ABSTRACT
Clinical-experimental basis of the possibility of application of the method of indirect rheography of head (IRH) in wide clinical practice was presented. Estimation of the results reproduction and accuracy of the method was performed too. 40 healthy individuals of both sexes at the age of 18-50 and 102 patients with spinal osteochondrosis, arterial hypertension and neurocirculatory dystonia were examined. It was determined that IRH provided 93% of results reproduction and its precision was 90% and higher in comparison with ultrasound method. It was established that head circulation was 750-1200 ml/min or 12-24% of cardiac output in healthy individuals. The results of the study of head blood circulation in some groups of patients were also discussed.
Subject(s)
Cerebrovascular Circulation , Head/blood supply , Plethysmography, Impedance/methods , Adolescent , Adult , Aged , Cervical Vertebrae , Female , Humans , Male , Middle Aged , Neurocirculatory Asthenia/physiopathology , Osteochondritis/physiopathology , Plethysmography, Impedance/statistics & numerical data , Reference Values , Reproducibility of Results , Spondylitis/physiopathologyABSTRACT
More accurate definition of the leading factors of development of discirculatory encephalopathy (DE) in patients with arterial hypertension was the aim of this investigation. The analysis of correlations between clinical and computer tomographical symptoms of DE on the one hand and the indices of central hemodynamics, head blood circulation and presence of atherosclerosis of head arteria on the other hand was performed. It was found that congestion in head venous system was the main factor in DE development. The conclusion was made that both atherosclerosis of head arteria and arterial hypertension promoted venous congestion in head by means of decreasing the amplitude of arterial pulsation and in turn the development of DE. Meanwhile, the increase of minute blood flow prevents it.
Subject(s)
Cerebrovascular Disorders/etiology , Hypertension/complications , Arteriosclerosis/complications , Arteriosclerosis/diagnosis , Arteriosclerosis/physiopathology , Brachiocephalic Trunk , Brain/blood supply , Cerebrovascular Disorders/diagnosis , Cerebrovascular Disorders/physiopathology , Hemodynamics , Humans , Hypertension/diagnosis , Hypertension/physiopathology , Intracranial Arteriosclerosis/complications , Intracranial Arteriosclerosis/diagnosis , Intracranial Arteriosclerosis/physiopathology , Venous Insufficiency/complications , Venous Insufficiency/diagnosis , Venous Insufficiency/physiopathologyABSTRACT
The state of venous and lymphatic beds of extremities was studied in rabbits after resection of fragments of main veins and extirpation of popliteal lymph nodes in different series of experiments or in a single step. It has been established that independent of the kind of surgery the total drainage bed of the extremity is changed. Compensation of the disturbed outflow is realized due to development of collateral pathways and direct anastomoses in both beds as well as due to inclusion of paravasal collectors. The terms of recovery of the oxygen strain in muscles, chronaxy and rheobase of muscles as well as the time of passing labeled albumin through the foot-pelvis region (radio-isotope method) are objective criteria for estimation of the functional sufficiency of collateral pathways.
