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Observational Study
. 2018 Dec;20(4):304-312.

The carbon footprint of treating patients with septic shock in the intensive care unit

Affiliations
Observational Study

The carbon footprint of treating patients with septic shock in the intensive care unit

Forbes McGain et al. Crit Care Resusc. 2018 Dec.

Abstract

Objective: To use life cycle assessment to determine the environmental footprint of the care of patients with septic shock in the intensive care unit (ICU).

Design, setting and participants: Prospective, observational life cycle assessment examining the use of energy for heating, ventilation and air conditioning; lighting; machines; and all consumables and waste associated with treating ten patients with septic shock in the ICU at BarnesJewish Hospital, St. Louis, MO, United States (US-ICU) and ten patients at Footscray Hospital, Melbourne, Vic, Australia (Aus-ICU).

Main outcome measures: Environmental footprint, particularly greenhouse gas emissions.

Results: Energy use per patient averaged 272 kWh/day for the US-ICU and 143 kWh/day for the Aus-ICU. The average daily amount of single-use materials per patient was 3.4 kg (range, 1.0-6.3 kg) for the US-ICU and 3.4 kg (range, 1.2-8.7 kg) for the Aus-ICU. The average daily particularly greenhouse gas emissions arising from treating patients in the US-ICU was 178 kg carbon dioxide equivalent (CO2-e) emissions (range, 165-228 kg CO2-e), while for the Aus-ICU the carbon footprint was 88 kg CO2-e (range, 77-107 kg CO2-e). Energy accounted for 155 kg CO2-e in the US-ICU (87%) and 67 kg CO2-e in the Aus-ICU (76%). The daily treatment of one patient with septic shock in the US-ICU was equivalent to the total daily carbon footprint of 3.5 Americans' CO2-e emissions, and for the Aus-ICU, it was equivalent to the emissions of 1.5 Australians.

Conclusion: The carbon footprints of the ICUs were dominated by the energy use for heating, ventilation and air conditioning; consumables were relatively less important, with limited effect of intensity of patient care. There is large opportunity for reducing the ICUs' carbon footprint by improving the energy efficiency of buildings and increasing the use of renewable energy sources.

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Conflict of interest statement

Competing interests

None declared.

Figures

Figure 1.
Figure 1.. System boundary of what was included (within the dotted boundary) and excluded in this life cycle assessment
HVAC = heating, ventilation and air conditioning.
Figure 2.
Figure 2.
Daily Australian intensive care unit (ICU) gas and electricity use (kWh)
Figure 3.
Figure 3.. Components of the intensive care unit (ICU) process-based* greenhouse gas emissions (%)
Aus = Australian. CO2 = carbon dioxide. CXRs = chest x-rays. US = United States. * Process-based data do not include pharmaceuticals, intravenous fluids and pathology.

References

    1. Whitmee S, Haines A, Beyrer C, et al. Safeguarding human health in the Anthropocene epoch: report of the Rockefeller Foundation–Lancet Commission on planetary health. Lancet 2015; 386: 1973–2028. - PubMed
    1. Costello A, Abbas M, Allen A, et al. Managing the health effects of climate change. Lancet 2009; 373: 1693–733. - PubMed
    1. Eckelman MJ, Sherman J. Environmental impacts of the US health care system and effects on public health. PLoS One 2016; 11: e0157014. - PMC - PubMed
    1. Malik A, Lenzen M, McAlister S, McGain F. The carbon footprint of Australian health care. Lancet Planet Health 2018; 2: e27–e35. - PubMed
    1. Sustainable Development Unit. Carbon footprint update for the NHS in England 2015. Cambridge: National Health Service; 2016. http://www.sduhealth.org.uk/documents/publications/2016/Carbon_Footprint... (viewed Apr 2017).

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