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Description
Using BIPAP
As for IPPV, the time pattern is set using the basic setting parameters,
frequency f and I:E ratio. The resulting inspiration and expiration times are
calculated by Evita 2 and displayed in the bottom screen below the curve
setting. As for all ventilation modes, the lower pressure level is set with the
parameters PEEPKPAP,
the upper pressure level with the parameter piw
Only the p&pi.lp
setting needs to be changed to switch over from the IPPV
mode to the BIPAP mode as the time remains the same.
The steepness of increase from the lower pressure level to the upper
pressure level is controlled by using the rotary knob A . The operative time
for the increase in pressure cannot become greater than the set inspiratory
time, TI, thus guaranteeing
that the upper pressure level is reached safely
during inspiration. The transition from controlled ventilation, via the weaning
phase, to complete spontaneous breathing is achieved by a gradual reduction
of inspiratory pressure, pinap, and/or frequency, f.
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