[Preservation of rat liver using prolonged perfusion with a complex solution lacking hemoglobin].

Area of Science:

• * Organ transplantation and preservation
• * Surgical research
• * Physiology

Background:

• * Effective organ preservation is critical for successful transplantation.
• * Continuous perfusion is a method for maintaining organ viability ex vivo.
• * Understanding factors influencing organ conservation is essential.

Purpose of the Study:

• * To investigate the effects of hypothermia on isolated rat liver conservation.
• * To compare normal temperature perfusion with hypothermic perfusion.
• * To evaluate the impact on perfusion rate, metabolic markers, and fibrin deposition.

Main Methods:

• * Isolated rat liver perfusion using a hemoglobin-free solution.
• * Perfusion conducted at normal temperature and under hypothermia.
• * Evaluation of perfusion rate, lactate, and pyruvate concentrations.
• * Histological examination for fibrin deposition and microaggregate formation.

Main Results:

• * Hypothermia demonstrated positive effects on liver conservation.
• * Reduced metabolic demands (lactate and pyruvate) observed under hypothermia.
• * Significant reduction in fibrinogenesis and intra-hepatic microaggregate formation with hypothermia.

Conclusions:

• * Hypothermia is beneficial for isolated rat liver preservation.
• * Benefits extend beyond reduced metabolic rate to include decreased fibrin deposition.
• * Hypothermic perfusion offers improved conservation by mitigating microaggregate formation.