Algidex Ag I.V. PATCH Silver Alginate Catheter Dressing. Provides quick and sustained antimicrobial barrier against a broad spectrum of wound pathogens associated with catheter related infections. Absorbs moisture around the catheter insertion site. Sterile patch of polyurethane foam coated with an ionic silver alginate and maltodextrin matrix. Does NOT require activation. Up to five days wear time. Non-irritating. Non-staining.