N2O commonly called as laughing gas, is an anesthetic
agent used in operating rooms. Workers are exposed to N2O
while administering the anesthetic gas to patients. To protect
workers from the health risks associated with N2O, operating
rooms are often equipped with scavenging systems that vent
unused and exhaled gas away from the work area. Recent
research shows that these systems can significantly reduce
the risk of impaired fertility among female dental assistants
exposed to N2O [85]. Several human studies have shown that
occupational exposure to N2O, may cause reduced fertility,
spontaneous abortions, and neurologic, renal, and liver disease
as well as documented decreases in mental performance,
audiovisual ability, and mental dexterity in susceptible
individuals [84,85].