Difficulty: Hard

Average Score: 38%

When cleaning a horizontal laminar flow hood, which of the following is the best practice?

Rationale

Avoid direct contact with the HEPA filter.

Maintaining the integrity of the HEPA filter is crucial for the effectiveness of a laminar flow hood. Direct contact can compromise the filter's structure and functionality, potentially leading to contamination and reduced airflow efficiency.

A (Spray the cleaner directly into the hood.) YOUR ANSWER

Spraying cleaner directly into the hood can create aerosols that may disturb the airflow pattern and introduce contaminants into the work area. Instead, cleaners should be applied to cloths or surfaces to minimize disruption and maintain a sterile environment.

B (Clean the hood sides from bottom to top.) YOUR ANSWER

Cleaning from bottom to top is counterproductive, as it can allow contaminants to drip down onto already cleaned surfaces. The best practice is to clean from top to bottom to ensure that debris and contaminants fall away from cleaned areas, maintaining a sterile environment throughout the process.

C (Use a clean fabric cloth.) YOUR ANSWER

While using a clean cloth is important, the choice of material is also critical. Not all fabric types are suitable for cleaning in sterile environments, as some may shed fibers or introduce contaminants. It is essential to use lint-free wipes or materials specifically designed for cleanroom environments to avoid any potential contamination.

Conclusion

When cleaning a horizontal laminar flow hood, the primary consideration should be to avoid direct contact with the HEPA filter, as this can compromise its effectiveness. Proper cleaning techniques include avoiding disruptive spraying, cleaning from top to bottom, and selecting appropriate cleaning materials. Following these practices ensures that the laminar flow hood remains a reliable source of sterile airflow, vital for contamination-sensitive procedures.

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