[Postural reactions of the circulatory system in patients with extrapulmonary tuberculosis]. / Postural'nye reaktsii sistemy krovoobrashcheniia u bol'nykh vnelegochnym tuberkulezom

The main cause of occurrence of postural reactions in patients with extrapulmonary tuberculosis is a deficit of blood circulatory volume as well as cerebrospinal disturbances and "harmful" peculiarities of the operative posture. An increase of the circulatory volume by infusion of 0.5-1.0 litres of plasma substituting substances prior to patient's being rendered the operative posture liquidates, to a great extent, postural reactions of the circulatory system.

[Changes in the microcirculatory bed of the compact substance of bones following local mechanical pressure, gravitational stress and hypokinesia]. / Izmeneniia mikrotsirkuliatornogo rusla kompaktnogo veshchestva kostei pri mestnom mekhanicheskom davlenii, gravitatsionnykh peregruzkakh i gipokinezii

Effects of different stimuli upon the structure of the microcirculatory bed of the compact substance of long tubular bones were studied in 89 animals (rabbits and cats). Prolonged local pressure on the bone resulted in transformations characterized by lacunar resorption of the compact substance in the site of application of the force and endosteal bone-formation on the opposite side of the same part of the bone. Hypergravitation caused a considerable transformation of the microcirculatory bed and the histoarchitectonics of the bone compact substance. Smooth and linear perivascular resorption took place around dilated vessels in osteon canals. It resulted information of resorption cavities. In addition, processes of bone formation took place. Due to effects of hypokinesia the transformation of the compact substance is of a regressive character. The fibrous structures of the bony tissue and blood vessels lose their regular orientation and acquire chaotic direction.

[Effect of hypokinesia on the development of osteoporosis]. / Vliianie gipokinezii na razvitie osteoporoza

The skeletal changes in the rabbits exposed to a 90-day hypokineisa have been examined. Osteoporosis has been diagnosed using an X-ray investigation which included rentgen-densitometry and rentgen-grammetry. The process involved the thinning of the cortical layer and a decrease of the bone density. The importance of the above methods for an objective evaluatuon of osteoporosis is discussed.