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The Role of Low Fresh Gas Flow in Reducing Anesthetic Gas Waste

Authors
Kulina, Julia
Date
2025-05
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Peer Reviewed
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DNP Project
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ANESTHETIC GAS WASTE
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Abstract

Problem: At a midsized community hospital in Baltimore, Maryland, an internal audit found that the anesthesia providers predominately set excessive fresh gas flow (FGF) rates when administering a general anesthetic via a closed-circuit system. Anesthetic gas waste leads to heightened pharmaceutical costs, decreased anesthetic efficiency, and harmful environmental emissions. In selecting the FGF rate, the gap between the current and best practice at this community hospital warranted a quality improvement (QI) project. Purpose: The purpose of this QI project is to reduce anesthetic gas waste among adult patients undergoing general anesthesia in the operating room by implementing low FGF rates. Methods: Over a 15-week period, the project lead (PL) has implemented and measured the adaptation of low FGFs at a midsized community hospital. Strategies to integrate the practice change included an educational in- service on low FGF to the anesthesia staff and an automated low flow reminder integrated into the electronic charting system. The PL performed weekly chart audits to quantify provider adherence to low flow and maintained a record of sevoflurane purchase orders to approximate sevoflurane consumption. Results: This QI project increased the average use of low flow from 38.1% to 44.1%. The 6.4% increase in low flow adherence resulted in a substantial decrease in sevoflurane consumption. By the end of the implementation process, the average purchase order for sevoflurane bottles decreased from 14.2 to 5.1 bottles per week. Conclusions: In this QI project, the reduction in sevoflurane consumption corresponded with an average cost reduction of over $550 per week. Following the implementation period, the anesthesia staff at this facility have greatly increased low flow adherence, suggesting a practice change may require longer than 15 weeks to successfully integrate into the culture

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