[The study of rhythmic changes in the liver hemodynamics by biophysical methods]

Area of Science:

• Physiology
• Hepatology
• Hemodynamics

Context:

• Understanding portal blood flow is crucial for liver function.
• Previous research has explored various methods for measuring liver blood flow.
• The relationship between portal hemodynamics and biliary function requires further investigation.

Purpose:

• To present data on portal blood flow.
• To investigate the relationship between portal blood flow and bile flow velocity.
• To identify patterns and oscillations in liver blood flow dynamics.

Summary:

• Utilized in vitro, in situ, and in vivo methods including perfusion volume velocity, flowmetry, and photoplethysmography to estimate portal and parenchymal blood flow.
• Observed regular oscillations in portal parenchymal blood flow with periods ranging from 20 to 90 seconds.
• Found synchronous oscillations in bile flow velocity corresponding to the portal blood flow fluctuations.

Impact:

• Provides novel data on the dynamic nature of portal blood flow.
• Suggests a potential link between portal hemodynamics and biliary secretion regulation.
• Opens avenues for further research into the physiological mechanisms governing liver blood flow and bile production.