Table 1.

NAVA level and respiratory variables during tNAVA and cNAVA for each condition (n = 9)

		Invasive			Non-invasive
		RES1	CO2	ALI	RES2	CO2	ALI
NAVA level (cm H2O/μV)		5.5 ± 0.4	2.1 ± 0.2	2.2 ± 0.6	4.1 ± 0.8	2.6 ± 0.4	2.6 ± 0.5
Nti (sec)	tNAVA	0.67 ± 0.06	0.50 ± 0.06	0.47 ± 0.09	0.71 ± 0.11	0.63 ± 0.10	0.56 ± 0.11
	cNAVA	0.62 ± 0.04*	0.47 ± 0.06*	0.45 ± 0.07*	0.71 ± 0.15	0.60 ± 0.08*	0.54 ± 0.10
Nte (sec)	tNAVA	1.41 ± 0.24	0.93 ± 0.21	1.11 ± 0.54	1.67 ± 0.52	1.16 ± 0.34	0.95 ± 0.48
	cNAVA	1.56 ± 0.30*	0.99 ± 0.24	1.10 ± 0.53	1.87 ± 0.54*	1.28 ± 0.37*	1.06 ± 0.49
Nti/Tot (%)	tNAVA	0.33 ± 0.03	0.36 ± 0.05	0.34 ± 0.11	0.32 ± 0.07	0.36 ± 0.07	0.41 ± 0.09
	cNAVA	0.29 ± 0.03*	0.33 ± 0.04*	0.32 ± 0.09	0.29 ± 0.05*	0.33 ± 0.07*	0.36 ± 0.07*
Nrr (per min)	tNAVA	30.2 ± 3.9	43.9 ± 7.5	46.9 ± 27.5	28.4 ± 10.1	35.8 ± 8.3	47.7 ± 21.9
	cNAVA	28.8 ± 4.4	42.9 ± 7.0	46.0 ± 21.5	26.1 ± 9.0	33.8 ± 7.2	42.8 ± 15.5

Data are presented as average value of the means and standard deviation all 3 round s in each condition. *p < 0.05 cNAVA compared to tNAVA in the same condition

INV-RES¹ Invasive ventilation with added resistive load, INV-CO₂ Invasive ventilation with CO₂ blended in to air supply/medical air, INV-ALI invasive ventilation with acute lung injury, NIV-RES² Non-invasive ventilation with added resistive load, NIV-CO₂ Non-invasive ventilation with CO₂ blended in to air supply/medical air, NIV-ALI Non-invasive ventilation after acute lung injury, Nti Neural inspiratory time, Nte Neural expiratory time, Nti/Tot Neural inspiratory duty cycle, Nrr Neural respiratory rate