A perfect metabolic correction of diabetes is essential to completely eradicate long-term chronic complications. Only a total pancreatic graft with portal venous drainage enables such an achievement. Isogenic Lewis rats were used for donors, recipients and controls. Pancreatico-duodenal transplantation was either heterotopic with systemic venous drainage (n = 12) or paratopic with portal drainage (n = 11). All animals were regularly monitored for non-fasting plasma glucose and insulin. Both techniques promptly restored the non-fasting plasma glucose to normal values (p<0.003). Normo-insulinemia (47.4+/-6.4 microU/ml) was obtained in the paratopic group, while the heterotopic group showed hyperinsulinism (132.0+/-15.2 microU/ml). Perfect metabolic control justifies the additional technical difficulties of total paratopic pancreatic transplantation with portal venous drainage.
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