[Hyperbaric oxygen therapy in rats submitted to hepatic veins ligation: mortality valuation and histological study of liver and spleen].
OBJECTIVE
To evaluate the effects of hyperbaric oxygen therapy in rats submitted to instantaneously hepatic vein obstruction.


METHODS
30 Holtzman adult male rats were utilised, distributed into two groups: 1) hepatic vein obstruction; 2) hepatic vein obstruction associated with hyperbaric oxygen therapy. General anaesthesia was utilized by a solution composed of ketamine chloride (40 mg/ml) and meperidine chloride (10 mg/ml) in a dose of 50/mg/weight, applied into the right gluteus muscle. The animals belonged to group 2 were submitted to hyperbaric oxygen therapy, 8 hours after the operations, in a 2,5 atmosphere, which lasts 120 minutes per day, in consecutive 20 days. The statistical analysis was made in relation to mortality and histological study of livers and spleens utilizing the Fisher test, and the results were considered statistically significant when p < 0.05.


RESULTS
Occurred seven (46.67%) deaths between animals belonged to group 1 and no deaths in the animals belonged to group 2. The histological studies made in the livers and spleens of the animals belonged to group 1 showed many alterations in the following percentages: thrombosis of hepatic, portal and center-lobular veins in five (33.3%), very extensive necrosis of liver cells in seven (46.7%), and light in eight (53.3%), Kupffer cells developed and hypertrophied in 14 (93.3%), high congestion of the spleen purple in six (40.0%) and moderate and severe hemossiderinosis spleen in 14 (93.3%). The analysis of this parameters in the group 2 only showed light necrosis of liver cells, Kupffer cells light developed and hypertrophied, moderated congestion of the spleen purple and light hemossiderinosis spleen. All these parameters analysed showed significantly difference (p < 0.05) between these two groups.


CONCLUSIONS
It could be concluded that the hyperbaric oxygen therapy applied in rats, with instantaneously hepatic vein obstruction decreased their post-surgical mortality and their early deleterious effects in the liver and spleen.
Universidade de Minas Gerais.
Ricardo
R
Costa-Val
Tarcizo Afonso
TA
Nunes
Roberto Carlos de
RC
Oliveira e Silva
Tatiana Karina De Puy e
TK
Souza
D000818:Animals; D006502:Budd-Chiari Syndrome / Q000401:mortality / Q000628:therapy*; D004195:Disease Models, Animal; D006931:Hyperbaric Oxygenation; D008099:Liver / Q000473:pathology / Q000503:physiopathology; D008297:Male; D011169:Portal Vein / Q000473:pathology / Q000503:physiopathology; D011182:Postoperative Care; D011897:Random Allocation; D051381:Rats; D013154:Spleen / Q000473:pathology / Q000503:physiopathology