Cavity Ring-Down Spectroscopy
303
Fig. 13 Excretion kinetics of exhaled water isotopes for H. pylori positive and negative patients.
Adapted with permission from [55]. Copyright, 2020, American Chemical Society
Fig. 14 Excretion kinetics
of exhaled 18 O of CO 2 for
normal, pre-diabetes and
type 2 diabetes patients.
Adapted with permission
from [56]. Copyright, 2015,
Nature Research
shown that
18 O-isotope of CO 2 is a potential marker for diagnosis of diabetes through
breath test.