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. 2020 Jun 22;95(9):S11–S13. doi: 10.1016/j.mayocp.2020.05.038

Table.

Three-Tiered System for Determining Requirements for PPEa

Risk level Definition PPE requirement Procedures
High Clear risk of aerosol generation Respirator, eye protection, gown, gloves Intubation
Bronchoscopy
Medium Possible, but not substantial, risk of aerosol generation For suspected COVID-19: respirator, eye protection, gown, gloves
For other procedures: standard precautions for the procedureb
BiPAP/CPAP with a viral filter in place
Nasogastric tube placement
Low Little risk of aerosol generation For suspected COVID-19: mask, eye protection, gown, gloves
For other procedures: standard precautions for the procedureb
Nasopharyngeal swab collection
Physiological coughing
a

BiPAP = bilevel positive airway pressure; COVID-19 = coronavirus disease 2019; CPAP = continuous positive airway pressure; PPE = personal protective equipment.

b

Standard precautions for procedures and patient care in which COVID-19 is not suspected and the risk of aerosol generation is not high are masks for the patient and health care worker or mask plus eye protection for the health care worker in any situation in which the patient cannot reliably be masked.