Table 3.

Comparison of tidal variation of NC versus HFNC in dorsal, ventral, left, and right regions of interest

Variable	NC (AU)	HFNC (AU)	Percent change (%)	P-value
Overall	2,241 ± 1,381	2,543 ± 1,534	15.6 ± 16.9	<0.001
Dorsal	1,366 ± 1,084	1,511 ± 1,198	12.0 ± 16.4	0.009
Ventral	875 ± 645	1,032 ± 727	52.2 ± 121.2	0.007
Left	941 ± 693	1,065 ± 730	28.7 ± 58.1	0.011
Right	1,232 ± 1,124	1,399 ± 1,265	26.7 ± 63.6	0.003

Values are presented as mean ± standard deviation.

NC: nasal cannula; HFNC: high flow nasal cannula; AU: arbitrary units.