Relevance. Adequate blood circulation in the tissues during healing of fractures is a factor in achieving positive results in the treatment of patients. Purpose of the study. In an in vivo experiment, to study the features of the temperature response and blood circulation in the area of ​​fusion of the primary and repeated fractures of the tibia during the growth period. Material and methods. Rats (n = 36) model a fracture of the tibia, recorded by the outer structure. In series 1, fixation continued until union. In series 2, 21 days after the operation, refracture was modeled and re-fixed until union. We studied blood circulation and tissue temperature in the projection of the fracture: in the norm; 21 and 35 days after fracture or refractory; 28 days after termination of fixation. Results. The temperature and blood circulation were of the same type, but of different severity. Three types of reaction were identified: 1) reduced blood flow velocity and tissue temperature, increased venous outflow; 2) increased blood flow velocity, unchanged venous outflow, reduced tissue temperature; 3) a slight decrease in blood flow velocity, increased venous outflow, a slight increase in tissue temperature. By the end of fixation in series 1, the parameters returned to normal. In series 2, 28 days after the termination of fixation in animals with the first and second types of hemodynamics, the temperature of tissues and venous outflow returned to normal, and the blood flow rate decreased. In the third type, the temperature of the tissues returned to normal, the venous outflow increased, and the rate of blood flow increased. Conclusion. When the primary fracture is fought, the blood circulation and tissue temperature normalized to the end of the fixation, and with refracturas a month after the termination of the fixation, the changes were preserved.

Introduction Diagnosis and treatment of children with multiple injuries of the bones that form the elbow joint is a relevant problem in pediatric traumatology. Due to the high variability of the cases encountered, it is necessary to differentiate the volume, timing and sequence of surgical interventions, as well as the duration of fixation of the injured limb with immobilizing means. The aim of the work was to study the dependence of long-term anatomical and functional treatment results in children with multiple fractures around the elbow joint on the type of injury. Materials and methods The medical records of 82 pediatric patients with multiple injuries of the bones forming the elbow joint were studied. The patients involed in the study were divided into two groups. Group 1 were patients with multiple fractures of the bones that make up the elbow joint (35 children), and group 2 were patients with intra-articular fractures of the distal end of the humerus and fracture-dislocations of the forearm bones in the elbow joint (47 children). The results were evaluated using the DASH questionnaire and the Broberg-Morrey rating scale. Results In the first group of patients with multiple fractures of the bones that make up the elbow joint, the anatomical and functional results of treatment were significantly better, and the process of restoring the function of the elbow joint was shorter. The treatment results of patients in the second group largely depended on the severity of the injuries. The use of the Ilizarov method with rational arrangements of the apparatus enables to preserve the function of the elbow joint in the course of transosseous osteosynthesis. In hybrid fixation (the use of pins and apparatus or plaster immobilization and apparatus), patients frequently developed immobilization contracture of the elbow joint and the anatomical and functional results turned out to be worse, since the fixed elbow joint needed long-term rehabilitation. Discussion Multiple injuries of the bones of the elbow joint are highly variable. The treatment of patients with multiple injuries of the elbow joint remains a difficult clinical task, partly because there is no differentiated approach to rehabilitation measures depending on the nature of the injury, and, accordingly, a rational approach to the treatment of this group of patients has not been developed. Due to the fact that most dislocations are usually associated with fractures, accurate diagnosis of the severity of injuries and rational surgical intervention in terms of timing and volume are necessary to achieve good anatomical and functional results. Conclusion Accurate and timely diagnosis of skeletal injuries of the elbow joint and rational determination of treatment tactics are of great importance in pediatric emergency traumatology. They determine the anatomical and functional outcomes of rehabilitation.