Hepatorenal syndrome. Definition, pathophysiology, and intervention

Area of Science:

• Hepatology
• Nephrology
• Critical Care Medicine

Background:

• Hepatorenal syndrome (HRS) is a severe complication of advanced liver disease.
• It involves splanchnic vasodilation and renal vasoconstriction, often leading to fatal outcomes without liver transplantation.
• Orthotopic liver transplantation (OLT) is the definitive treatment for HRS.

Purpose of the Study:

• To review current extracorporeal blood purification techniques for patients with HRS awaiting OLT.
• To evaluate the efficacy of these interventions in improving patient outcomes.
• To explore future therapeutic prospects for bridging patients to liver transplantation.

Main Methods:

• Review of existing extracorporeal blood purification techniques, including continuous hemofiltration, therapeutic plasma exchange, and hemoperfusion.
• Assessment of the impact of these therapies on patient consciousness, mortality, and hepatic regeneration.
• Discussion of emerging strategies like bioartificial liver support systems and pharmacologic hemodynamic manipulation.

Main Results:

• Extracorporeal therapies, particularly continuous hemofiltration, may improve consciousness levels in HRS patients.
• These interventions have not demonstrated a significant effect on mortality rates or hepatic regeneration.
• Current methods serve as supportive care rather than definitive treatments for HRS.

Conclusions:

• While extracorporeal therapies offer symptomatic relief by improving consciousness, they do not alter the fatal trajectory of HRS.
• Novel approaches, including hybrid bioartificial liver support and targeted pharmacologic interventions, are crucial for developing effective bridging strategies to OLT.
• Further research is needed to improve survival and regenerative outcomes in patients with hepatorenal syndrome.