Dual-Structure Medical Cast with Ventilated Channels
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Solution Overview
Problem
Current medical casts suffer from poor air permeability, leading to discomfort, secondary infections, and damage due to inadequate moisture discharge and uneven pressure distribution, which complicates the casting process and prolongs treatment efficiency.
Innovation Solution
A dual-structured medical cast with a skin protector and inner and outer supporting casts, featuring ventilating channels, diamond-shaped mesh holes, and rigidity reinforcing elements, made from functional fibers like polyester yarn and polyolefin, to enhance air permeability, adhesive strength, and prevent bending at joints, while allowing for easy moisture discharge and improved X-ray permeability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cotton bandage is wound on the skin prevention cloth in a spiral shape with predetermined thickness repeatedly several times, then the cast structure is formed and hardens, but air permeability deteriorates and sweat cannot be smoothly discharged
Solution Approach 1:
The patent introduces a porous film layer between the skin prevention cloth and cotton bandage. This porous film maintains the structural integrity and hardening capability of the cast while providing channels for air circulation and sweat discharge, thus resolving the contradiction between cast strength and air permeability.
Solution Approach 2:
The cast is divided into multiple functional layers: skin prevention cloth, porous film, cotton bandage, and hardening material. This segmentation allows each layer to perform its specific function - the porous film specifically addresses air permeability while other layers maintain structural strength.
2Productivity
If the thin tape type glass fiber or polyester yarn is wound at irregular wound pressure or thickness according to operator method, then the casting operation is completed, but uniform pressure is not provided causing poor blood circulation
Solution Approach 1:
The patent uses a flexible porous film that can conform to the body contour and distribute pressure uniformly. This thin film structure allows the cast to adapt to irregular body surfaces while maintaining even pressure distribution, eliminating the need for highly skilled operator technique.
3Strength
If the stockinet and cotton bandage are used as the skin protector, then the cast structure is formed, but air permeability with the skin is not almost provided causing urtication and stuffiness
Solution Approach 1:
The porous film is positioned adjacent to the skin to provide a breathable barrier. This allows sweat and air to pass through while still providing the necessary protective function, preventing urtication and stuffiness while maintaining cast integrity.
4Strength
If moisture such as sweat is not smoothly discharged from the cast portion, then the cast structure remains intact, but serious bad smell and skin rash occur
Solution Approach 1:
The patent extracts the moisture discharge function by introducing a dedicated porous film layer designed specifically for sweat and air passage. This separates the moisture management function from the structural support function, allowing moisture to be actively removed while the cast structure remains stable.
5Duration of action of stationary object
If the cast is worn for a long time due to patient pain from poor air permeability, then treatment may be more thorough, but moisture discharge is inadequate causing secondary infection
Solution Approach 1:
The porous film provides continuous air circulation and moisture discharge throughout the entire cast wearing period. This continuous breathable action prevents moisture accumulation and reduces infection risk, allowing the cast to be worn for the required treatment duration without compromising skin health.
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 dual-structured medical cast provides excellent air permeability, strong adhesive strength, and improved X-ray permeability, reducing the risk of secondary infections and discomfort, while allowing for faster operation and more comfortable wear by distributing pressure evenly and preventing bending at joints.
Implementation Method 1
forming a ventilating channel so as to achieve excellent air permeability
Implementation Method 2
easily discharge moisture
Implementation Method 3
provide adhesive strength so as to prevent a bending phenomenon at each joint
Implementation Method 4
provide a stiffness strengthening means in a support and a skin protector to sufficiently endure a weight of the human body
Implementation Method 5
provide excellent permeability by being manufactured by using a special cotton yarn material, and thus, easily verify a progress status of minute bone union by improving X-ray permeability
Data Source
AI summary
The present invention relates to a medical cast having a dual structure. The present invention provides the medical cast comprising: a skin protector coming into contact with the affected area of a patient, woven by mixing and using at least two kinds of functional fibers in order to increase adhesive strength with the skin, and manufactured such that diamond-shaped mesh holes are formed in the shape of a meshed net; an inner supporting cast formed to cover the outer side of the skin protector and comprising an inside supporting cast for absorbing sweat or body waste between the casts, an inner ventilating channel for covering the outer surface of the inside supporting cast and improving air permeability, an adhesion enhancing part for increasing the elasticity of the cast, and an inner rigidity reinforcing part for providing primary rigidity for the medical cast; and an outer supporting cast formed to cover the outer side of the inner supporting cast, impregnated with a hardening solution having hydraulic properties, and comprising an outer ventilating channel formed along the circumference thereof, an adhesion enhancing part connected with the outer ventilating channel so as to provide predetermined elastic force, a cutter part provided on one surface of the outer side thereof for guiding the progressing direction of a cutter blade, and outer rigidity reinforcing parts formed on both sides of the cutter part so as to provide secondary rigidity for the medical cast.