Chapter 13
13-66 Respironics V200 Ventilator Operator’s Manual REF 1057983 A
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Dynamic Resistance
Dynamic resistance is calculated using this equation.
Where:
n = Number of samples taken during for the calculation
i = Sample number
Qi = Patient flow
Vi = Lung volume for the /th sample number
Pi = Pressure sensor measurement for the /th sample number
Static C and R
Static C and R are calculated using these equations:
Where:
RL
QiVi∗PiViPiQi∗Vi
i0=
n
∑
i0=
n
∑
–
i0=
n
∑
i0=
n
∑
QiVi
i0=
n
∑
2
Qi
2∗
i0=
n
∑Vi
2
i0=
n
∑
–
------------------------------------------------------------------------------------------------=
Qi∗td
∫
=
CLV
Peplat P0
–()
--------------------------------=
CRL
Pei Peplat PVplat CL
⁄–()–()
QLend
------------------------------------------------------------------------=