Compression Stocking Double-Helix Weft Yarn Donning
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Solution Overview
Problem
High compression medical stockings are difficult to don and remove, especially for elderly or pregnant individuals with limited dexterity, leading to non-compliance with treatment due to the natural morphology of limbs and the complexity of donning processes.
Innovation Solution
A medical compression stocking design featuring a weft thread with an elastomer and elastane core titration between 750 and 1700 dTex, wrapped in a double helix, allowing for larger dimensions and easier donning by reducing deformation and elongation, facilitating the application of high compression levels without external assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high compression level is provided to achieve therapeutic effect, then therapeutic effectiveness is improved, but difficulty in donning increases
Solution Approach 1:
The patent changes the physical parameters of the stocking by increasing the denier (thickness) of the elastic core from conventional values to 750-1700 dTex. This parameter change allows the stocking to achieve high compression levels (therapeutic effectiveness) while the increased thickness provides greater elasticity and stretch, reducing the force needed for donning.
Solution Approach 2:
The patent uses a composite structure with a central elastic core (elastomer/elastane) wrapped in a double helix of covering threads. This composite material design allows the stocking to combine high compression capability with enhanced elasticity and ease of donning, as the thick elastic core provides both the therapeutic compression and the stretch needed for easy application.
2Reliability
If high compression level is provided to achieve therapeutic effect, then therapeutic effectiveness is improved, but patient compliance decreases
Solution Approach 1:
By changing the denier parameter to 750-1700 dTex, the stocking achieves a balance where high compression is maintained for therapeutic effect, but the increased elasticity from the thicker core makes donning easier, thereby improving patient compliance and reducing treatment abandonment.
Solution Approach 2:
The stocking is designed to be easily donned by the patient themselves without requiring external assistance or complex donning procedures. The enhanced elasticity from the thick elastic core enables patients with limited dexterity to independently apply the high-compression stocking, improving self-service capability and compliance.
3Ease of manufacture
If conventional elastic core titration is used, then ease of manufacture is improved, but difficulty in donning increases
Solution Approach 1:
The patent increases the elastic core titration to 750-1700 dTex, which maintains compatibility with conventional manufacturing processes while significantly improving ease of donning. The thicker core can be produced using standard knitting and wrapping techniques, ensuring ease of manufacture is preserved.
Solution Approach 2:
The composite structure with covering threads wrapped in a double helix around the thick elastic core can be manufactured using conventional techniques. The double helix wrapping method is a standard process that accommodates the thicker core while maintaining ease of manufacture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables easy donning and increased patient compliance by providing a high compression level textile article with reduced deformation and elongation, making it easier to put on and take off, especially for individuals with mobility issues, while maintaining therapeutic effectiveness.
Implementation Method 1
a central core made of elastomer and in particular elastane, knitted on the whole of the manufactured article
Data Source
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Figure 4
AI summary
The invention relates to a knitted-type compression item with a therapeutic and/or physiological effect, designed for facilitating the pulling-on thereof, with a high level of compression of more than 20mmHg, comprising a double-helix plated weft yarn with an elastomer core, especially elastane, over the entirety of the item produced. Said compression item is characterised in that the weft yarn count is between 750 and 1700 dTex, enabling, for the same classification, the production of an item having larger dimensions than a comparable item of the same category. The compression item is also characterised in that the dimensional elongation characteristics of the item its entire surface correspond to formula (I) where factor K is equal to 55 and expressed as formula (II), and in that the deformation of the item has an elongation coefficient in position and for the minimum application dimensions, of less than 25%.