Ventricular Assist Device VAD H-Q Calculator
Cardiovascular bioengineering & artificial heart mechanics: Evaluate Left Ventricular Assist Device ($LVAD$) pressure-flow curves ($H-Q$), hydraulic power, and shear hemolysis index.
Rotor Speed & Target Hemodynamics
Clinical set speed
Pressure Head & Operating Point
Aortic pressure (pump discharge)
Cannula suction pressure (preload)
Rotary Blood Pump Affinity Laws
The differential pressure head across the impeller follows:
$$\Delta P = a \cdot \omega^2 - b \cdot \omega \cdot Q - c \cdot Q^2$$
Centrifugal VADs exhibit flatter $H-Q$ curves with greater flow sensitivity to patient blood pressure variations than steep axial pumps.
Pump Operating Point
Estimated Pump Flow (Q)
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Differential Head (ΔP)
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Power & Blood Trauma
Hydraulic Blood Power
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Q · ΔP delivered to circulation
Normalized Hemolysis (NIH)
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Target: < 0.010 g/100L
Clinical Hemodynamic State
Cardiac Index Support (BSA ~1.9 m²):
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Suction / Collapse Hazard:
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Operating Regime:
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