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Updated: Feb 8, 2026
11:58
A Protocol for Roux-en-Y Gastric Bypass in Rats using Linear Staplers
Published on: August 21, 2021
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NON-INVASIVE PREVENTIVE VENTILATION WITH TWO PRESSURE LEVELS IN THE POSTOPERATIVE PERIOD OF ROUX-EN-Y GASTRIC BYPASS:
Mabelle Gomes de Oliveira Cavalcanti1, Lívia Barboza Andrade1, Patrícia Clara Pereira Dos Santos1
1Institute of Integral Medicine Prof. Fernando Figueira, Recife, Brazil.
Summary
Non-invasive ventilation improved respiratory function and reduced complications in obese adults after gastric bypass surgery. This strategy offers a faster recovery and fewer adverse events for patients.
Area of Science:
- Bariatric Surgery
- Pulmonary Medicine
- Critical Care
Background:
- Obesity leads to excessive fat accumulation, impairing health and causing breathing difficulties.
- Roux-en-Y gastric bypass is a common bariatric surgery procedure.
- Postoperative respiratory complications are a concern in obese patients undergoing bariatric surgery.
Purpose of the Study:
- To evaluate non-invasive ventilation (NIV) as a preventive method against respiratory function decline.
- To assess the impact of NIV on postoperative complications in patients undergoing Roux-en-Y gastric bypass.
- To compare outcomes between NIV and standard care in this patient population.
Main Methods:
- A randomized controlled trial adhering to CONSORT standards.
- Inclusion of obese adults aged 18-40 years.
- Intervention group received NIV (two pressure levels, 60 min/day) from postoperative day 1-3; control group received standard care (posture, ambulation, cough stimuli).
- Respiratory function (VC, IC, MV, Pimax, PEF) and complications were assessed preoperatively and on postoperative days 1 and 3.
Main Results:
- The NIV group showed improvements in inspiratory capacity (IC) and peak expiratory flow (PEF) by postoperative day 3.
- Pneumonia and atelectasis occurred significantly less frequently in the NIV group compared to the control group.
- Hospitalization and ICU stays were comparable between the groups.
Conclusions:
- Non-invasive ventilation facilitates faster recovery of IC and PEF up to postoperative day 3.
- NIV significantly reduces the incidence of postoperative complications, particularly pneumonia and atelectasis.
- NIV is a beneficial preventive strategy for respiratory health in obese patients undergoing Roux-en-Y gastric bypass.
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