For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
Vascular & interventional
Resistive Index (Doppler)
Resistive (Pourcelot) index from a spectral Doppler waveform. Commonly used in native and transplant kidneys; a native renal RI ≥ 0.70 is generally elevated.
Result
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Enter all values to calculate.
Formula
RI = (PSV − EDV) ÷ PSV.
References
Disclaimer
RI is influenced by heart rate, systemic vascular resistance, and technique. Interpretation and thresholds are organ- and context-specific.
For educational and reference use only. These calculators do not replace clinical judgement, local protocols, or a qualified clinician. Verify every result independently before it informs patient care.
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