Anterooms, or transitional spaces, play a vital role in protecting cleanrooms from contamination. However, human behavior is often the primary source of failure in these controlled environments.
Understanding Anterooms
An anteroom acts as a buffer zone between uncontrolled and controlled environments. It’s designed to prevent contaminants from entering the cleanroom. While many cleanroom staff understand their roles within the controlled area, their actions in the anteroom can significantly impact contamination levels.
Key Factors Contributing to Anteroom Contamination:
-
Airflow Disruption:
- Obstructed vents: Placing equipment or materials near exhaust vents can disrupt airflow and trap contaminants.
- Horizontal surfaces: Avoid placing items on surfaces in front of vents, as they can block airflow and create a breeding ground for contaminants.
-
Improper Gowning:
- Particle shedding: Incorrectly donning or doffing cleanroom apparel can release particles and microbes into the environment.
- Coverall handling: Ensure coveralls are handled carefully to prevent contamination from contact with floors or other surfaces.
-
Controlled Movements:
- Minimize particle release: Avoid sudden or excessive movements, as they can dislodge particles from clothing and equipment.
- Avoid floor contamination: Walk slowly and deliberately to prevent stirring up contaminants from the floor.
-
Hygiene Practices:
- Handwashing: Regularly wash hands with a disinfectant soap to remove contaminants.
- Avoid touching face: Refrain from touching your face, eyes, or nose while in the anteroom or cleanroom.
- Personal hygiene: Limit the use of cosmetics, perfumes, and other personal products that can introduce contaminants.
-
Coughing and Sneezing:
- Use tissues: Use cleanroom wipes to cover your mouth and nose when coughing or sneezing.
- Leave the area: If possible, exit the anteroom or cleanroom to cough or sneeze.
-
Limited Personnel:
- Reduce contamination risks: Restrict the number of personnel in the anteroom or cleanroom at any given time.
By addressing these common human behaviors, facilities can significantly improve anteroom effectiveness and reduce the risk of cleanroom contamination.