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2.6 Procedures

Procedures calculations​

The total impact of procedures is the sum of the impact of all imaging and surgical procedures entered. The individual calculations for imaging and surgical procedures are as follows:

For imaging (MRI scans, CT scans, X-Rays, Ultrasounds):​

Total number of [procedure] x total number of participants x [procedure] EF

For surgical procedures under general anaesthetic:​

Total number of surgical procedures x total number of participants 
x duration of procedure (hours) x procedure EF per hour

Example in which there are 50 participants, and each has 2 MRI scans and 1 surgical procedure under general anaesthetic for a duration of 2 hours.

(2 x 50 x 17.5 kg CO2 eq) 
+ (1 x 50 x 2 x 54.4 kg CO2 eq per hour) 
= 7,190 kg CO2 eq

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