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Nitrogen absorption following small-intestinal resection

E Hylander, K Ladefoged, S Jarnum

    Scandinavian Journal of Gastroenterology
    |January 1, 1980
    PubMed
    Summary
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    Patients with extensive small-bowel resection absorb significant nitrogen, even with an ileostomy. This nitrogen absorption is lower with larger resections but does not affect overall nitrogen balance.

    Area of Science:

    • Gastroenterology
    • Nutritional Science
    • Surgical Research

    Background:

    • Small-bowel resections can impair nutrient absorption.
    • Understanding nitrogen absorption is crucial for managing patients post-surgery.
    • The role of the colon in nitrogen balance after resection is not fully understood.

    Purpose of the Study:

    • To assess nitrogen absorption and balance in patients with varying degrees of small-bowel resection.
    • To compare nitrogen metabolism between patients with and without a functioning colon.
    • To evaluate the impact of ileostomy on nitrogen absorption and balance.

    Main Methods:

    • Nitrogen balance study conducted in 40 patients with diverse small-bowel resections.
    • Patients categorized based on resection length (≥150 cm vs. <150 cm) and colon function (present vs. ileostomy).

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  • Body weight and nitrogen intake/absorption/balance were measured.

    • Main Results:

    • Net nitrogen absorption was significantly lower in patients with extensive small-bowel resection (≥150 cm) compared to those with less resection.
    • No significant difference in nitrogen balance was found between groups with extensive vs. less resection.
    • No differences in nitrogen absorption, balance, or body weight were observed between patients with a functioning colon and those with an ileostomy.

    Conclusions:

    • Patients with extensive small-bowel resection demonstrate notable nitrogen absorption, even with an ileostomy.
    • The presence or absence of the colon did not significantly impact nitrogen absorption or balance in this cohort.
    • These findings highlight the adaptive capacity for nitrogen absorption in the remaining small bowel.