[The transosseous osteosynthesis of proximal humeral metaepiphyseal fractures in elderly patients].

93 elderly patients with proximal metaepiphyseal fractures of humerus underwent the transosseous osteosynthesis with the use of device, constructed by A.I. Gorodnichenko. 1 year follow-up results were obtained in 44 patients. Good and satisfactory results were registered in 33 and 11 patients, respectively. The use of the method allowed better long-term treatment results and higher quality of life of the operated patients.

[Endoprosthetic hip replacement in elderly patients with femoral neck fractures].

96 primary endoprosthetic hip replacements were performed in elderly patients with femoral neck fractures. The average age of the patients was 82,7 years. In cases of senile osteoporosis cement <> prosthesis was applied, when there were no signs of osteoporosis defined, non-cement <> construction was used. 53 (55,2%) patients were postoperatively followed-up during 1 to 7 years. Excellent result was achieved in 17 (32,1%) patients (>90 points on Harrison's scale), good result was registered in 21 (39,6%) patients (80-89 points), considered to be satisfactory (70-79 points) - in 15 (28,3%) patients.

[Use of modern fixators in trochanteric fractures treatment].

Results of surgical treatment of trochanteric fractures in 225 aged patients are presented. The DHS system was used in 115 (51,5%) patients, core system constructed by A.I. Gorodnichenko was used in 56 (24,9%), PFN and PFN-A fixators used in 45 (20%) and 9 (4%) patients were treated with the use of DCS system. Follow-up results after 1 year were studied in 183 (81,3%) patients. Excellent results achieved in 145 (79,2%) cases, satisfactory outcome registered in 38 (20,8%). Authors recommend PFN and PFN-A fixators, as well as the A.I. Gorodnichenko's core system for the surgical treatment of trochanteric fractures especially in aged patients with concomitant ostheporosis.

[The social organization, behavior and ecological parameters of a migrating population of Siberian roe deer (Capreolus pygargus Pall.)]. / Sotsial'naia organizatsiia, povedenie i ékologicheskie parametry migriruiushchei populiatsii sibirskoi kosuli (Caprolus pygargus Pall.).

Data obtained in 1988-1994 during a long-term study of the ecology and behavior of a seasonally migrating Siberian roe population in Amur Province are reviewed. Aerial surveillance of 24 roe marked with transmitters was used for tracing their migration routes under normal conditions and in the homing experiment. It was found that the routes of roe migrations can be as long as 200 km. These routes, as well as summer and winter territories and the sites where roe cross the rivers, remain unchanged year after year. In spring, roe migrate back along the same route as in autumn. In autumn, the average rate of migration is 6.1 km per day (the maximum rate is 26 km per day), and in summer it is 3.8 km per day. The urge to migrate is apparently innate. The roe memorize the route followed once and are capable of orienting themselves on expanses of land. The first frosts provide a stimulus for autumn migrations. Most roe start to migrate 30-45 days before the formation of snow cover, when forage is still abundant. This fact contradicts traditional views on roe migrations, which fall into the following scheme: thick snow cover; the absence of forage; migrations. A new hypothesis concerning the evolution of roe migrations is proposed. The social, sex, and age structures of the population are analyzed.