How continuous analytics and End-tidal Control cut emissions and costs at Christchurch Hospital
Christchurch Hospital is the major regional hospital in the upper South Island of Aotearoa, New Zealand, serving a primary population of 600,000, along with a range of supra-regional services. For 22 years, the Christchurch team tracked fresh gas flow (FGF) during sevoflurane anaesthesia. This tracking included data from the entire case, not just the maintenance phase, because high FGF in the early phase of anaesthesia has a significant effect on overall consumption1.
Over time, since 2020, Christchurch hospital experienced a 19 percent decrease in mean FGF (970 to 780 ml/min) despite the increasing use of TIVA, and the hospital's trainees concern about losing skills associated with volatile anaesthetic agent use. Comparing 2018 and 2025, inhaled anaesthesia emissions per minute have reduced by 58%. Maintaining the hospital's leading standards in low-flow practices requires continuous monitoring, feedback and education.