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Related Experiment Videos

Permeability of the round window membrane.

T Okuno, Y Nomura

    Archives of Oto-Rhino-Laryngology
    |January 1, 1984
    PubMed
    Summary

    Cefmetazole sodium effectively penetrates the inner ear via the round window membrane in guinea pigs. This route delivers higher drug concentrations compared to intraperitoneal administration, suggesting a potential therapeutic advantage.

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    Area of Science:

    • Ototopical drug delivery
    • Pharmacokinetics
    • Antibiotic research

    Background:

    • Cefmetazole sodium is a cephamycin antibiotic.
    • Understanding drug penetration into the inner ear is crucial for treating inner ear infections and hearing disorders.
    • The round window membrane is a key barrier for drug entry into the inner ear.

    Purpose of the Study:

    • To investigate the passage of cefmetazole sodium into the inner ear of guinea pigs.
    • To compare the inner ear drug concentrations achieved via the round window membrane versus intraperitoneal administration.

    Main Methods:

    • Cefmetazole sodium was administered to guinea pigs.
    • Drug concentrations in the inner ear fluid were measured after administration via the round window membrane and intraperitoneally.

    Main Results:

    • Cefmetazole sodium was detected in the inner ear fluid after round window membrane administration.
    • Higher concentrations of cefmetazole sodium were found in the inner ear fluid when delivered through the round window membrane compared to intraperitoneal injection.

    Conclusions:

    • The round window membrane serves as a viable pathway for cefmetazole sodium to reach the inner ear.
    • Round window administration of cefmetazole sodium results in greater inner ear exposure than systemic administration.

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