The ANSI/AAMI PB 70: 2012 report from the Association for the Advancement of Medical Instruments (AAMI) classifies the liquid barrier performance of protective apparel and drapes intended for use in health facilities. The classification outlines four levels of protection and their use:
Basic care, standard hospital medical unit.
Blood draw from a vein, suturing, intensive care unit, pathology lab.
Arterial blood draw, inserting IV, emergency room, trauma.
Pathogen resistance, infectious diseases (non-airborne), large amounts of fluid exposure over long periods.