Related Experiment Video
Updated: Jul 9, 2025

Effects of Surgical Masks on Cardiopulmonary Function in Healthy Subjects
Published on: February 12, 2021
The effect of clinical face shields on aerosolized particle exposure
Ian Chao1, Sarah Lee2, Jason Brenker3
1Department of Anaesthesia, Box Hill Hospital, Eastern Health, Melbourne, Australia.
Background:
Face shields protect healthcare workers (HCWs) from fluid and large droplet contamination. Their effect on smaller aerosolized particles is unknown.
Materials & Methods:
An ultrasonic atomizer was used to simulate particle sizes equivalent to human breathing and forceful cough. Particles were measured at positions correlating to anesthetic personnel in relation to a patient inside an operating theatre environment. The effect of the application of face shields on HCW exposure was measured.
Results & Conclusion:
Significant reductions in particle concentrations were measured after the application of vented and enclosed face shields. Face shields appear to reduce the concentration of aerosolized particles that HCWs are exposed to, thereby potentially conferring further protection against exposure to aerosolized particles in an operating theatre environment.
Related Concept Videos
Transmission-based Precautions II: Airborne and Protective Environment
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
PPE Use in Healthcare Settings II: Doffing
Personal Protective Equipment
Tracheostomy Care II: Procedure
Step 1: Perform hand hygiene, and put on personal protective equipment: gown, gloves, mask...
PPE Use in Healthcare Settings I: Donning

