Efficacy of Various Facial Protective Equipment for Infection Control in a Healthcare Setting

Area of Science:

• Infectious disease transmission
• Public health
• Protective equipment efficacy

Background:

• The COVID-19 pandemic underscored the need for effective facial protection against droplet-borne diseases.
• Healthcare workers rely on personal protection equipment (PPE), including masks and face shields.
• Limited evidence exists on the comparative efficacy of different face shield designs against droplet transmission.

Purpose of the Study:

• To evaluate the effectiveness of various face shield designs in preventing droplet transmission.
• To compare the protective capabilities of different PPE against simulated cough droplets.

Main Methods:

• Simulated droplet transmission using a fluorescein-laden spray on a mannequin head.
• Tested various face shields and masks at different angles (0°, 45°, 90°) and distances (30 cm, 60 cm, 90 cm).
• Quantified particle count, distribution area, average size, and percentage area covered; analyzed using regression models.

Main Results:

• All tested PPE significantly reduced particle contamination compared to the control (no PPE).
• The LCG shield exhibited the lowest particle contamination among all tested face shield designs.
• Statistical analysis confirmed the LCG shield's superior performance (P < 0.05).

Conclusions:

• Wearing protective coverings is crucial for mitigating droplet transmission.
• The LCG shield provided the most significant reduction in facial droplet contamination among the evaluated PPE.
• Findings emphasize the importance of selecting effective face shields for healthcare settings.