EXTRA- AND INTRAORGANIC VASCULARIZATION OF THE TARSAL JOINT CAPSULE OF THE DOG

The results of the study of the sources of extraordinary vascularization of the dog tarsal joint capsule, as well as the features of the hemomycrocirculatory bed of the capsule relative to its anatomical surfaces (dorsal, medial, plantar, lateral), are described in the article. The comparison of the intensity of vascularization of each of the surfaces is described, and the features of branching of blood vessels, their location relative to other structural elements of the capsule of the joint are described. Since the subject of vascularization of the tarsal joint remains unsolved, although the circulatory channel of the pelvic limbs of the fingertips has been studied and described by many scientists, we have investigated the features of branching of the major vessels of the pelvic limb of the dog in the area of the tarsal joint, as well as the intraorganic topography of the vascular structures in the capsule of this joint. Knowledge of surfaces with the greatest number of structures of the hemomycrocirculatory bed and zones of the location of the vascular fields will give an idea of the intensity of metabolic processes in different parts of the joint. The optimal functioning of synoviotic cells of the tarsal joint capsule directly depends on the innervation and vascularization of the capsule of the joint. We have found that extraordinary blood supply to the dog's tarsal joint capsule occurs at the expense of the caudal tibialis artery (a. tibialis caudalis), the superficial branch of the cranial tibialis artery (a. cranialis tibialis), the branches of the cranial artery of the saphen (a. saphena) and the medial and lateral mucous tarsal arteries (a. lateralis and medialis carpi). As a result of the microscopic examination of the capsule of the tarsal joint of the dog, it has been established that the lateral surface of the dog's tarsal joint capsule has the largest structure of the hemomycrocirculatory bed, which forms vascular fields, the capillaries form arches, gyrus and anastomoses. The vessels of the fibrous membrane of the plantar surface pass between the thick collagen fibers in the dense connective tissue and form glomeruli and ampul-formed enlargements, which may serve as a kind of blood depot