"Green" methodology: An overview and basic principles

Area of Science:

• Environmental Science
• Nephrology
• Sustainability Studies

Background:

• Dialysis treatments contribute significantly to global carbon emissions.
• Existing data on the environmental impact of dialysis is fragmented.
• Standardized terminology for environmental impact in nephrology is lacking.

Purpose of the Study:

• To quantify the annual carbon emissions associated with hemodialysis (HD) treatments across different regions.
• To contextualize the carbon footprint of HD by comparing it to other environmental metrics.
• To highlight the need for a unified environmental assessment framework for blood purification technologies.

Main Methods:

• Analysis of existing data on carbon emissions for hemodialysis.
• Calculation of carbon footprint in kilograms and CO2 equivalent per patient per year.
• Comparison of dialysis carbon footprint with vehicle emissions and production footprints.

Main Results:

• Annual carbon emissions for HD range from 3818-10,200 kgrs per region.
• CO2 emissions range from 1450-4503 CO2 eq/pt/year.
• The carbon footprint is equivalent to producing 2727-7285 liters of a product or driving 27,291-72,909 km.

Conclusions:

• Hemodialysis presents a significant environmental challenge due to its carbon emissions.
• There is a clear need for standardized environmental assessment of all blood purification technologies.
• Adopting consistent terminology is essential for scientific collaboration on this issue.