Which is a common sign that a containment breach has occurred?

Which is a common sign that a containment breach has occurred?

• A. Loss of negative pressure
• B. Routine hallway cleanliness
• C. No alarms
• D. Doors remain closed

Answer: (A)

Maintaining negative pressure is essential to keep airborne contaminants contained. The clearest sign of a containment breach is the loss of negative pressure—the room no longer has a lower pressure than adjacent spaces. When this happens, air can flow from surrounding areas into or out of the containment area in an uncontrolled way, allowing contaminants to escape. This change is usually detected by differential pressure monitors or alarms that indicate neutral or positive pressure in the room. Routine hallway cleanliness doesn’t reflect pressure changes, and alarms or doors don’t alone confirm a breach since these systems can be present or fail independently of the actual pressure differential. Doors remaining closed also doesn’t guarantee that containment is maintained if the pressure balance has shifted.

Maintaining negative pressure is essential to keep airborne contaminants contained. The clearest sign of a containment breach is the loss of negative pressure—the room no longer has a lower pressure than adjacent spaces. When this happens, air can flow from surrounding areas into or out of the containment area in an uncontrolled way, allowing contaminants to escape. This change is usually detected by differential pressure monitors or alarms that indicate neutral or positive pressure in the room.

Routine hallway cleanliness doesn’t reflect pressure changes, and alarms or doors don’t alone confirm a breach since these systems can be present or fail independently of the actual pressure differential. Doors remaining closed also doesn’t guarantee that containment is maintained if the pressure balance has shifted.