Certification of Pharmacy Technicians (ExCPT) Practice Exam

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How long should a laminar airflow workstation run after being turned off between aseptic processing sessions before next use?

Does not matter
At least 15 minutes
At least 30 minutes
It should never be turned off

The correct answer is: At least 30 minutes

A laminar airflow workstation is essential for maintaining a sterile environment during aseptic processing. When the workstation is turned off, it ceases to provide the necessary air filtration and sterile airflow. To ensure that the workspace is adequately cleared of any potential contaminants and that the air within the workstation has been fully refreshed, it is recommended that the workstation must run for at least 30 minutes after being turned off before the next use. This 30-minute period allows the system to stabilize, ensuring that the airflow reaches optimal levels and that any residual airborne contaminants are effectively filtered out. This practice is crucial for maintaining the integrity of the sterile environment necessary for preparing medications and working with sterile products. The other options are not safe practices for aseptic processing; turning the workstation off indefinitely would leave the area unsterile and potentially expose it to contamination, while shorter run times would not provide adequate time for the workstation to effectively filter the air.