Manual Version 19 / 01-2019 II Page 8 of 44
SF2 ECCR OPERATION MANUAL
Our body consumes (metabolizes) the oxygen we breathe. This creates carbon
dioxide - CO2. We normally release this gas back into the environment when we
breathe. But since our breathing circuit is closed, the CO2 also remains in the
system. Hypercapnia, i.e. an increase in the level of carbon dioxide in the blood
(approx. 45 mmHg) can quickly lead to life-threatening situations, especially under
water. To prevent this from happening, the resulting CO2 is bound in a canister with
soda lime, which we will also go into briefly later.
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