Skip to main content

Table 2 Respiratory parameters during the Spontaneous breathing trials

From: Neurally Adjusted Ventilatory Assist (NAVA) or Pressure Support Ventilation (PSV) during spontaneous breathing trials in critically ill patients: a crossover trial

Variable

NAVA (n = 20)

PSV (n = 20)

p value

RR (rpm)

27 (17–30)

26 (20–30)

0.560

Vt/Kg (mL/Kg)

6.1 (5.5–6.5)

5.5 (4.8–6.1)

0.076

ΔEAdi (μV)

10.3 (5.2–22.9)

10.2 (6.4–20.6)

0.376

TIvent (s)

0.81 (0.66–1.11)

0.76 (0.68–0.91)

0.007

NVE (mL/μV)

34.5 (23.3–66.8)

35.4 (19.9–46.8)

0.920

Paw (cmH2O)

14.0 (12.9–15.2)

11.2 (11–11.7)

<0.001

pH

7.46(7.42–7.49)

7.46 (7.40–7.49)

0.947

pCO2 (mmHg)

40 (35–43)

40 (36–45)

0.188

  1. Values are medians (25%–75% interquartile range). RR respiratory rate, V T /kg tidal volume per kilogram of predicted body weight, ΔEAdi Delta Electrical activity of the diaphragm, TIvent ventilator inspiratory time, NVE neuroventilatory efficiency, calculated as tidal volume divided by ΔEAdi, Paw airway pressure. pH and pCO2 from blood gas analysis. The p values were obtained with the Wilcoxon sumrank test