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Gentamicin penetration into diseased appendix tissue.

M A Gill, J L Cohen, F C Chenella

    Therapeutic Drug Monitoring
    |January 1, 1984
    PubMed
    Summary
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    This study found that even with varying gentamicin levels in appendix tissue, serum, and fluid, no infections occurred in appendicitis cases. Tissue gentamicin concentrations did not correlate with infection risk or sampling time.

    Area of Science:

    • Pharmacology
    • Surgical Infections
    • Clinical Microbiology

    Background:

    • Appendicitis, particularly gangrenous or perforated, poses a risk of infectious complications.
    • Gentamicin is an antibiotic commonly used in surgical prophylaxis and treatment.
    • Understanding antibiotic concentrations at infection sites is crucial for optimizing therapy.

    Purpose of the Study:

    • To determine gentamicin concentrations in appendix tissue, serum, and peritoneal fluid in patients with appendicitis.
    • To investigate the relationship between tissue gentamicin levels and the pathological state of the appendix.
    • To assess correlations between gentamicin concentrations and the timing of sample collection relative to antibiotic administration.

    Main Methods:

    • Prospective collection of appendix tissue, serum, and peritoneal fluid samples.

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  • Measurement of gentamicin concentrations using appropriate analytical techniques.
  • Correlation analysis between drug levels, tissue pathology, and time post-dose.

    • Main Results:

    • Gentamicin concentrations varied widely across tissue, serum, and peritoneal fluid.
    • No infectious complications were observed in the study cohort, irrespective of gentamicin levels.
    • No significant correlation was found between appendix tissue gentamicin concentrations and the severity of appendicitis.
    • No correlation was identified between tissue gentamicin concentrations and the time elapsed since the last antibiotic dose.

    Conclusions:

    • Achieving therapeutic gentamicin concentrations in appendix tissue may not be essential for preventing infectious complications in appendicitis.
    • Current dosing strategies may be adequate, or other factors may contribute to infection prevention.
    • Further research is needed to fully elucidate the role of antibiotic tissue penetration in appendicitis outcomes.