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Linear vs. Circular Stapled Gastrojejunal Anastomosis in Bariatric Laparoscopic Gastric Bypass Surgery in Switzerland

NCT07483957 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 21375

Last updated 2026-03-19

No results posted yet for this study

Summary

Bariatric surgery has become one of the preferred options in treatment of severe obesity and its comorbidities in the Western world. In Switzerland, the approximate 5000 annual bariatric operations are performed exclusively in centres certified by the "Swiss Society of Study of Morbid Obesity and Metabolic Disorders (SMOB)". Among the different bariatric surgical procedures, the laparoscopic gastric bypass remains one of the most frequently performed operations. A critical step of this operation is the creation of the gastrojejunal anastomosis. This can be done using either a linear or a circular stapler. The optimal method continues to be discussed in current academic research. The linear anastomosis technique seems to be more feasible, uses smaller incisions and is therefore faster performed. The circular anastomosis technique benefits from a standardised diameter of the anastomosis with consecutive higher reproducibility. No difference in long-term weight loss have been described for these two techniques until today. The linear technique has been linked to marginal ulcers, while the circular technique has been associated with higher rates of stenosis and incisional hernia. The associations with other long-term adverse events such as internal hernias remain under discussion. However, according to several international analyses, the linear technique seems to have favourable short-term outcomes with shorter operation time and lower rates of wound complications and postoperative bleeding. Both techniques are used in Switzerland but Swiss national data on this topic is scarce. Given the high annual case volume of bariatric surgery in Switzerland and the inconsistent international evidence, a systematic comparison of these two techniques is of relevance.

This retrospective registry study provides Swiss national data on short-term postoperative outcomes after elective laparoscopic Roux-en-Y gastric bypass from 2015 to 2022. It aims to compare the linear vs. circular gastrojejunal anastomosis in terms of postoperative short-term postoperative, reoperation rate, and length of hospital stay.

Conditions

  • Bariatric Surgery (Gastric Bypass)

Interventions

PROCEDURE

Linear anastomosis

A linear stapled anastomosis was selected based on the Swiss Classification of Operations (CHOP) code 00.9A.13 or 00.9A.14.

PROCEDURE

Circular anastomosis

A circular stapled anastomosis was selected based on the Swiss Classification of Operations (CHOP) code 00.9A.11 or 00.9A.12.

Sponsors & Collaborators

  • Cantonal Hospital of St. Gallen

    lead OTHER

Eligibility

Min Age
20 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2015-01-01
Primary Completion
2022-12-31
Completion
2025-05-15

Countries

  • Switzerland

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07483957 on ClinicalTrials.gov