Selecting Certified Protective Apparel in High-Fluid Procedures
In operating suites and intensive care units, surgical teams face exposure to bloodborne pathogens (HIV, Hepatitis B/C). ANSI/AAMI PB70 classifies medical protective gowns and drapes into four distinct performance tiers based on liquid barrier efficacy.
AAMI Level Breakdown and Testing Metrics
- Level 1 (Minimal Risk): Tested via AATCC 42 (Water Impact Penetration < 4.5g). Basic visitor and med-surg floor gowns.
- Level 2 (Low Risk): Tested via AATCC 42 (< 1.0g) and AATCC 127 (Hydrostatic Pressure > 20 cm H2O). Suturing, phlebotomy, and standard clinical wards.
- Level 3 (Moderate Risk): Tested via AATCC 42 (< 1.0g) and AATCC 127 (> 50 cm H2O). Laparoscopic surgery, ER trauma intake, and arterial line insertions.
- Level 4 (Highest Critical Risk): Must pass ASTM F1671 viral penetration testing using Phi-X174 bacteriophage under hydrostatic challenge. Mandatory for open orthopedic joint replacements, trauma surgery, and cesarean sections.
Multi-Layer SMS and Breathable PE Film Laminates
SterileValley manufactures Level 3 and Level 4 isolation and surgical gowns utilizing non-woven SMS (Spunbond-Meltblown-Spunbond) fabrics reinforced with monolithic breathable microporous film laminates, delivering complete viral impermeability while allowing body heat vapor to escape.
