Body Substance Isolation (BSI) is defined as which of the following?

• A. The practice of isolating bodily fluids and substances from contact with first responders
• B. The practice of avoiding contact with bodily fluids by PPE
• C. The practice of sterilizing all equipment
• D. The practice of immunizing responders

Answer: (A)

Body Substance Isolation focuses on preventing exposure by treating all body fluids and substances as potentially infectious and using barriers to keep them away from responders. The defining idea is to isolate contact with those substances, not just rely on PPE alone, and not to sterilize every part of equipment or rely on vaccination. PPE is a tool to implement the barrier, but the concept centers on preventing direct contact with bodily substances. The other options describe procedures or goals that aren’t about isolating contact with body substances.