New approach for the prediction of compression pressure using the cut strip method

Abstract

The main objective of the current research is the development of a new mathematical model for the prediction of compression pressure based on the incorporation of some new parameters. These new parameters include deformed width (wf), true stress ([Formula: see text]), true/logarithm strain ([Formula: see text]), true modulus of elasticity ([Formula: see text]), along with measurement of engineering stress ([Formula: see text]), engineering strain ([Formula: see text]) and engineering modulus of elasticity ([Formula: see text]) at ankle position. Various brands of compression socks comprising similar fibrous combinations, as well as knit type, were purchased. Initially they were hand washed, put on the leg for marking, marked in a square, sliced, and cut into rectangular strips. The rectangular cut strips were evaluated for force–elongation characterization at different strain values considering the requisite practical elongation values (circumferential difference between leg and sock at ankle portion). For pressure measurement, a Salzmann MST MK IV pressure measuring device using a standard-sized wooden leg (circumference = 240 mm) was used. For tensile evaluation, a Testometric tensile tester was used. In this research we developed the two mathematical models based on true Young’s modulus and engineering Young’s modulus were compared with Hooke’s law and Laplace’s law. The developed models were also compared with previously existing models statistically.

Medical textiles

“…Very recently, a new practical engineering approach to modelling, measuring and predicting the compression from a compression garment used a cut-strip method to develop two new mathematical models based on 'true Young's modulus' and 'engineering Young's modulus'. Through comparison with Hooke's law and Laplace's law and previous models of Leung et al [458] and Dubuis et al [459], using linear regression to assess the experimentally-measured compression pressure results, it was found that the newly-developed models were more precise and accurate than the previous models [460].…”

The Structure and Compression of Medical Compression Stockings

“…Different elongations and compressions are achieved at certain cylinder diameters. In order to imitate the stocking position on the leg, it is mounted on an artificial leg, which is most commonly wooden, and the compression is measured in different places [ 16 , 25 , 26 ]. When measuring the stocking compression on a person, i.e., on a real leg, measurements are performed in a similar way.…”

“…The results obtained on a model and the human leg will be different [ 10 , 11 , 16 ]. The results of measuring stocking compression at different bidirectional elongations or those obtained through different measuring methods will also differ [ 26 , 27 , 28 ]. In any case, the relevant compression values are those measured on the human leg, and any other results should be compared or adjusted to those.…”