Correlation Between the Static and Dynamic Stiffness Indices of Medical Elastic Compression Stockings

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Abstract:

BACKGROUND

Compression therapy with medical elastic compression stockings (MECS) has been used effectively for treating patients with chronic venous insufficiency for many years. OBJECTIVE

To study the correlation between static stiffness and the dynamic stiffness index of 18 different brands of MECS. METHODS

In all, 18 different brands of MECS were divided into 5 categories (class II round-knit, class II flat-knit, class III round-knit, class III flat-knit, and class IV flat-knit) and tested. The tension of the textile of the MECS at the B1 level was measured according to the Institut de Textile France method to calculate the static stiffness index. The dynamic pressure pulsations were measured with a newly developed dynamic pressure-determining device to calculate the dynamic stiffness index. RESULTS

The results showed that there was a positive correlation between the static stiffness index and the dynamic stiffness index. The dynamic stiffness indices were higher than the static stiffness indices. CONCLUSION

Although the stiffness of MECS is a further refinement to the current classification, which classifies MECS according to the pressure they exert at the B level, the dynamic stiffness index does not have any additional value over the static stiffness index as far as the classification of MECS is concerned. Either or both of these characteristics should be used to select the most suitable MECS for the patient.

The Artificial Leg Segment Model was on loan from R. Stolk, Research and Development Department of Varitex, NV. MECS were provided without charge by the various manufacturers.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1524-4725.2008.34312.x

Affiliations: 1: Department of Dermatology and Venereology, Elkerliek, Helmond, The Netherlands; 2: Department of Dermatology and Venereology, Erasmus MC, University Medical Center, Rotterdam, The Netherlands

Publication date: November 1, 2008

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