An update on sleeve gastrectomy

Area of Science:

• Bariatric surgery
• Obesity management
• Metabolic and endocrine disease

Background:

• Laparoscopic sleeve gastrectomy (LSG) is increasingly used as a definitive bariatric procedure.
• Its short-term outcomes and technical simplicity contribute to its growing popularity.
• LSG is also employed as a first stage for superobese patients undergoing biliopancreatic diversion with duodenal switch or laparoscopic Roux-en-Y gastric bypass (LRYGB).

Purpose of the Study:

• To evaluate the current evidence on Laparoscopic sleeve gastrectomy (LSG) as a definitive bariatric procedure.
• To assess the long-term effectiveness of LSG compared to LRYGB for weight loss and comorbidity resolution.
• To identify gaps in the evidence regarding LSG standardization and mechanisms of action.

Main Methods:

• A comprehensive PubMed literature search was conducted, identifying over 2000 abstracts.
• 74 relevant original articles were selected for secondary analysis.
• The review focused on weight loss, comorbidity resolution, quality of life, and procedural standardization.

Main Results:

• The evidence base for LSG as a stand-alone procedure for morbid obesity is currently of low quality and quantity.
• Significant variability exists in surgical techniques and standardization among bariatric surgeons.
• The mechanisms driving LSG's metabolic benefits and weight loss remain incompletely understood.
• Long-term comparative effectiveness data, particularly versus LRYGB, are critically lacking.

Conclusions:

• Current evidence does not support recommending LSG as a definitive, stand-alone procedure for morbid obesity.
• Methodologically sound, randomized controlled trials are needed to determine long-term outcomes.
• Further research should focus on standardizing LSG techniques and elucidating its metabolic effects.