclusion Criteria:

  • BMI from 30 to 50 kg / m2;
  • Ages Eligible for Study: 18 Years to 55 Years

Outcome Measures: Change of body mass index [ Time Frame: Baseline, at 12, 24, 36 months after surgery ]

02

Conditions studied

  • Obesity

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Keywords

  • Obesity
  • Bariatric surgery
  • Ring with shape memory
  • One anastomosis gastric bypass
03

In context

Obesity

11,522 studies on the registry are indexed under Obesity; 2,033 are open to participants now.

Browse Obesity studies →

Lead sponsor

University Medical Center, Kazakhstan is the lead sponsor of 7 studies on the registry; 2 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 60 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Clinical diagnosis of Obesity;
  2. from 30 to 50 kg / m2.

Exclusion criteria

Exclusion Criteria:

  1. Insulin-dependent diabetes;
  2. less than 30 kg / m2 and more than 50 kg / m2.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

BMI (body mass index)

Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.

What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.

05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    laparoscopic banded one anastomosis gastric bypass with use of a shape-memory ring (MGB/OAGB+SMR)

    Laparoscopic banded one anastomosis gastric bypass with use of a shape-memory ring (MGB/OAGB+SMR) include the creation of a gastric pouch; a jejunal loop measure about 200 cm from the ligament of Treitz and anastomosed to the gastric pouch. A ring with shape memory put on the gastric pouch

    Procedure: Laparoscopic one anastomosis gastric bypass · Device: A shape-memory ring for adjustable gastric banding

  • Active comparator
    laparoscopic one anastomosis gastric bypass (MGB/OAGB) without band: standard surgery

    Laparoscopic one anastomosis gastric bypass (MGB/OAGB) include the creation of a gastric pouch; a jejunal loop measure about 200 cm from the ligament of Treitz and anastomosed to the gastric pouch.

    Procedure: Laparoscopic one anastomosis gastric bypass

Interventions

  • ProcedureLaparoscopic one anastomosis gastric bypass

    Laparoscopic one anastomosis gastric bypass include the creation of gastric pouch; a jejunal loop measure about 200 cm from the ligament of Treitz and anastomosed to the gastric pouch. For the creation of a gastric pouch and gastroenterostomy use a linear stapler.

  • DeviceA shape-memory ring for adjustable gastric banding

    A shape-memory ring (SMR) use for adjustable gastric banding. SMR is placed around the gastric pouch above the gastro-entero-anastomosis.

06

What researchers measure

Primary outcomes

  1. Change of body mass index

    The measure is assessing a change of body mass index. Weight (kg) and height (cm) will be combined with the report of measurement by body mass index (BMI) kg/m2.

    Time frame: Baseline, at 12, 24, 36 months after surgery

07

Study locations

1 site
  • University medical center
    Astana, 010000, Kazakhstan
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Apr 2021 (actual). Primary completion is estimated for Apr 2024, 36 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 14, 2021
First posted
Feb 21, 2021
StartActual
Apr 1, 2021
Primary completionEst.
Apr 1, 2024
CompletionEst.
May 1, 2024
Last update
May 15, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 15, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04762849
Lead sponsor
University Medical Center, Kazakhstan
Responsible party
Oral Ospanov (Professor Oral Ospanov, University Medical Center, Kazakhstan) — Principal investigator
First posted
Feb 21, 2021
Start date
Apr 1, 2021
Primary completion
Apr 1, 2024 (estimated)
Completion
May 1, 2024 (estimated)
Last update
May 15, 2023

Study contacts

Oral Ospanov, Professor
principal investigator · Corporate Foundation "University Medical Center" (UMC)

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in May 2023. You cannot join it, but the record below documents what was studied.

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