Multi-Layer Medical Cooling Pad Thermal Management
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Solution Overview
Problem
Current cooling therapies for medical patients, such as those suffering from stroke or head trauma, often face challenges in effectively and efficiently providing systemic cooling due to limitations in thermal exchange technologies, which can lead to delayed or inadequate neuroprotection and tissue loss.
Innovation Solution
A medical cooling pad with multiple layers, utilizing a combination of thermal-exchange fluids, including a chilled fluid circulation layer and a semi-frozen or gel-based containment layer, for enhanced thermal communication and conductivity, allowing for targeted and efficient cooling of patients through a combination of adhesive and conformable materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-layer cooling pad with circulated fluid is used, then the device complexity is low, but the thermal exchange efficiency and cooling effectiveness are insufficient
Solution Approach 1:
The cooling pad is divided into multiple functional layers: a first layer containing circulated thermal-exchange fluid and a second layer containing a different thermal-exchange fluid (such as gel or phase-change material). This segmentation allows each layer to contribute differently to thermal exchange, improving overall cooling effectiveness while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The pad employs composite construction combining different thermal-exchange fluids in separate layers. The first layer uses circulated fluid (e.g., water or glycol solution) while the second layer uses materials with different thermal properties (e.g., gel or phase-change materials), creating a composite structure that leverages the advantages of each material type for enhanced thermal management.
2Reliability
If thermal exchange area is increased to improve cooling coverage, then the neuroprotection effectiveness improves, but the pad size and device complexity increase
Solution Approach 1:
The multi-layer structure enables different regions of the pad to have optimized thermal properties. The first layer with circulated fluid provides active cooling in areas requiring dynamic temperature control, while the second layer with gel or phase-change materials provides passive cooling and thermal buffering in other areas, allowing large contact area without uniform complexity throughout.
3Speed
If rapid cooling is achieved through circulated cold fluid, then the neuroprotection timing is improved, but the control precision and temperature uniformity become difficult to maintain
Solution Approach 1:
The second layer acts as an intermediary between the circulated fluid in the first layer and the patient's body. This intermediate layer with gel or phase-change materials buffers and distributes thermal energy more uniformly, preventing direct thermal shocks from the circulated fluid while maintaining rapid overall cooling, thus improving both cooling speed and temperature uniformity.
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 medical cooling pad effectively transfers thermal energy across a significant area of the patient's skin, providing rapid and controlled cooling that can limit neurological damage and improve patient outcomes by facilitating neuroprotection and hastening recovery.
Implementation Method 1
Thermal energy is then exchanged between the patient and the circulated fluid so that when the temperature of the fluid is lower than the desired temperature of the patient, the patient is cooled
Implementation Method 2
fluid such as water or air circulated through the pad
Implementation Method 3
the second thermal-exchange fluid may comprise liquid in a gel form. For example, a gel material comprising a water/polymer matrix may be utilized
Data Source
AI summary
A medical pad has multiple layers. A first layer is for containing a first thermal-exchange fluid circulatable therethrough, with the medical pad being operable for thermal exchange between the first thermal-exchange fluid and a patient through a first side of the first layer. A second layer of the medical pad is interconnected to a second side of the first layer, opposite to the first side of the first layer. The second layer encloses a second thermal-exchange fluid that may have a freezing point of 0° C. or less. The medical pad is operable for thermal exchange between the second thermal-exchange fluid and the patient.