PRECISION ASSESSMENT OF THE STATE OF BONE TRABECULAE AND MINERAL SATURATION OF BONE SPONGY STRUCTURES IN WORKERS EXPOSED TO CONTACT ULTRASOUND

Author(s):  
V.N. Druginin ◽  
◽  
V.G. Suvorov ◽  
A.E. Shelekhova ◽  
◽  
...  

Abstract: A comparative retrospective analysis of the results of a clinical - X-ray examination of 93 women doctors of ultrasound examinations of working age and 60 people was performed. control groups of age and experience comparable work with persons of major groups (nurses not associated with exposure to occupational ultrasound). Degenerative-dystrophic changes were revealed in the form of: osteorthrosis of the shoulder, elbow, wrist and interphalangeal joints, periarthrosis of the shoulder and elbow joints, small cyst-like clearances and enostoses in the bones of the wrists of the most loaded upper limb. The level of decrease in the mineral saturation and thickness of bone trabeculae in the areas of interest of the radius bones and distal phalanges of the hands was dependent on the severity of the clinical picture of vegetative-sensory polyneuropathy. Indicators of bone density and the state of bone trabeculae in the spongy structures of the distal radial bones and distal phalanges can be a kind of marker of the severity of OP. The use of modern methods for assessing the density and structure of bone tissue allows us to reduce the negative role of the so-called "human factor" and thus

Author(s):  
Valentin N. Druzhinin ◽  
Vadim G. Suvorov ◽  
Aleksandr N. Cherniy ◽  
Sergey N. Troinyakov

Introduction. Varicose disease of the lower limbs (VDLL) is an independent disease and is an important medical and social problem due to its widespread and tendency to progress among people of working age and mainly in the female half of the population. Features of professional activity are risks in the form of static loads of a constant nature or weightlifting and other risk factors (for example, genetic predisposition, hormonal imbalance during pregnancy and menopause, obesity, diabetes mellitus, hypercoagulation, treatment with hormonal drugs, irrational nutrition, alcohol abuse, the presence of osteopenia and osteoporosis (OP). A feature of the disease is the presence of concomitant (often combined) pathology of the musculoskeletal system, which is characterized, as a rule, by early manifestation, relatively rapid progression, and complicated course. Radiologically, relatively often revealed pathology of the feet (flat feet, hallux valgus and deformity of the 1st finger) and degenerative-dystopian changes in the spine (osteochondrosis, spondyloarthritis, spondylosis, scoliosis, kyphosis). The most pronounced combined pathology of the musculoskeletal system is observed in patients with active trophic disorders. Considering the comorbidity of the disease, changes in regional hemodynamics and microcirculation in the lower limbs undoubtedly affect the indicators of hemostasis, carbohydrate, lipid and mineral metabolism. Therefore, a significant interest to improve the diagnosis of OP are often present in the form of a clinical syndrome, which is characterized by decrease in bone density, a violation of their micro-and increased fragility, due to the metabolic disorders of bone tissue with a predominance of catabolism over the processes of bone formation and increased risk of fractures. The state of bone mineral saturation, in particular in the female half of the population, depending on the severity of venous insufficiency remains insufficiently studied. Treatment of VDLL and its concomitant OP syndrome is not always a solvable problem, so the optimization of the diagnosis of this disease, especially at the initial stages, as well as in the process of dynamic monitoring and control of the effectiveness of therapeutic and preventive measures remains relevant. The aim of the study was to study the diagnostic possibilities of using radiometry (radiocomparametry and digital osteodensitometry) for precision assessment of mineral saturation of the spongy structure of the calcaneus in patients at risk for the appearance and development of VDLL. Materials and methods. As part of the general clinical examination, special comparative X-ray studies of the state of mineral saturation and dimensional characteristics of bone trabeculae of the spongy structure of the calcaneus were performed in 129 women with clinical signs of VDLL, which in accordance with the international classification of CEAP were divided into stages: C1 - 36 people, C2 - 32 people, C3 - 39 people, C4 - 30 people, C5 - 22 people. The comparison group included 119 practically healthy women, comparable to the main group by age, work experience and morbid history. The X-ray diagnostic complex included, in addition to convective (routine) radiography of various parts of the osteoarticular apparatus, performed only according to indications, the following methods: interactive radiography (digital low-dose radiography) of the foot with a calibrated wedge-a standard of density, a posteriori testometric X-ray parametry of bone trabeculae of spongy structures of the calcaneus. Modern equipment was used: digital X-ray diagnostic complexes DR-GEBrivo), AXIOMLuminas (Siemens), dichromatic osteodensitometer "PRODIGY" (Lunar). Results. As part of the general clinical examination, X-ray examinations were performed before the implementation of therapeutic measures and after 24 months. Radiometric indicators of mineral saturation and thickness of trabeculae of the spongy structure of the calcaneus showed a direct dependence on age, reaching maximum values in the age category of 25-30 years with a clear tendency to decrease in older age groups. The mineralization parameters relative to the control were initially reduced, revealing variability depending on the severity of the main pathological process (from relatively high at C1 to relatively low at C5). There was also a pattern of increasing levels of mineralization and thickness of bone trabeculae depending on the period of observation (in fact, on the volume of complex therapeutic and preventive measures) in almost all patients, but mainly in groups C4, C5. Subjective symptoms and objective clinical picture of the condition of the examined patients with the presence of VDLL and OP syndrome correlated with the data of osteorentgenometry. Conclusions. The examined women, whose production activity makes them belong to the risk group for the appearance and development of VDLL, have a opioid structure of the calcaneus. The use in complex clinical and radiological diagnostics of the methodical technique of precision assessment of mineral saturation in (mg/mm2) and thickness of bone trabeculae (mm) makes it possible to objectify the reconstruction of the bone structure at the submacroscopic level of its visualization. Quantitative densitometric indicators of changes in the spongy structure of the calcaneus can be considered as markers of the severity of the condition and the direction of the course of VDLL with concomitant OP. Postprocessing radiometry the calcaneus performed on digital radiographs and the screens of computers using programs "LINS MAKHAON workstation of the DOCTOR" available, not associated with additional radiation exposure and, therefore, can be widely applied both at the stage of primary diagnosis of the health status of the studied patients and in monitoring the effectiveness of remedial measures.


