Purpose: Previous studies have shown dietary supplements of vitamin E to reduce the incidence of postoperative peritoneal adhesions. The objective of this study was to show the effect of intramuscular or intraperitoneal administration of vitamin E on peritoneal adhesions.
Methods: Eighty rats were divided into four groups: Group A (control), Group B (intramuscular vitamin E), Group C (intraperitoneal olive oil, the vehicle/diluent of vitamin E), and Group D (intraperitoneal vitamin E diluted in olive oil). The same experimental method was used in all rats to produce adhesions, consisting of cecal abrasion and ligature of the adjacent parietal peritoneum. The rats were killed at 14 days to assess the adhesions occurring. The results were analyzed using a chi-squared test.
Results: All animals in Groups A, B, and C had substantial adhesions. In Group D, 11 rats had insubstantial adhesions and only 4 had substantial adhesions. There were no significant differences between Groups A, B, and C in terms of percent formation of adhesions. A significant difference was found between Group D (vitamin E plus olive oil by the intraperitoneal route) and each of the experimental groups, A, B, and C (P < 0.0005).
Conclusions: Our results show that intraperitoneal administration of vitamin E just before closing the laparotomy was effective for reducing adhesion formation. By contrast, the same effect was not achieved after intramuscular administration.
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