scholarly journals Low Interface Pressure Provides Major Part of Hemodynamic Response to Compression Therapy

2019 ◽  
Vol 57 (5) ◽  
pp. 708 ◽  
Author(s):  
Fedor Lurie
Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 2881 ◽  
Author(s):  
Shumi Zhao ◽  
Rong Liu ◽  
Chengwei Fei ◽  
Dong Guan

Intermittent pneumatic compression (IPC) is a proactive compression therapeutic technique in the prophylaxis of deep vein thrombosis, reduction of limb edema, and treatment of chronic venous ulcers. To appropriately detect and analyze biomechanical pressure profiles delivered by IPC in treatment, a dynamic interface pressure monitoring system was developed to visualize and quantify morphological pressure mapping in the spatial and temporal domains in real time. The system comprises matrix soft sensors, a smart IPC device, a monitoring and analysis software, and a display unit. The developed soft sensor fabricated by an advanced screen printing technology was used to detect intermitted pressure by an IPC device. The pneumatic pressure signals inside the bladders of the IPC were also transiently collected by a data acquisition system and then transmitted to the computer through Bluetooth. The experimental results reveal that the developed pressure monitoring system can perform the real-time detection of dynamic pressures by IPC and display the morphological pressure mapping multi-dimensionally. This new system provides a novel modality to assist in the effective evaluation of proactive compression therapy in practice. The study results contribute to understanding the working mechanisms of IPC and improving its functional design based on intuitive biomechanical characteristics of compression delivery profiles.


Phlebologie ◽  
2011 ◽  
Vol 40 (06) ◽  
pp. 344-355 ◽  
Author(s):  
H.A.M. Neumann

SummarySkin, veins and legs are the three ingredients which compose together the symptom complex know as chronic venous insufficiency (CVI). High ambulatory venous pressure is transferred by simple physical laws to the skin microcirculation. The capillaries are not resistant to this high pressure and will leak water, erythrocytes and plasma proteins into the in-terstitium. The result is oedema, pigmentation, sclerosis, inflammation and ulceration. Although many forms of intervention for incompetent veins are available, compression therapy is still the cornerstone in the treatment of CVI. Beside the interface pressure, the stiffness of the compression material is essential. By increasing the stiffness the difference in pressure during walking increases and with this the massage effect of the therapy.Thermo-ablation is the treatment for varicose veins today. Knowledge about the development and transfer of the intravascular heat is essential to understand this treatment. New experiments, specially about steam development from the heat source in the blood are of great importance for the success rate. Fine tuning in those physical parameters is needed to optimally this treatment.


2019 ◽  
Vol 35 (4) ◽  
pp. 262-267 ◽  
Author(s):  
Junjie Ning ◽  
John Fish ◽  
Felix Trinh ◽  
Jihad Abbas ◽  
Andrew Seiwert ◽  
...  

Background Measuring the interface pressure produced by compression therapy devices is essential for research and clinical practice. New user-friendly measuring devices, such as Smart Sleeve Pressure Monitor (SSPM) and Juzo Pressure Monitor (JPM) allow longitudinal pressure measurement. However, their accuracy and agreement with well-established usage of the PicoPress (PP) are unknown. The aim of this study is to investigate measurement accuracy of PP, SSPM, and JPM. Methods The three devices were tested in 10 healthy volunteers by applying incrementally increasing pressure from 20 mm Hg to 50 mm Hg using a calibrated sphygmomanometer cuff. The linearity of the response and measurement accuracy were compared among the three devices. In a separate experiment, the three devices were compared by simultaneously recording the interface pressure under bandages immediately after bandaging and after 4 h of wearing the bandage. Results PP had the best performance with the reference of sphygmomanometer, while JPM had better linearity and accuracy than SSPM. The mean difference in the interface pressure under bandages was +13.36 mm Hg between SSPM and PP, and +0.50 mm Hg between JPM and PP. The 95% limits of agreement were −13.92 and +40.64 mm Hg, and −19.83 and +20.84 mm Hg, respectively. Conclusions JPM showed better agreement with both sphygmomanometer and PP compared to SSPM. JPM is a reasonable alternative for monitoring interface pressure continuously.


