elastic compression
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2021 ◽  
Vol 9 (4) ◽  
pp. 01-05
Author(s):  
Jochanan E. Naschitz

Chronic stasis dermatitis, usually confined to the lower legs, is a complication of longstanding interstitial edema and inflammation, due either to venous hypertension or disorders having in common excessive lymph overload. Heart failure, renal failure, liver cirrhosis, secondary and primary diseases of lymph vessels may complicate with stasis dermatitis. The same mechanisms causing stasis dermatitis can also generate skin ulcers superimposed on stasis dermatitis. In the appropriate context such skin ulcers are called "venous ulcers" or, in different situations, “stasis ulcers”. The distinction between venous and other stasis ulcers is usually possible at the bedside. Also, some general measures of therapy are similar for venous and other stasis ulcers: such are elastic compression, topical skin care and ulcer care. In having in common the pathophysiological mechanisms, in bearing clinical resemblance, and responding to similar therapies, a unifying concept may be opportune to comprise the spectrum of stasis dermatitis, venous and other stasis ulcers. The present work is an appeal to this aim.


Compression is the best therapy in the treatment of venous ulcers. The intensity of the bandage compression essentially depends on four factors: the physical structure and elastomeric properties of the bandage, the shape of the limb the bandage is applied to, the ability and experience of the doctor or nurse who applies it and the ability of the patient to deambulate [1, 2]. The development of construction technologies can help reduce the variability of inter- and intra-bandage tension: one of the most promising possibilities is the manufacturing of a vari-stretch elastomer, capable of exerting a relatively constant pressure regardless of limited variations in extension.


Author(s):  
Виктор Сергеевич Суров

Описан многомерный узловой метод характеристик, предназначенный для численного расчета упругопластической деформации твердого тела в рамках модели Прандтля-Рейса с уравнением состояния небаротропного типа. В качестве критерия перехода из упругого в пластическое состояние применялось условие текучести Мизеса. Рассмотренный численный метод базируется на координатном расщеплении исходной системы уравнений на ряд одномерных подсистем с последующим их интегрированием с помощью одномерного узлового метода характеристик. Метод использован для расчета ряда одно- и двумерных модельных задач A multidimensional nodal method of characteristics is described. The method is designed to numerically calculate the elastoplastic deformation of a solid body within the Prandtl-Reis model with the non-barotropic state equation. The Mises flow condition was used as a criterion for the transition from an elastic to a plastic state. The considered numerical method is based on the coordinate splitting of the original system of equations into a number of one-dimensional subsystems. Then the resulting equations were integrated using a one-dimensional nodal method of characteristics. The proposed method allows calculating a number of one- and two-dimensional model problems. The results of calculations that employ the multidimensional node method of characteristics were compared with data calculated using the Godunov hybrid method in the framework of a model that did not take into account the contribution of potential elastic compression energy to the total energy of the medium. There are some discrepancies in the calculation results that occur at high speeds of interaction of the aluminum striker with the barrier, exceeding 500 m/s, which are associated with omission of the potential energy due to the elastic compression of the solid within the original Prandtl-Reis model


BMJ Open ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. e048331
Author(s):  
Rachel Hellen Petra Schreurs ◽  
Manuela A Joore ◽  
Hugo ten Cate ◽  
Arina J ten Cate-Hoek

ObjectivesElastic compression stocking (ECS) therapy is an important treatment for patients with deep venous thrombosis (DVT) and chronic venous insufficiency (CVI). This study aimed to provide insight into the structure and variability of the ECS therapy process, its effects on outcomes, and to elicit improvement themes from a multiple stakeholder perspective.DesignThirty semi-structured interviews with professionals and patients were performed. The essential functions for the process of ECS therapy were extracted to create two work-as-done models using the Functional Resonance Analysis Method (FRAM). These findings were used to guide discussion between stakeholders to identify improvement themes.SettingTwo regions in the Netherlands, region Limburg and region North-Holland, including an academic hospital and a general hospital and their catchment region.ParticipantsThe interviewees were purposely recruited and included 25 healthcare professionals (ie, general practitioners, internists, dermatologists, nurses, doctor’s assistants, occupational therapists, home care nurses and medical stocking suppliers) and 5 patients with DVT or CVI.ResultsTwo FRAM models were created (one for each region). The variability of the functions and their effect on outcomes, as well as interdependencies between functions, were identified. These were presented in stakeholder meetings to identify the structure of the process and designated variable and uniform parts of the process and its outcomes. Ultimately, six improvement themes were identified: dissemination of knowledge of the entire process; optimising and standardising initial compression therapy; optimising timing to contact the medical stocking supplier (when oedema has disappeared); improving the implementation of assistive devices; harmonising follow-up duration for patients with CVI; personalising follow-up and treatment duration in patients with DVT.ConclusionsThis study provided a detailed understanding of how ECS therapy is delivered in daily practice by describing major functions and variability in performances and elicited six improvement themes from a multistakeholder perspective.


