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Orbital "blow-out" Fractures in Dogs Produced by Air Blast
註釋Reported here are 11 cases of orbital "blow-out" fractures involving 9 of 115 dogs that were subjected to shock tube- produced air blast. Usually, there was failure of the frontal, palatine, sphenoid and lacrimal bones- fragments of which were displaced medially and anteriorly into the nasal fossa with extension into the frontal and maxillary paranasal sinuses. In one instance there was extension into the cranial vault. Eye signs, in the form of proptosis of the globe, subconjunctival hemorrhage, ecchymotic areas of the globe and hemorrhage into the intra-orbital soft tissues, were found associated with all cases of orbital fracture. The pressure-time histories in which animals did or did not sustain orbital fractures are illustrated along with a tabulation of the corresponding pressure-time parameters.