2014 ◽  
Vol 29 (1_suppl) ◽  
pp. 140-145 ◽  
Author(s):  
Hugo Partsch

Compression therapy is the most important basic treatment modality in venous leg ulcers. The review focusses on the materials which are used: 1. Compression bandages, 2. Compression stockings, 3. Self-adjustable Velcro-devices, 4. Compression pumps, 5. Hybrid devices. Compression bandages, usually applied by trained staff, provide a wide spectrum of materials with different elastic properties. To make bandaging easier, safer and more effective, most modern bandages combine different material components. Self-management of venous ulcers has become feasible by introducing double compression stockings (“ulcer kits”) and self-adjustable Velcro devices. Compression pumps can be used as adjunctive measures, especially for patients with restricted mobility. The combination of sustained and intermittent compression (“hybrid device”) is a promising new tool. The interface pressure corresponding to the dosage of compression therapy determines the hemodynamic efficacy of each device. In order to reduce ambulatory venous hypertension compression pressures of more than 50 mm Hg in the upright position are desirable. At the same time pressure should be lower in the resting position in order to be tolerated. This prerequisite may be fulfilled by using inelastic, short stretch material including multicomponent bandages and cohesive surfaces, all characterized by high stiffness. Such materials do not give way when calf muscles contract during walking which leads to high peaks of interface pressure (“massaging effect”).


2000 ◽  
Vol 26 (5) ◽  
pp. 481-488 ◽  
Author(s):  
Jürg Hafner ◽  
Walter Lüthi ◽  
Holger Hänssle ◽  
Gerhard Kammerlander ◽  
Günter Burg

2019 ◽  
Vol 89 (21-22) ◽  
pp. 4410-4424
Author(s):  
Ferdinand Tamoue ◽  
Andrea Ehrmann ◽  
Tomasz Blachowicz

The pressure developed beneath any compression system is governed by the tension in the compression fabric. Depending on the type of material – cotton or elastomer – compression systems may react differently under the same stress. The previous work of our group and experience related to compression systems showed that classification of bandage materials is required for manufacturers who want to create products with specific compression levels. One of the mathematical descriptions of the expected pressure due to a tensile force in the fabric is the modified Young–Laplace equation. However, the pressure achieved by real compression systems hardly matches with the estimated values. Two groups of elastic bandages – short stretch and long stretch – were selected and investigated within this work. The tensile forces were measured using a dynamometer, and the pressures deduced at a given maximal load (3 N/cm) were compared with the pressures measured beneath the bandage on living subjects. The results show that the interface pressure can be predicted from the tensile force at the inflexion point of the hysteresis curves. Calculated pressures were in a therapeutic range but were significantly different from practically applied pressures, indicating large differences between calculated and real pressures on the leg.


2021 ◽  
Vol 34 (2) ◽  
pp. 57-73
Author(s):  
Marina Mayer-Yousif ◽  
Wolfgang Konschake ◽  
Hermann Haase ◽  
Michael Jünger ◽  
Helene Riebe

Background and Objective: Although compression therapy is a very effective therapy in reducing stasis-induced complaints, the wearing comfort is not always as requested. Most frequent problems are dryness of the skin and itching. This randomized, cross-over trial investigated 33 healthy participants and compared 2 different medical compression stockings: conventional stockings (type A = MCS) versus compression stockings with integrated care emulsion (type B = MCS-SkC). Methods: Participants were divided into 2 cohorts. Both compression types were worn one after the other, 1 week each. The cohorts were named according to the sequence of the wearing periods (cohort AB/BA). Primary outcome: skin hydration. Secondary outcomes: transepidermal water loss (TEWL), skin roughness, leg volume, interface pressure, and questionnaires about stasis-induced complaints and wearing comfort. Results: Skin hydration: significant reduction after wearing MCS in both cohorts (p < 0.001); preservation of skin moisture after wearing MCS-SkC (p = 0.546 and p = 0.1631). TEWL: significant increase after wearing MCS (p = 0.007 and p = 0.0031); significant reduction by wearing MCS-SkC (p = 0.006 and p = 0.0005). Skin roughness: significant increase after wearing MCS (p = 0.0015 and p = 0.010), and nonsignificant decrease of skin roughness after wearing MCS-SkC (p = 0.933 and p = 0.4570). Leg volume: significantly reduced with both stockings (p = 0.004 and p = 0.0047). Regarding stasis-induced complaints, both stockings achieved good results. Conclusions: Both compression stockings are appropriate to reduce leg edema and minimize leg symptoms. MCS-SkC helps to obtain the natural skin barrier function in preserving the epidermal water content and reducing the TEWL.


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