Neurobehavioral functions in operating theatre personnel: a multicenter study

Area of Science:

• Occupational Health
• Neurotoxicology
• Anesthesiology

Background:

• Operating theatre personnel are occupationally exposed to anesthetic gases like nitrous oxide and isoflurane.
• Potential neurobehavioral effects of low-level chronic exposure to these agents require evaluation.
• Assessing cognitive functions and subjective symptoms is crucial for worker safety.

Purpose of the Study:

• To evaluate neuropsychological symptoms, subjective stress, and response speed in subjects occupationally exposed to low levels of anesthetic gases.
• To compare exposed operating theatre personnel with non-exposed hospital workers.
• To determine if current biological exposure limits are adequately protective.

Main Methods:

• A cohort of 112 exposed operating theatre personnel and 135 non-exposed controls were studied.
• Neuropsychological tests (Stroop Color Word, EURO-QUEST, WAIS block design) were administered before and after shifts.
• Biological (urinary nitrous oxide, isoflurane) and atmospheric exposure indicators were measured.

Main Results:

• No statistical differences in neuropsychological tests or symptoms were found between exposed and control groups.
• No dose-effect relationships were observed between exposure indicators and test results.
• Measured exposure levels were below established biological exposure limits.

Conclusions:

• No early behavioral effects on the central nervous system were detectable at the measured low-level anesthetic gas exposure.
• Current biological exposure limits for nitrous oxide and isoflurane appear adequately protective for workers' neurobehavioral functions.
• The study supports the integrity of workers' neurobehavioral functions under current occupational exposure guidelines.