layout: default title: Mechanical Power Calculator —

Mechanical Power Calculator

This calculator estimates the mechanical power delivered to the respiratory system using Becher's simplified equation for pressure-controlled ventilation (PCV). Mechanical power represents the energy transferred from the ventilator to the patient per minute and has implications for ventilator-induced lung injury (VILI).

Clinical Note: Higher mechanical power values (>17 J/min) may increase the risk of VILI in ARDS patients. Values should be normalized to predicted body weight (PBW) or lung-thorax compliance (LTC) for better interpretation.

Ventilation Parameters

Respiratory Rate (breaths/min): 12

Typical range: 12-20 breaths/min

Tidal Volume (L): 0.5

ARDS protocol: 4-8 ml/kg PBW

ΔPinsp (cmH₂O): 15

Change in airway pressure during inspiration

PEEP (cmH₂O): 5

Positive end-expiratory pressure

Calculations

Mechanical Power (Becher's Equation)

MP = 0.098 × RR × Vt × (ΔPinsp + PEEP)

Where 0.098 is the conversion factor to Joules/minute

Waiting for input...

PBW-Normalized MP

Predicted Body Weight (kg):

Enter PBW to calculate

LTC-Normalized MP

Dynamic Lung-Thorax Compliance (mL/cmH₂O):

Enter LTC to calculate