Waste anesthetic gas control: From discovery to source control scavenging in the postanesthesia care unit

The National Institute for Occupational Safety and Health (NIOSH) recently highlighted the presence of waste anesthetic gases (WAGs) in Postanesthesia Care Units (PACUs), raising significant concerns about occupational exposures in these environments. Exposure to WAGs is associated with a range of adverse health effects, from symptoms such as headaches and0 fatigue to more severe outcomes, including cancer, genetic mutations, reduced fertility, miscarriages, and congenital anomalies. The primary source of WAGs in PACUs is patient exhalation, as individuals leave the operating rooms (ORs) with lungs containing approximately 95% unmetabolized anesthetic gases, which are subsequently released into the ambient air. While NIOSH has emphasized the need for exposure controls in ORs, and the Occupational Safety and Health Administration (OSHA) has issued general (5a1) duty citations regarding WAG exposure in ORs, the risks within PACUs remain poorly recognized. As a result, PACU workers, particularly nurses, are left vulnerable due to the lack of effective source control measures. Furthermore, many PACU nurses and healthcare leaders are unaware of the occupational hazards posed by WAG exposure. This paper provides a brief overview, from WAG discovery to source control in the PACU. This paper highlights health risks associated with exposure to waste anesthetic gases (WAGs), with a focus on contamination levels in PACUs as reported by NIOSH. Evidence indicates that general ventilation and standard air exchange rates are insufficient to mitigate exposure within the patient breathing zone in PACUs. Source control technologies offer a promising solution to this underrecognized hazard. The role of the industrial hygienist is emphasized as critical in implementing protective strategies and advancing occupational health and safety for PACU personnel.