Spaulding Inanimate Objects Classification Critical: Level: Heat Sterilization; Risk: Very High; Objects: touch bone or penetrate tissue; blood present (scalpels, forceps, scalers, probes, implants) Semi-Critical: Level: Sterilization, High-Level Disinfection Risk: Moderate, Objects: Touch mucous membrane but not penetrate; no blood, (mirrors, burnishers, amalgam carriers, etc.) Non-Critical: Level: Intermediate; Risk: Low; Objects: Unbroken skin contact; no blood; (masks, clothing, b.p. cuffs) Environmental Surfaces: Equipment Housekeeping: Level: Low level disinfection; sanitation; Risk: Minimal; Objects: No direct patient contact; no blood units, knobs, light floors, walls, counters