1966 ◽  
Vol 15 (03/04) ◽  
pp. 519-538 ◽  
Author(s):  
J Levin ◽  
E Beck

SummaryThe role of intravascular coagulation in the production of the generalized Shwartzman phenomenon has been evaluated. The administration of endotoxin to animals prepared with Thorotrast results in activation of the coagulation mechanism with the resultant deposition of fibrinoid material in the renal glomeruli. Anticoagulation prevents alterations in the state of the coagulation system and inhibits development of the renal lesions. Platelets are not primarily involved. Platelet antiserum produces similar lesions in animals prepared with Thorotrast, but appears to do so in a manner which does not significantly involve intravascular coagulation.The production of adrenal cortical hemorrhage, comparable to that seen in the Waterhouse-Friderichsen syndrome, following the administration of endotoxin to animals that had previously received ACTH does not require intravascular coagulation and may not be a manifestation of the generalized Shwartzman phenomenon.


2003 ◽  
pp. 66-76
Author(s):  
I. Dezhina ◽  
I. Leonov

The article is devoted to the analysis of the changes in economic and legal context for commercial application of intellectual property created under federal budgetary financing. Special attention is given to the role of the state and to comparison of key elements of mechanisms for commercial application of intellectual property that are currently under implementation in Russia and in the West. A number of practical suggestions are presented aimed at improving government stimuli to commercialization of intellectual property created at budgetary expense.


2006 ◽  
pp. 87-96
Author(s):  
Yu. Shvetsov

The article considers the problem of bureaucratisation of the state and the most important social and economic consequences of this phenomenon. The essence of bureaucracy has been revealed, characteristic features of its functioning in Russia have been analyzed; the material base of bureaucracy and its dominating status in the society have been substantiated. The conclusion has been made that the process of changing the role of the budget to serve the interests of bureaucracy is being accomplished.


Author(s):  
Ruth Kinna

This book is designed to remove Peter Kropotkin from the framework of classical anarchism. By focusing attention on his theory of mutual aid, it argues that the classical framing distorts Kropotkin's political theory by associating it with a narrowly positivistic conception of science, a naively optimistic idea of human nature and a millenarian idea of revolution. Kropotkin's abiding concern with Russian revolutionary politics is the lens for this analysis. The argument is that his engagement with nihilism shaped his conception of science and that his expeditions in Siberia underpinned an approach to social analysis that was rooted in geography. Looking at Kropotkin's relationship with Elisée Reclus and Erico Malatesta and examining his critical appreciation of P-J. Proudhon, Michael Bakunin and Max Stirner, the study shows how he understood anarchist traditions and reveals the special character of his anarchist communism. His idea of the state as a colonising process and his contention that exploitation and oppression operate in global contexts is a key feature of this. Kropotkin's views about the role of theory in revolutionary practice show how he developed this critique of the state and capitalism to advance an idea of political change that combined the building of non-state alternatives through direct action and wilful disobedience. Against critics who argue that Kropotkin betrayed these principles in 1914, the book suggests that this controversial decision was consistent with his anarchism and that it reflected his judgment about the prospects of anarchistic revolution in Russia.


1970 ◽  
Vol 65 (3_Suppl) ◽  
pp. S5-S32 ◽  
Author(s):  
K. Loewit

ABSTRACT The role of luteinizing hormone (LH) for the maintenance of pregnancy, parturition and lactation was investigated by immunological and histochemical methods in the rat. Neutralisation of endogenous rat-LH with Rabbit-Anti-Bovine-LH-Serum (selective hypophysectomy) from days 7-12 of pregnancy resulted in reabsorption of the foetuses and the reappearance of strong 20α-hydroxysteroid-dehydrogenase (20α-OHSD) activity in the corpora lutea (CL) of pregnancy, which normally show no such activity at that time. This effect could be prevented in part by concurrent pregnenolone administration and fully by progesterone, but was not influenced by oestrogen or prolactin. It is concluded that in early pregnancy LH is the main luteotrophic hormone in the rat even though prolactin might act synergistically with it. Antiserum treatment after the 12th day of gestation had no influence on the state or duration of pregnancy or on parturition. LH-injections during the first half of pregnancy had no luteolytic effects i. e. they did not activate 20α-OHSD activity. After day 16 they advanced the reappearance of the enzyme, but delayed parturition or resulted in stillbirths. Neither LH nor antiserum seemed to alter lactation. Since progesterone prevented both the termination of pregnancy and the recurrence of 20α-OHSD activity, it should have some regulatory properties on the enzyme. It is discussed whether the gonadotrophin-dependent progesterone level could regulate the 20α-OHSD activity rather than result from it.


2012 ◽  
Vol 3 (8) ◽  
pp. 55-58
Author(s):  
K.K. Somashekara K.K. Somashekara ◽  
◽  
B.N. Shivalingappa B.N. Shivalingappa

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