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Life sciences · Interventional Study
ClinicalTrials.gov · September 24, 2026
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Interventional Study.
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Registry record from ClinicalTrials.gov (NCT04433338). This is a study registration, not published results. Lead sponsor: Rijnstate Hospital. Recruitment status: ACTIVE_NOT_RECRUITING. Phase: NA. Study type: INTERVENTIONAL. Enrollment: 80 participants (ESTIMATED). Conditions: Bariatric Surgery, Morbid Obesity. Interventions: OTHER: 14-day Low Calorie Diet. Primary outcome measures: Operative time of the RYGB procedure , surgery. Brief summary: Bariatric guidelines recommend preoperative weight loss of 5% to reduce the risk of surgical complications. However, results in the literature on the improvement of surgical procedure and outcomes are still conflicting. This study aims to evaluate the effect of preoperative weight loss by means of a 14-day low-calorie diet in bariatric patients on operative time, the ease of the Roux-en-Y gastric bypass (RYGB) procedure and long-term weight loss in a real-life experimental setting.