Medifil II Collagen Particles Wound Dressings stop bleeding as they bind to specific recepter sites, aid in wound cleansings and the establishment of new tissue and blood vessels, and create a structural matrix for healing. Medifil II Particles help to create a biological response; attracting the cellular components necessary to stimulate the healing process. Medifil II dressing is indicated for undermined/tunneled, infected/contaminated, deep cavity, surgical and traumatic wounds that are draining. 1 g (10mL) vials.