[Experimental study of a gentamicin aerosol]. / Eksperimental'noe izuchenie aérozolia gentamitsina

The study of gentamicin aerosol showed its relative innocuousness: it did not inhibit the growth and development of young animals, did not induce pathological changes in the upper respiratory tract, kidneys, liver, heart and spleen on its prolonged use. Pathohistological examination revealed slight irritating effect of the gentamicin aerosol in the lungs after its use in a dose of 8 or 25 mg/kg for 6 weeks. A procedure for investigating the effect of the aerosol on the activity of the trachea ciliated epithelium of warm blooded animals was developed. The gentamicin aerosols prepared from solutions of different concentrations (1 to 50 mg/ml) induced ingibition of the ciliated epithelium function at average from 15 to 35 per cent which was associated with the solution acidity (pH 4.54 to 4.82). Such a decrease in the function of the ciliated epithelium due to the antibiotic aerosol use was a factor prolonging the antibiotic retention time in the respiratory organs. It was found that aqueous solutions of drugs used for inhalation, such as ephedrin, euphelin, dimedrol, N-acetyl-L-cystein and others had no effect on the activity of gentamicin and may be used with it in a form of aerosols.

[Experimental study of an aerosol preparation containing gentamicin (gentasol)]. / Eksperimental'noe izuchenie aérozol'nogo preparata, soderzhashchego gentamitsin (gentazol')

Composition of a suspension aerosol drug, gentasol for local application was developed. It contained gentamycin and prednisolon. The antimicrobial properties of the drug were studied in vitro. It was found that gentasol had a pronounced antimicrobiol effect and inhibited the growth of many microorganisms including cultures resistant to other antibiotics. The drug was active against Ps. aeruginosa and Proteus, which is an advantage of it as compared to other antibiotic aerosol drugs. The study showed that gentasol had self-sterilizing properties.