In the liver transplantation pathophysiology of hepatic ischaemia and reperfusion lesion is not completely understood. Several experimental models have been used to perform studies on tissue hipoxia and reperfusion of the liver. The present work, presents a modified model proposed to evaluate this kind of lesion. Twenty mongrel dogs, weighting 15.25 ± 1.21 kg, under general anesthesia, were referred to the following investigation groups: 1. Test Group (n = 10) - Animals were submitted to devascularization of 70 per cent of hepatic mass during a ninety minutes period, followed by liver reperfusion. During the time of ischaemia, splancnic venous decompression was provided through the right lateral and caudate lobes; 2. Control Group (n = 10) - The dogs were submitted to a sham operation. Liver samples were taken at 5 minutes before ischaemia (T0) 5 minutes before reperfusion (T1) and I hour (T2) and 5 hours (T3) after hepatic reperfusion. The method was evaluated by hepatic cells necrosis (HCN), hepatic glycogen content (HGC) and tissue polymorphonuclear cells counting (PMNCC). The results showed with a 95 per cent of confidence that: I. There was a progressive rise in HCN intensity and a fall in HGC, during the hepatic ischaemia and reperfusion stages; 2. There was no evidence of significant differences in PMNCC between the investigated groups. The verified histologic change are expression of effective HCN derived from liver isquemia and reperfusion.
Liver; Normothermic ischaemia; Reperfusion; Hepatic necrosis; Hepatic glycogen; Polymorphonuclear cells; Dogs