Background: Nitrous oxide (N2O) has seen a marked decline in its usage in recent years due to its adverse clinical effects. We audited the practice in our department to evaluate the N2O consumption and cost-effectiveness of its supply.
Methodology: Electronic anesthesia records of all patients anesthetized in our main operating rooms in a typical month were reviewed retrospectively, and utilization of N2O was noted in addition to the patient demographics, surgical procedure, and specialty.
Results: A total of 950 patients were anesthetized, and 3.1% received N2O. The annual usage was estimated to be 72,871 liters, with a leakage of 3,883,105 liters to the environment, posing a safety hazard and wasting 149,612.50 SAR.
Conclusion: Notable costs and environmental benefits may be achieved by substituting a piped supply of N2O with portable E-cylinders on demand in operating rooms for rational use.
Keywords: Greenhouse gases; hazardous waste; nitrous oxide.
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