Neurally adjusted ventilatory assist (NAVA) allows patient-ventilator synchrony during pediatric noninvasive ventilation: a crossover physiological study

Table 3 Patient–Ventilator asynchrony parameters in the three NIV conditions

	Initial conventional NIV period	NIV-NAVA period	Final conventional NIV period	Pvalue^a
Inspiratory trigger synchrony (ms)	164 (137-217)	71 (60-106)	190 (168-222)	0.02^b
Absolute cycling-off asynchrony (ms)	104 (51-257)	24 (14-38)	86 (33-156)	0.02^b
Wasted efforts (% neural breath)	12 (4-20)	0 (0-0)	6 (2-22)	<0.01^b
Autotriggering (% ventilator breath)	2 (0-22)	0 (0-1)	4 (0-26)	0.34
Asynchrony time (% total time)	27 (19-56)	8 (6-10)	32 (21-38)	0.05

All values expressed as median and interquartile values.
^aFriedman test. The statistical analyses were restricted to the 10 patients in whom conventional NIV was not CPAP.
^bSignificant difference between Initial conventional and NIV-NAVA and between NIV-NAVA and Final Conventional.

ISSN: 1364-8535