Transmission-based Precautions II: Airborne and Protective Environment

Airborne precautions prevent transmission of infectious agents that spread through small droplets suspended in the air, such as tuberculosis or measles. These pathogens remain airborne and can infect others at a distance. Healthcare facilities implement airborne precautions to protect staff, visitors, and other patients from exposure to these dangerous microorganisms.

Patients with airborne infections must be isolated in a single room with negative-pressure ventilation, where air flows into the room but is exhausted outside. Doors must remain closed to maintain negative pressure and prevent contaminated air from escaping. This controlled environment is essential for containing airborne pathogens and protecting others in the healthcare facility.

Healthcare professionals must wear a properly fitting N95 respirator when entering an airborne isolation room. The N95 respirator filters incoming air and protects the wearer from inhaling airborne pathogens. Proper fit is critical to ensure the respirator functions effectively and provides adequate protection against airborne transmission.

Protective environment precautions protect immunocompromised patients, such as transplant or chemotherapy recipients, from acquiring infections. Unlike airborne precautions that use negative pressure, protective environments use positive airflow ventilation with HEPA filtration at greater than twelve air exchanges per hour. These specialized rooms prevent contaminated air from entering and protect vulnerable patients from environmental pathogens.

Equipment should be designated exclusively for patients under protective environment precautions when possible. Before use, all equipment must be cleaned with facility-recommended disinfectants. Disposable items are preferred to minimize contamination risk. Non-dedicated equipment requires thorough cleaning and disinfection before use with protected patients to prevent introducing pathogens into the specialized environment.

Patients on airborne precautions should limit movement outside their rooms and wear a mask when leaving. Patients in protective environments must also wear a mask when outside their room to prevent exposure to environmental pathogens. These measures reduce transmission risk and protect both the patient and others in the healthcare facility during necessary movement.

Individuals who have unprotected contact with patients infected with airborne pathogens may receive immediate immunization as a precautionary measure. This early intervention helps prevent disease development in exposed healthcare workers or visitors. The specific immunization depends on the pathogen involved and institutional protocols for managing occupational exposures.