(Model K) Page 107
17.9 Wave shaping for leading and trailing edge of insp. phase
a) Set up the ventilator to CMV mode and set the following parameters:
BPM to 25
Insp. time to 1.5 sec
Set the PIP control to 20 mbar
Set the PEEP to 0
b) Using the insp leading edge adjustment controls, shape the
leading edge to produce a square response.
Starting with the insp leading edge calibration values for the
fast and slow rise times set to zero, and the F/S balance set
to 255.
Increase the fast rise time until the pressure waveform does
not dip below the plateau.
Increase the slow rise time to minimise the initial spike
(probably somewhere between 10 and 20)
Decrease the F/S balance until the waveform is square.
c) Using the insp. trailing edge adjustment controls, shape the trailing edge to
reduce overshoot.
d) Increase the exp leading edge, slow rise time control to
minimize the overshoot on the fall waveshape.
To Next Page
Loading...
