Segmented Compression Zones in Functional Sock for Venous Return
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Solution Overview
Problem
Traditional compression socks provide constant circular compression, which can be harmful to healthy veins by over-compressing superficial veins, restricting blood flow and reducing the efficiency of the venous pump in the calf, and do not effectively address venous return in healthy individuals.
Innovation Solution
A functional sock with targeted, staged compression zones that apply periodic longitudinal compression, using a system of interconnected compression zones made of more-compressive material, extending from the foot to the calf, to actively and passively facilitate venous blood return by applying force at specific angles, improving venous return without damaging veins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional compression socks apply constant circular compression, then venous pressure is reduced, but superficial veins are over-compressed and blood flow is restricted
Solution Approach 1:
The sock is divided into multiple compression zones with different compression levels. The first compression zone at the foot provides highest compression, the second zone at the ankle provides medium compression, and the third zone at the calf provides lowest compression. This segmented approach ensures that compression is applied only where needed to support venous return without over-compressing healthy superficial veins in other areas.
Solution Approach 2:
Different portions of the sock have different compression characteristics tailored to specific anatomical regions. The compression zones are positioned to match the venous pressure gradient in the lower extremity, with stronger compression distally and weaker compression proximally. This local differentiation allows effective venous support while avoiding harmful over-compression in healthy vein areas.
2Speed
If compression stockings use stronger elastics to create significant pressure, then venous blood flow velocity increases, but the venous pump efficiency in the calf is reduced
Solution Approach 1:
The compression zones are designed to be dynamically active during movement. The elastic materials and structural design allow the compression zones to expand and contract with calf muscle movement, maintaining optimal compression levels that support venous return without impeding the natural venous pump mechanism. The compression adapts to physiological changes during activity.
3Stress or pressure
If constant circular compression is applied, then venous pressure is decreased, but blood flow is restricted and venous function is impaired
Solution Approach 1:
The compression zones are designed to work in periodic coordination with the natural gait cycle and venous pump action. During calf muscle contraction, the compression zones allow for increased blood flow; during relaxation, they provide supportive compression. This periodic action pattern maintains healthy venous function while promoting efficient venous return.
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 sock effectively enhances venous return by actively pushing blood upward in a staged manner, improving blood outflow from the calf without over-compressing veins, thus maintaining healthy venous function and preventing complications associated with traditional compression socks.
Implementation Method 1
The compression zones include a first compression zone (20) beginning at a cuff region (12) of the sock (10) and extending inferiorly toward a heel of the sock (10); a second compression zone (22) beginning at the cuff region (12) and extending inferiorly toward an ankle of the sock (10); a third compression zone (24) beginning at the cuff region (12) and extending inferiorly toward the ankle of the sock (10); and a fourth compression zone (26) beginning laterally at the cuff region (12) and extending inferiorly toward the ankle of the sock (10).
Implementation Method 2
The sock (10) includes a plurality of targeted compression zones (20, 22, 24, 26). Each of the compression zones includes a superior (or proximal) portion extending in at least somewhat of a generally superior-inferior (or proximal-distal) direction and an inferior (or distal) portion contiguous with the superior portion and comprising a portion extending in a direction generally orthogonal to the generally superior-inferior direction of the superior portion.
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3A~3B
AI summary
Clothing and methods for providing targeted and staged compression to portions of a lower extremity, such as a leg of a human may include individual pieces of clothing such as socks and the like, or multiple-piece clothing systems functioning together to provide targeted and staged compression to the lower extremity. One or more articles of clothing individually or together have a plurality of targeted compression zones. Each of the compression zones includes a superior portion extending in a generally superior-inferior direction and an inferior portion contiguous with the superior portion and comprising a portion extending in a direction generally crosswise to the generally superior-inferior direction of the superior portion. Other implementations are also described.