MATHEMATICAL MODELLING OF NON-INVASIVE PRESSURE SUPPORT VENTILATION: INVESTIGATION OF TIDAL VOLUME INSTABILITY - Quantitative Medical Data Analysis Using Mathematical Tools and Statistical Techniques - page 295

a

0.5 Boundaries of Instability in PSV

R = 20 cmH 2 O

f = 14

L s

0.4 f = 16

Stable

0.3

f = 18

f = 20

0.2

f = 22

Unstable

0.1

0.11 0.12 0.13 0.14 0.15 C

0.08 0.09 0.1

Fig. 8. Boundaries of instability in PSV where resistance = 20 cmH 2 O/L/s, f =
14, 16, 18, 20, and 22 breaths/min (gure taken from Dries et al., 2001).