Liberation of Drugs from Impregnated Wound Covers

Overview

The present paper investigates drugs and polymers intended for the impregnation of textile carriersintended for use as wound covers. Their suitability was evaluated on the basis of the evaluation ofthe antimicrobial efficacy of a combination of trimetoprim and sulfadimidine with the local anaes-thetics carbizocaine and lidocaine, and the immunomodulating substance fungal glucan. A greaterinhibitory effect on the growth of microorganisms was shown by a combination of antimicrobialsubstances with carbizocaine. In the study of liberation of chlorohexidine from hydrophilic macro-molecular dispersions its bond to glucan was confirmed. Dispersions of Natrosol proved to be moreadvantageous; chlorohexidine as well as local anaesthetics were released from them more rapidlythan from methylcellulose gels. The dispersions under study are of a non-Newton character withpseudoplastic flow, glucan-containing gels are thixotropic.

Key words:
textile wound covers – antimicrobial substances – local anaesthetics – glucan –liberation of drugs