Mechanical Ventilation Calculators

Mechanical Power

Pmus

Mean Airway Pressure

Respiratory Mechanics

Dead Space

ROX Index

Coming soon

Mechanical Power in Volume Controlled Ventilation with constant flow (mM, Daoud)

Mechanical Power in Pressure Controlled Ventilation (mM, Daoud)

Mechanical Power in Volume or Pressure Controlled Ventilation (mM, Daoud)

Mechanical Power in Volume Controlled Ventilation with constant flow (Gattinoni)

Equation: 𝑀𝑃 = 0.098 x RR x VT x (𝑃𝑝𝑒𝑎𝑘 − (𝑃𝑝𝑙𝑎𝑡 − 𝑃𝐸𝐸𝑃) 2)

Reference: Ventilator-related causes of lung injury: the mechanical power

Mechanical Power in Pressure Controlled Ventilation (Becher)

Equation: MP = 0.098 x RR x VT x (∆P_insp + PEEP)

Reference: https://link.springer.com/article/10.1007/s00134-019-05636-8

Estimating Pmus from P0.1

Equation: Pmus = – 2.99 x (P0.1) + 0.53

Reference: Estimating actual inspiratory muscle pressure from airway occlusion pressure at 100 msec

Mean Airway Pressure in Volume Control Ventilation with constant flow

Equation: Paw = 0.5 X (PIP – PEEP) X (TI/Ttot) + PEEP

Reference: Respiratory mechanics in mechanically ventilated patients

Mean Airway Pressure in Pressure Control Ventilation

Equation: Paw = (PIP – PEEP) X (TI/Ttot) + PEEP

Reference: Respiratory mechanics in mechanically ventilated patients

Mean Airway Pressure in APRV

Equation: Paw = (P High x T High) + (P Low x T Low) / (T High + T Low)

Reference: Airway pressure release ventilation

Respiratory System Static Compliance

Equation: Crs = VT / (Pplat – PEEP T)

Reference: Can you calculate the total respiratory, lung, and chest wall respiratory mechanics?

Lung Compliance

Equation: = VT / End inspiratory PPL – End expiratory PPL

Reference: Can you calculate the total respiratory, lung, and chest wall respiratory mechanics?

Alveolar Compliance

Equation: Alveolar compliance = VT – VDanat / Trans-alveolar DP

Reference: Alveolar mechanics: A new concept in respiratory monitoring

Chest Wall Compliance

Equation: Chest Wall Compliance = VT / End inspiratory Pes – End expiratory Pes

Reference: Alveolar mechanics: A new concept in respiratory monitoring

Total Inspiratory Resistance

Equation: Resistance = (PIP – Pplat) / Insp Flow

Reference: Can you calculate the total respiratory, lung, and chest wall respiratory mechanics?

Dead Space

Equation: Dead space volume = VD = VT x (PaCO2 – PeCO2) / PaCO2

Reference: Physiology, Lung Dead Space

ROX Index

Equation: ROX Index = SpO₂/FiO₂ / Respiratory rate

Reference: Predicting success of high-flow nasal cannula in pneumonia patients with hypoxemic respiratory failure: The utility of the ROX index