Background <p>Despite widespread use of Roux-en-Y gastric bypass (RYGB), there are no standardized limb lengths in the United States.</p> Methods <p>A multi-center retrospective cohort study was conducted from 2020 to 2023. Eligible patients who had undergone RYGB were divided into subgroups based on BP limb lengths: short (50–75&#xa0;cm), intermediate (80–125&#xa0;cm), and long (150–175&#xa0;cm). Primary outcomes were total weight loss (TWL) and % TWL at 1 and 2&#xa0;years. Secondary outcomes were post-operative BMI and % BMI change at 1 and 2&#xa0;years, micronutrient deficiencies, hypothyroidism, acute kidney injury (AKI) requiring treatment, and remission in associated medical problems. Subgroups were compared using multivariate analysis.</p> Results <p>Two hundred twenty-eight patients received a long BP limb, 194 patients received an intermediate BP limb, while 152 patients received a short BP limb. Primary outcomes TWL and % TWL were significantly different between the groups at 1&#xa0;year: TWL and % TWL were greater in patients with long BP limbs. The difference between the long and short BP limb groups increased at the 2-year mark. Patients who had long BP limbs had higher rates of DM remission (12.3% vs 11.9% 6.6%), HTN (8.8% vs 5.7% vs 7.9%), GERD symptoms (14.5% vs 9.8% vs 5.3%), and OSA (8.8% vs 7.7% vs 5.3%). Vitamin A deficiency rates were higher in the long BP limb group.</p> Conclusions <p>The results suggest that longer BP limb lengths are conducive to TWL and overall treatment of obesity-related problems without severe rates of complications. Additional longer longitudinal studies are needed to assess the impact of long BP limbs on nutrition and weight loss in the long term.</p>

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Enhanced Total Weight Loss 2 Years Post-Roux-en-Y Gastric Bypass with Longer Biliopancreatic Limb

  • Miya C. Yoshida,
  • Diana Luong,
  • Sally Tan,
  • Jennifer Pan,
  • Jonathan Luu,
  • Owen Pyke,
  • Venkata Kella,
  • Collin E. M. Brathwaite,
  • Jun Levine

摘要

Background

Despite widespread use of Roux-en-Y gastric bypass (RYGB), there are no standardized limb lengths in the United States.

Methods

A multi-center retrospective cohort study was conducted from 2020 to 2023. Eligible patients who had undergone RYGB were divided into subgroups based on BP limb lengths: short (50–75 cm), intermediate (80–125 cm), and long (150–175 cm). Primary outcomes were total weight loss (TWL) and % TWL at 1 and 2 years. Secondary outcomes were post-operative BMI and % BMI change at 1 and 2 years, micronutrient deficiencies, hypothyroidism, acute kidney injury (AKI) requiring treatment, and remission in associated medical problems. Subgroups were compared using multivariate analysis.

Results

Two hundred twenty-eight patients received a long BP limb, 194 patients received an intermediate BP limb, while 152 patients received a short BP limb. Primary outcomes TWL and % TWL were significantly different between the groups at 1 year: TWL and % TWL were greater in patients with long BP limbs. The difference between the long and short BP limb groups increased at the 2-year mark. Patients who had long BP limbs had higher rates of DM remission (12.3% vs 11.9% 6.6%), HTN (8.8% vs 5.7% vs 7.9%), GERD symptoms (14.5% vs 9.8% vs 5.3%), and OSA (8.8% vs 7.7% vs 5.3%). Vitamin A deficiency rates were higher in the long BP limb group.

Conclusions

The results suggest that longer BP limb lengths are conducive to TWL and overall treatment of obesity-related problems without severe rates of complications. Additional longer longitudinal studies are needed to assess the impact of long BP limbs on nutrition and weight loss in the long term.