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Animal model of firearm injury to spinal cord in a hot and humid environment and the variations of vial signs

Aim To establish an animal model of firearm injury to spinal in a hot and humid environment and observe the variations of vital signs.Methods Twenty-fourth healthy pigs each weighted 27.53±3.15Kg were randomly divided into a common temperature control group(Group 1),a firearm injury group in common temperature group(Group 2),a a hot and humid environment control group(Group3) and a firearm injury group in a hot and humid environment(Group 4).The animals in Group2 and Group4 were anesthetized and fixed on vulnerating-bench,they were shot on L1 lumbar vertebra,which performed by 81 rifles from a distance of 50m.Then the changes of vital signs were observed.Results The impact of firearm injury on the body temperature,respiratory,blood pressure and heart rate of pigs in the hot and humid environment was significant The fierce respiratory changes,respiratory failure was the main cause leading to the death of the animals.Conclusion The establishment and the observation of variations of vital signs of animal model provided theoretical basis for investigating the pathological and physical variations,early diagnosis and treatment of animals injured by firearm to the spinal cord in hot and humid environment