RESUMO
A presente pesquisa visou estudar a interposiçäo de um segmento de carótida homógena, preservada em glicerina, na artéria femoral de cäes. Foram utilizados 18 cäes mestiços, adultos, separados em três grupos, e observados por 15 dias (grupo I), 30 dias (grupo II) e 45 dias (grupo III). Três outros cäes foram observados por 75 dias (grupo IV). Os enxertos foram preservados em glicerina 98 por cento, por período de 60-180 dias. As artérias foram implantadas com auxílio de microscópio cirúrgico em magnificaçäo de 6x e foram avaliadas por inspeçäo clínica, arteriográfica e histopatológica. Foi observada invasäo mononuclear da adventícia, ausência de células na média e progressiva diminuiçäo nas células musculares lisas, com deposiçäo de fibras colágenas. Näo foram evidenciados sinais clínicos ou histopatológicos de reaçäo imunológica
Assuntos
Animais , Masculino , Adulto , Cães , Cirurgia Geral , Glicerol , TransplantesRESUMO
During 1977, 4,976 oil and gas wells were drilled in Oklahoma to an average depth of 4,892 feet. There were 2,253 successful oil wells and 1092 successful gas wells (26). The Oklahoma Animal Disease Diagnostic Laboratory investigated several cases where livestock in close proximity to drilling sites became ill or die. The case histories emphasize the need for a careful and complete diagnostic work-up. The identification and quantification of petroleum hydrocarbons, toxic chemicals and heavy metals in intestinal contents and tissues are diagnostically significant. The most difficult cases involve chronically ill and poor-doing animals following exposure to oil field wastes. The potential for litigation exists whenever cattle in close proximity to drilling and production sites become ill or die. Many of these cases could be prevented if livestock were prevented access to such sites by fencing or other means. The circumstantial evidence in many cases suggests the need for additional research on the toxicity of petroleum hydrocarbons, drilling muds and other oil dield wastes. Improves diagnostic methods should benefit both the livestock and oil industries.
