Table 1 Measured, estimate and calculated parameters in the diffusion resistance model
From: Cardiac output estimation using pulmonary mechanics in mechanically ventilated patients
Directly Measured Parameters | Estimated Parameters | Calculated Parameters |
|---|---|---|
Respiratory Frequency (f) | Dead Space (Vd) | Shunt (fs) |
Inspired Oxygen Content (FiO2) | Â | Diffusion Resistance (R) |
Expired Oxygen Content (FeO2) | Â | Â |
Tidal Volume (Vt) | Â | Â |
Atmospheric Pressure (PB) | Â | Â |
Pulse or Arterial Oxygen Saturation (SaO2) | Â | Â |
Cardiac Output (CO) | Â | Â |
Haemoglobin (cHb) | Â | Â |
Methaemoglobin (cMetHb) | Â | Â |
Carboxyhaemoglobin (cCOHb) | Â | Â |