- Bacterial biofilm is present in approximately 60 percent of chronic wounds.
- Biofilm causes chronic inflammation and can prevent pressure injuries from healing.
- Biofilm is microscopic and cannot be seen by the naked eye.
- A wound swab is also unable to determine its presence.
- Suspect bacterial biofilm in a pressure injury that:
- has been present for more than four weeks,
- has not shown any signs of healing in the previous two weeks,
- displays clinical signs and symptoms of inflammation, and/or
- does not respond to antimicrobial therapy.
Assessment and Management of Pressure Injuries for the Interprofessional Team, Third Edition
Point of Care Resources