What AAMI defines as critical zones
AAMI PB70 defines critical zones as the front, the sleeves and the seams of the gown — the areas most exposed to fluid during a procedure. The gown must provide its rated barrier level in these zones, while the back and other non-critical areas may carry a lower barrier. This is why two gowns with the same AAMI level can protect differently: the level number alone does not tell you how much of the torso is covered by the rated barrier.
- Critical zones are the front, sleeves and seams
- The rated barrier must hold in these zones
- The back and non-critical areas may be lower barrier



