Observational studyObesity surgery2025
Total Alimentary Limb Length Is Not Associated with Weight Loss Following Proximal Roux-en-Y Gastric Bypass.
Observational study in Obesity surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02872493 (Observational Study of the Effect of Small Intestine Length on Bariatric Surgical Patient Outcomes), which is not on this map. Cited by 1 paper, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Observational Study of the Effect of Small Intestine Length on Bariatric Surgical Patient Outcomes
Who cites it
1 citing paper in PubMed, 1 synthesis or guideline pooled it.
- The Role of Total Small Bowel Length and its Measurement in Metabolic Bariatric Surgery. A Systematic Review.Obesity surgery · 2026Pooled it
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors.
Funding
Abstract
backgroundStandard Roux-en-Y gastric bypass (RYGB) typically manipulates the proximal portion of the small intestine, leaving a variable and unknown common channel and total alimentary limb length (TALL). Despite high variability in postoperative weight loss, the factors contributing to this variability remain unknown. Given the known variability in small intestinal length, this unmeasured variability in TALL may be associated with weight loss responses.
objectiveTo test the hypothesis that TALL is associated with postoperative weight loss following primary laparoscopic Roux-en-Y gastric bypass (RYGB).
settingVanderbilt University Medical Center; Nashville, Tennessee, USA.
methodsA total of 329 patients were recruited for this observational study and consented to laparoscopic measurement of the entire small intestinal length at the time of primary RYGB. Of these patients, 208 had successful measurement of the small bowel length (SBL) and underwent RYGB with a fixed biliopancreatic limb length (BPL, 50 cm). Common channel length (CCL) was allowed to vary normally to test the association between TALL and postoperative weight loss.
resultsFollow-up rates were 77% at 6 months and 41% at 24 months. Average SBL was 592 cm (min = 390 cm, max = 910 cm), with a standard deviation of 107 cm that led to significant variation in CCL (shortest 190 cm, longest 730 cm). Regression was used to model weight loss and body mass index, as well as percent change from baseline, for each patient given the measured TALL and CCL. Despite significant variation in TALL, there were no clinically significant effects of TALL or CCL on weight loss up to 24 months.
conclusionsWith a fixed BPL, normal variation in TALL does not significantly contribute to weight loss variability following RYGB. Future studies are needed to better understand the importance of intestinal limb lengths in primary and revisional RYGB surgery.
Indexed as
Identifiers
40146457What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.