Why are isolation rooms designed with negative pressure relative to adjacent spaces?

Why are isolation rooms designed with negative pressure relative to adjacent spaces?

• A. To prevent contaminated air from flowing into other spaces and protect other occupants.
• B. To equalize air pressure with adjacent spaces.
• C. To reduce energy use.
• D. To enhance patient comfort.

Answer: (A)

Maintaining negative pressure in isolation rooms creates a directional airflow that pulls air from surrounding spaces into the room. This prevents contaminated air from escaping to hallways or adjacent rooms, protecting other occupants. The room’s air is then exhausted to the building’s dedicated exhaust system, typically with filtration, so pathogens aren’t released back into the facility. If the pressure were the same as surrounding spaces, air could flow in any direction, increasing the risk of spreading contaminants. The design isn’t about reducing energy use or comfort; its primary purpose is to contain airborne hazards and protect others.

Maintaining negative pressure in isolation rooms creates a directional airflow that pulls air from surrounding spaces into the room. This prevents contaminated air from escaping to hallways or adjacent rooms, protecting other occupants. The room’s air is then exhausted to the building’s dedicated exhaust system, typically with filtration, so pathogens aren’t released back into the facility. If the pressure were the same as surrounding spaces, air could flow in any direction, increasing the risk of spreading contaminants. The design isn’t about reducing energy use or comfort; its primary purpose is to contain airborne hazards and protect others.