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Porto-Systemic Flow Ratio (PSFR) Calculator
Porto-Systemic Flow Ratio (PSFR): Explanation and Clinical Context The Porto-Systemic Flow Ratio (PSFR) quantifies the relative blood flow between the portal vein and the hepatic vein, reflecting the balance of portal and systemic circulation in patients with chronic liver disease and portal hypertension. A PSFR near 1 indicates a normal physiologic balance, whereas deviations may reflect shunting, hepatic congestion