In Situ Immobilization Kit with Antimicrobial Composite
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Solution Overview
Problem
Conventional gypsum immobilization methods are cumbersome, cause discomfort due to high density, restrict personal hygiene, and lack sterilization capabilities, while modern materials require longer preparation times and are not commonly used in trauma clinics.
Innovation Solution
A kit comprising a thermoplastic composite, a chemical heater, and water, where water acts as an oxidizing agent to heat the composite for in-situ forming, providing quick immobilization, sterilization, and antimicrobial properties through the use of cork and inorganic fillers like TiO2 and ZnO.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gypsum is used for immobilization, then it is inexpensive and non-toxic, but it has high density causing discomfort and restricts personal hygiene
Solution Approach 1:
The patent uses composite materials consisting of thermoplastic polymer matrix combined with inorganic fillers (such as aluminum hydroxide, magnesium hydroxide, or titanium dioxide) and antimicrobial agents. This composite structure provides both the mechanical strength needed for immobilization and the reduced density for patient comfort, while also incorporating antimicrobial properties to prevent infection.
2Weight of moving object
If modern thermoplastic composite materials are used, then they are lighter and water resistant, but they require longer preparation time for in-situ application
Solution Approach 1:
The patent utilizes thermoplastic materials that undergo phase change from solid to molten state when heated to their melting point (50-100°C). This parameter change allows the material to become flowable and moldable during application, then rapidly solidifies upon cooling to provide immediate immobilization. The chemical heater enables rapid heating to achieve this phase transition, significantly reducing preparation time compared to conventional materials.
Solution Approach 2:
The immobilization device exploits the phase transition of thermoplastic materials between solid and liquid states. When the chemical heater raises the temperature above the melting point, the thermoplastic material transitions to a molten state that can be easily molded around the injured body part. After molding and cooling, it transitions back to solid state, providing rapid setting and immediate immobilization without requiring long preparation or drying times.
3Productivity
If gypsum is used for immobilization, then shaping is possible within short period, but once hard further forming is not possible and repositioning is limited
Solution Approach 1:
The patent incorporates a heating element that can dynamically change the physical state of the thermoplastic material during the immobilization process. The material transitions from rigid to pliable when heated, allowing for repositioning and adjustment, then returns to rigid state when cooled, locking the final position. This dynamic property provides both rapid initial setting and flexibility for corrections if needed.
4Ease of operation
If conventional immobilization materials are used, then they provide basic immobilization, but they lack sterilization capabilities and antimicrobial properties
Solution Approach 1:
The patent integrates multiple functional components into a single composite material system: thermoplastic polymer for structural integrity, inorganic fillers for reduced density and flame resistance, and antimicrobial agents (such as silver nanoparticles, zinc oxide, or copper compounds) for infection prevention. This multi-functional composite provides immobilization, sterilization, and antimicrobial protection simultaneously, eliminating the need for separate sterilization steps and reducing infection risk.
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 kit offers rapid immobilization without discomfort, maintains hygiene, and ensures sterilization, providing antifungal and antimicrobial protection, making it suitable for emergency and clinical use.
Implementation Method 1
a chemical heater with a chemical formulation which produces heat in an exothermic reaction with water or water-containing liquid
Implementation Method 2
Water serves as an oxidizing agent for activating the chemical heater which heats up the thermoplastic composite
Implementation Method 3
a thermoplastic material with a melting point Tm between 50°C and 100°C
Implementation Method 4
heats up the thermoplastic composite to be fit for the in situ forming
Implementation Method 5
The generated steam is released through one or more openings made on the container
Data Source
Figure 1~2B
Figure 3A~3C
Figure 3D~3E
AI summary
The invention discloses a kit (90) for in situ immobilization that can be carried out wherever water is available. The kit (90) contains: - one or more immobilization devices (10); - at least one chemical heater (30) with a chemical formulation which produces heat; and - a container (20) capable of simultaneously enclosing at least one immobilization device (10) and at least one chemical heater (30). According to the preferred embodiment, the said immobilization device (10) consists of a mixture of the thermoplastic material poly(ε-caprolactone), cork as an organic filler with antifungal and antimicrobial effects, and possibly other fillers; and optionally, an additional outer layer made of cork. After bringing the core of the immobilization device (10) into the plastic state by means of an exothermic reaction, the invention provides immediate application of the device (10) onto the human or animal body, without causing any discomfort or burns.