. 2023 Jan 12;9:1068428. doi: 10.3389/fmed.2022.1068428

Table 2.

Inspired tidal volume and positive end-expiratory pressure across devices and cannulas at baseline and under high flow oxygen therapy.

Device	Baseline		HFOT
	Nasal cannula	Tracheal cannula	Nasal cannula	Tracheal cannula
	Inspired tidal volume (L) ^, ^*, ^†		Inspired tidal volume (L) ^, ^*, ^†
Optiflow	0.207 (0.207–0.207)	0.194 (0.194–0.194)	0.192 (0.192–0.192)	0.187 (0.187–0.187)
Airvo2	0.207 (0.206–0.207)^††	0.194 (0.194–0.194)^††	0.196 (0.196–0.196)^††	0.187 (0.187–0.188)^††
C5	0.207 (0.207–0.207)^††	0.195 (0.195–0.195)^††	0.197 (0.197–0.197)^††	0.187 (0.187–0.187)
HM80	0.207 (0.207–0.207)^††	0.195 (0.195–0.195)^††	0.194 (0.194–0.194)^††	0.189 (0.189–0.189)^††
T60	0.207 (0.207–0.207)^††	0.193 (0.193–0.193)^††	0.196 (0.196–0.196)^††	0.185 (0.185–0.185)^††
V500	0.207 (0.207–0.207)^††	0.195 (0.195–0.195)^††	0.196 (0.196–0.196)^††	0.187 (0.187–0.187)^††
V60	0.207 (0.207–0.207)^††	0.195 (0.195–0.195)^††	0.194 (0.194–0.194)^††	0.189 (0.188–0.189)^††
	PEEP (cmH₂O) ^, ^*, ^†		PEEP (cmH₂O) ^, ^*, ^†
Optiflow	0.0 (0.0–0.0)	0.0 (0.0–0.0)	0.9 (0.9–0.9)	0.9 (0.9–0.9)
Airvo2	0.0 (0.0–0.0)^††	0.0 (0.0–0.0)	0.6 (0.6–0.7)^††	0.6 (0.6–0.6)^††
C5	0.1 (0.0–0.1)	0.0 (0.0–0.1)^††	0.6 (0.6–0.6)^††	0.4 (0.4–0.4)^††
HM80	0.0 (0.0–0.0)	0.1 (0.1–0.1)^††	0.6 (0.6–0.6)^††	0.5 (0.5–0.5)^††
T60	0.1 (0.0–0.1)^††	0.0 (0.0–0.0)^††	0.6 (0.6–0.7)^††	0.5 (0.5–0.5)^††
V500	0.0 (0.0–0.0)^††	0.1 (0.0–0.1)^††	0.6 (0.6–0.6)^††	0.4 (0.4–0.4)^††
V60	0.1 (0.1–0.1)^††	0.1 (0.1–0.1)^††	0.8 (0.7–0.8)^††	0.5 (0.5–0.5)^††

Values are medians (1st−3rd quartiles).

HFOT, high flow oxygen therapy.

P < 0.05 for cannula,

^**

P < 0.05 for device,

^†

P < 0.05 for interaction between cannula and device,

^††

P < 0.05 vs. optiflow.