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5-46
Inspiratory resistance
Static compliance
For further information on the logic and how monitoring the
ventilation parameters, make reference to the chapter 7.
WARNING! Risk of injury for the patient.
All the pictures and the examples shown in the present chapter
have the mere purpose of being an example and they do not make
any reference to real clinical cases.
This is the parameter of lung mechanics
that describes the resistance to the flow
opposed by the airways: it is measured in
cmH
O/(l/s).
2
The higher the patient's resistance, the
higher the pressure that must be applied to
the airways to achieve the same volume.
The algorithm used by the ventilator to
calculate inspiratory resistance is as
follows:
Ri = (peak pressure - pause
pressure) / inspiratory flow.
This is one of the two lung mechanics
parameters: it is measured in ml/cmH2O.
It allows an estimation of lung elasticity:
the higher the compliance, the greater the
"elasticity" of the lungs; the lower the
compliance, the greater the "rigidity" of the
lungs.
Static compliance is measured with the
following algorithm:
CS = Inspired tidal volume / pause
pressure
User's Manual, version DU3300105
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