Estimates mechanical energy delivered per breath during volume-controlled ventilation.
Overview
Estimates mechanical energy delivered per breath during volume-controlled ventilation.
Clinical Significance
Provides a simplified estimate of energy transferred to the respiratory system per breath. It is model-dependent and not a direct measure of tissue injury.
How It Is Calculated
- Energy/breath ≈ 0.098 × VT × (Ppeak − 0.5 × PEEP).
Interpretation
- Provides a simplified estimate of energy transferred to the respiratory system per breath. It is model-dependent and not a direct measure of tissue injury.
Worked Example
Enter a clinically consistent set of values in the displayed units. MedicalC applies: Energy/breath ≈ 0.098 × VT × (Ppeak − 0.5 × PEEP).
Limitations
- This tool does not establish a diagnosis or mandate treatment.
- Published cut-offs may vary between cohorts and measurement methods.
- Calculation precision cannot compensate for poor source data.
Clinical Pearls
- Trend the result over time where clinically appropriate.
- Record the source values and units alongside the calculated result.
Common Mistakes
- Using the wrong unit.
- Combining measurements obtained at different times.
- Applying a research-derived threshold as a universal treatment trigger.
Frequently Asked Questions
What does this calculator provide?
Estimates mechanical energy delivered per breath during volume-controlled ventilation.
Can this result be used alone?
No. It must be interpreted with clinical context and appropriate investigations.
What equation is used?
Energy/breath ≈ 0.098 × VT × (Ppeak − 0.5 × PEEP).
What is the main limitation?
The result depends on valid inputs and may not be calibrated for every population or setting.
References
- Gattinoni L et al. Ventilator-related causes of lung injury: the mechanical power. Intensive Care Med. 2016. — Formula, physiological or validation reference.
Reviewed by: MedicalC Clinical Editorial Team
Last reviewed: July 2026