Exploring the Efficacy of Single-stage Stapled Conversion of Gastric Bypass to Sleeve Gastrectomy, More Leak?

Kasr El Aini Hospital

Status: Enrolling

Conditions: the Focus of the Study is to Assees Efficacy of Stapled Revision of Gastric Bypass to Sleeve Gastrectomy

Treatments: Procedure: Stapled reversal of gastric bypass to sleeve gastrectomy utilising stapling technique.

Study type: Interventional

Funder types: Other

Identifiers

NCT07038148

N-8-2025

Details and patient eligibility

About

Laparoscopic gastric bypass - including both Roux-en-Y gastric bypass (RYGB) and one anastomosis gastric bypass (OAGB) - is one of the most frequently performed procedures. However, as the number of gastric bypass surgeries increases, complications are being reported more often. While most post-bypass complications can be managed non-surgically, a small number of persistent cases may require a reversal to normal anatomy or conversion to another procedure.

Many patients who experience severe complications from gastric bypass are reluctant to undergo a reversal to normal anatomy due to fears of regaining weight. As a result, converting to another type of surgery becomes a more logical alternative.

Complications requiring conversion are numerous and negatively affect the quality of life, such as retrograde intussusception, weight regain, intractable dumping syndrome, and nutritional deficiencies. The high cost of obligatory postoperative vitamins is a potential cause of conversion especially in low-income countries.

The conversion procedure is technically demanding and has a relatively higher rate of postoperative complications, making it less commonly performed. Additionally, limited data is available regarding the procedure and its long-term outcomes, making it an unexplored sea of hope for people who wish to manage intractable complications of gastric bypass and maintain weight loss.

Full description

Objectives: To study efficacy, safety, and patient outcomes following laparoscopic gastric bypass conversion to sleeve gastrectomy.

Study population & Sample size :

Adult patients undergoing single-stage laparoscopic stapled conversion of gastric bypass to sleeve gastrectomy in Kasr Alainy Sample size: 11 patients Study Design: This is a prospective single-arm clinical trial.

Methods: Patients who will attend our bariatric outpatient clinic will be enlisted according to inclusion criteria. A detailed history of anthropometric measures, chronic diseases, and previous surgeries will be recorded. After patient education, preoperative routine labs and imaging will be performed.

A preoperative 3D gastric volumetry CT scan will be performed to all patients included in this study.

The procedure will consist of converting the gastric bypass to a sleeve gastrectomy using a stapling technique.

The average length of hospital stay will be included. Follow up of nutritional status will be done using laboratory parameters (Hb, Ferritin, Vitamin D, Zn, Mg, serum Albumin, Calcium) in 3 months and 6 months postoperatively, quality of life will be assessed using bariatric quality of life index in 3 months and 6 months postoperatively.

Patient weight will be documented monthly to evaluate weight regain, GERD symptoms will be assessed using GERD score in 3 months and 6 months postoperatively.

Possible Risk (s) to study population:

1. Postoperative pain.
2. Postoperative nausea and vomiting.
3. Bleeding
4. Anastomotic leakage
5. Stricture

Outcome parameters:

• Primary outcomes

  1. Improvement of nutritional status.
  2. Weight regain.

• Secondary outcome parameters

  1. Quality of life
  2. GERD symptoms

Statistical analysis plan:

Data analysis packages will be SPSS version 21. Qualitative data will be presented by number and percentage, quantitative data will be presented by mean, standard deviation, median, and interquartile range.

Parametric and non-parametric tests of significant will be done (chi-square, student t-test, and Mann-Whitney test).

Correlation analysis tests and regression will be done. The level of significance was set at p equal to or below 0.05.

Enrollment: 11 estimated patients

Sex: All

Ages: 18 to 70 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Age between 18-70
• Adult patients undergoing single-stage laparoscopic stapled conversion of gastric bypass to sleeve gastrectomy.
• Patients accept to sign an informed consent and will commit to follow-up.

Exclusion criteria

• Patients with reversal gastric bypass to normal anatomy.
• Patient with uncontrolled systemic disease.
• Patients with active psychological disorders.
• Patients with active substance abuse.
• Patients with intra-operative technical difficulties hindering the conversion of gastric bypass to sleeve gastrectomy.
• Patients refusing to sign an informed consent.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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11 participants in 1 patient group

Candidates of several of bypass to sleeve

Experimental group

Description:

This interventional study with a single arm assesses the effectiveness and safety of converting gastric bypass to sleeve gastrectomy using a laparoscopic stapling technique in adults who have complications from earlier gastric bypass procedures. The approach entails closing the prior gastrojejunostomy and performing a sleeve gastrectomy with a stapling method. The outcomes measured will include enhancements in nutritional status, weight regain, quality of life, and symptoms of GERD over a follow-up period of 6 months.

Treatment:

Procedure: Stapled reversal of gastric bypass to sleeve gastrectomy utilising stapling technique.