Radiographic evaluation of cardiac silhouette using vertebral heart size method in squirrel monkey (Saimiri sciureus)

Federal Rural University of Amazonia; State University of São PauloFederal Rural University of Amazônia. Institute for Animal Health and Production. Belém, PA, Brazil.State University of São Paulo Júlio de Mesquita Filho. School of Agriculture and Veterinary Sciences. Jaboticabal, SP, Brazil.Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Centro Nacional de Primatas. Ananindeua, PA, Brasil.Federal University of Lavras. Veterinary Medicine Departament. Lavras, MG, Brazil.Federal Rural University of Amazônia. Institute for Animal Health and Production. Belém, PA, Brazil.Federal Rural University of Amazônia. Institute for Animal Health and Production. Belém, PA, Brazil.Federal Rural University of Amazônia. Institute for Animal Health and Production. Belém, PA, Brazil.Background: The Saimiri sciureus represents a valuable resource for biomedical research, due to its large number on primate centers and similarity to human anatomy and physiology. The aim of this study was to apply the method proposed by Buchanan & Bücheler in healthy squirrel monkeys (S. sciureus) and determine by radiographic examination, the average value of the vertebral heart size (VHS) for the specie. Method: Laterolateral left (LLL), laterolateral right (LLR), ventrodorsal (VD), and dorsoventral (DV) projections were used for radiographic examinations to evaluate the heart silhouette of S. sciureus. Results: There was no statistical difference between the projections LLL and LLR, or VD and DV, and between males and females, so measurements in the four radiographic projections were not performed. Conclusion: The values obtained in VHS of S. sciureus showed up species specifi

Comparison of the proximal tibial angles between Labrador Retrievers and other dog breeds with and without cranial cruciate ligament rupture

ABSTRACTThe influence of the proximal tibia conformation in the rupture of the cranial cruciate ligament (CCL) in dogs is still controversial, especially in Labrador Retrievers. The aim of this study was to compare the angles of the proximal tibia between Labrador Retrievers and other large breeds of dogs, both groups with and without CCL rupture. Radiographic images of 64 stifle joints were obtained and divided into four groups of 16 images. Group 1 consisted of Labrador dogs without orthopedic disorders, group 2 consisted of Labrador dogs with CCL rupture, group 3 consisted of dogs of various large breeds without orthopedic disorders, and group 4 consisted of dogs of various large breeds with CCL rupture. The radiographs were performed in mediolateral projection with the stifle joint positioned at an approximate angle of 135°. The tibial plateau angle showed an overall average of 22.17°±4.20°, and there was no statistically significant difference between the groups. The patellar ligament angle in relation to the tibial plateau had a mean of 103°±4.20°, and there was a significant difference between groups 1 and 4. The patellar ligament angle in relation to the common tangent at the tibiofemoral contact point showed an average of 99.06°±6.08°, and there was no difference between the groups. The patellar ligament insertion angle had an overall average of 51.45°±5.06°, and there was a significant difference between the two groups of normal dogs and two groups of ruptured dogs. In conclusion, the tibial plateau angle, the patellar ligament angles and the patellar ligament insertion angle do not seem to be predisposing factors for rupture of the CCL in Labrador Retriever dogs. In general, there seems to be no relationship between the angles of the proximal tibia and the CCL rupture in dogs