Anesthesia Technologist Practice Exam

What are the NIOSH recommendations for high airflow exchange rates in the operating room?

1. 15 air changes with a minimum of 5 fresh air exchanges per hour

2. 10 air changes with a minimum of 7 fresh air exchanges per hour

3. 20 air changes with a minimum of 4 fresh air exchanges per hour

4. 25 air changes with a minimum of 5 fresh air exchanges per hour

The correct answer is: 25 air changes with a minimum of 5 fresh air exchanges per hour

The NIOSH recommendations for high airflow exchange rates in the operating room emphasize the importance of maintaining a safe and sterile environment for surgical procedures. The correct answer reflects the guideline for a minimum of 25 air changes per hour, along with at least 5 fresh air exchanges. This high turnover rate of air is critical in reducing the concentration of airborne contaminants and minimizing the risk of surgical site infections, which can significantly improve patient outcomes. Having 25 air changes per hour ensures that the air within the operating room is frequently replaced, diluting any potential contaminants and maintaining a cleaner atmosphere. The requirement of at least 5 fresh air exchanges is essential to ensure that the air is not only recirculated but also refreshed with outdoor air, which helps in further dilution of contaminants and provides better ventilation. In contrast, options suggesting fewer air changes would not provide the same level of environmental control necessary in a surgical setting. Lower air change rates could result in inadequate filtration and ventilation, increasing risks associated with airborne pathogens and other surgical hazards.