Haematologica ◽  
2021 ◽  
Author(s):  
Paolo Prandoni ◽  
Anthonie WA Lensing ◽  
Martin H Prins ◽  
Sabina Villalta ◽  
Raffaele Pesavento ◽  
...  

Not available.


2021 ◽  
Vol 29 (2) ◽  
pp. 245-250
Author(s):  
Roman E. Kalinin ◽  
Igor A. Suchkov ◽  
Denis A. Maksaev

AIM: This study aimed to investigate the effectiveness of the application of a combination of the preparation of micronized purified flavonoid fraction (MPFF) and elastic compression in patients with acquired lymphostasis. MATERIALS AND METHODS: Sixty patients with stage II secondary lower limb lymphedema according to М. Foeldi were included. The patients were divided into two groups through randomization with the envelope method. The first group (n = 30) was subjected to a conservative treatment (MPFF, 1000 mg/day) coupled with elastic compression (3rd class compression stockings). The second group was given compressive therapy (third-class compression stockings). The patients were physically examined through the measurement of the circumference of the limb at different levels. RESULTS: In the first group, the circumference of the lower third of the shin decreased by 8.15% (p = 0.005) after 1 month and by the end of treatment by 10.6% (p 0.001), of the middle third of shin by 3.15% (p = 0.001) and 4.78% (p 0.001), and of the upper thirdby 4.08% (p 0.001) and 5.99% (p 0.001). By the end of the observation period (3 months), the circumference of the lower third of the shin in the second group (29.68 4.67 cm) was significantly greater than that in the first group (26.65 2.92 cm, p = 0.035). No adverse reactions were observed in the MPFF group. CONCLUSIONS: The volume of the lower limbs of patients with acquired lymphedema decreased after using a combination of MPFF and elastic compression to a larger extent than after the isolated use of elastic compression. Patients taking MPFF had a positive clinical effect without adverse reactions. Therefore, MPFF could be used in the pharmacotherapy of secondary lymphedema of the lower limbs.


2021 ◽  
Vol 102 (3) ◽  
pp. 277-283
Author(s):  
Roman E. Kalinin ◽  
Igor A. Suchkov ◽  
Denis A. Maksaev ◽  
Yulia V. Abalenikhina

Aim. To assess the antioxidant status in patients with secondary lymphedema of the lower extremities who undergo different types of conservative treatment. Methods. The study included 90 patients with secondary lymphedema of the lower extremities and 30 healthy volunteers. Group 1 participants (n=30) received compression therapy and Vitamin E at a dose of 400 IU/day, group 2 participants (n=30) compression therapy and a micronized purified flavonoid fraction 1000 mg/day, group 3 (n=30) compression therapy alone. Group 4 (n=30) comprised healthy volunteers. The level of malondialdehyde, the activity of superoxide dismutase, glutathione peroxidase, catalase, and the level of non-protein thiols (SH-groups) were determined at inclusion in the study and then after 1 and 3 months. Results. In patients with secondary lymphedema, the initial level of glutathione peroxidase was higher by 768.22%, catalase by 420.5%, malondialdehyde by 60%, and the level of SH-groups was lower by 65,71% compared with the group of volunteers. In the first group, there was a significant decrease of 36.1% in the level of superoxide dismutase and a significant increase of 89.9% in the level of glutathione peroxidase at the end of therapy when compared with the level after 1 month. In the second group, catalase level significantly increased by 33.3%, superoxide dismutase by 17.6%, and glutathione peroxidase by 61.3% compared to baseline values. The biochemical indicators of the endothelium significantly increased when using a combination of micronized purified flavonoid fraction and elastic compression in comparison with elastic compression alone and a combination with Vitamin E. In the third group, there were no significant differences in the levels of biochemical indicators of endothelial function. Conclusion. Increased formation of lipid peroxidation products along with a decrease in the activity of antioxidant systems was revealed in patients with lower extremity secondary lymphedema compared with healthy volunteers; the most effective therapy aimed at correcting endothelial cell dysfunction is the use of micronized purified flavonoid fraction and elastic compression.


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