Arterial resistivity index
The arterial resistivity index (also called as Resistance index, abbreviated as RI), developed by Léandre Pourcelot , is a measure of pulsatile blood flow that reflects the resistance to blood flow caused by microvascular bed distal to the site of measurement.
| Arterial resistivity index | |
|---|---|
Arterial resistivity index (right) from retinal laser Doppler imaging (left). | |
| Purpose | measure of pulsatile blood flow |
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