Value Proposition
· Reduces contamination risk in doffing procedures: The integrated design of the disclosed technology simplifies the removal of PPE components, reducing doffing errors (self-contamination from mistakes when removing PPE).
· Dual-pathway ventilation design: Bilayer check valves direct filtered air across the face shield (preventing fogging) while exhausting breath outside the hood through integrated values, mitigating issues associated with exhaling within the hood/full suit. This design reduces fogging, heat accumulation, and buildup of CO2 levels within the hood/full suit.
· Cost-effective and unpowered: The disclosed technology requires no batteries or maintenance, significantly reducing cost, weight, and complexity compared to battery operated competitors while delivering protection without needing a PAPR system.
Unmet Need
· Healthcare and industrial workers require respiratory protection in environments ranging from routine operating room procedures to infectious disease treatment. Current solutions present significant trade-offs:
o Powered Air Purifying Respirator (PAPR) systems: While safe and effective, these battery-powered systems are expensive and too bulky for widespread use.
o Multicomponent PPE Ensemble Methods: Combining separate PPE components are prone to doffing errors (self-contamination when removing PPE), shield fogging, heat accumulation, and CO2 buildup.
· Therefore, there is a critical need for affordable, comfortable, and integrated and reliable protection suitable for extended wear in both high-risk (Ebola, SARS) and routine healthcare environments.
Technology Description
· Researchers at Johns Hopkins University developed an unpowered respiratory protective system that integrates a respiratory mask directly within a protective hood or full-body suit. The core innovation is a dual-pathway ventilation design: during inhalation, air enters through the hood vents and flows across the face shield to prevent fogging; during exhalation, breath exits through the separate valves, eliminating CO2 and heat buildup outside the hood environment.
· This integrated single-unit design simplifies donning/doffing compared to multi-component PPE ensembles, reducing self-contamination risks while eliminating the battery dependence, weight, and cost of powered air-purifying respirator systems.
Stage of Development
· As of 11/14/2025, the technology has been validated through prototype testing and is protected by the active patent: US11697036B2.
Data Availability
· Data available upon request.
Publication
· N/A
