Pressure measurement systems and methods with moisture vapor control
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Solution Overview
Problem
Existing systems for measuring patient interface pressure and managing moisture and heat have poor moisture vapor transmission rates, increasing the likelihood of decubitus ulcer formation, and lack effective pressure sensing and air flow regulation.
Innovation Solution
A cover sheet with a spacer material, a vapor permeable layer, and a pressure-sensing mat that provides air flow and visual or audible indications when pressure exceeds a threshold, correlated with changes in spacer material thickness, to prevent and treat decubitus ulcers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing pressure measurement systems are used, then pressure measurement capability is provided, but moisture vapor transmission rate is poor
Solution Approach 1:
The system is divided into separate functional layers: a pressure-sensing mat layer for measurement and a spacer material layer for moisture vapor transmission. This segmentation allows each layer to optimize its specific function without compromising the other, resolving the contradiction between pressure measurement capability and moisture vapor transmission rate.
Solution Approach 2:
The spacer material acts as an intermediary layer between the patient and the pressure-sensing mat. It provides the necessary moisture vapor transmission while allowing the pressure-sensing mat to function beneath it, thus mediating between the conflicting requirements of measurement accuracy and moisture management.
2Object-generated harmful factors
If existing systems provide moisture vapor transmission, then moisture management is improved, but pressure measurement capability is not provided
Solution Approach 1:
The invention merges two previously separate functions into a single integrated system: the pressure-sensing mat is combined with the spacer material layer. This merging allows the system to simultaneously provide both moisture vapor transmission and pressure measurement capabilities, eliminating the need to choose between the two functions.
Solution Approach 2:
The integrated cover sheet system performs multiple functions simultaneously: it provides moisture vapor transmission through the spacer material, pressure measurement through the embedded mat, and structural support. This multi-functionality resolves the contradiction by making the system universal enough to handle both moisture management and pressure monitoring without compromise.
3Object-generated harmful factors
If air flow is increased to improve moisture removal, then moisture vapor transmission is enhanced, but system complexity increases
Solution Approach 1:
The spacer material structure itself facilitates air flow and moisture removal through its inherent physical properties (porosity, channel structure) without requiring complex active regulation systems. The design allows moisture to be removed passively through the spacer material's natural air flow characteristics, thereby enhancing moisture removal while avoiding increased system complexity.
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 effectively reduces interface pressure, enhances moisture vapor transfer, and alerts caregivers to potential pressure issues, thereby preventing and treating decubitus ulcers while maintaining low costs and simplicity.
Implementation Method 1
a vapor permeable material proximal to the first surface of the spacer material
Implementation Method 2
the pressure-sensing mat can be configured to detect an increase in pressure that can be correlated to a decrease in thickness of the spacer material
Data Source
Figure 1~2
Figure 3
AI summary
A cover sheet (100) comprising: a spacer material (110) comprising an upper surface (115) and a lower surface (116) and a thickness (118) measured between them; a vapor permeable material (120) proximal to the upper surface (115) of the spacer material (110); and a pressure-sensing mat (125) proximal to the lower surface (116) of the spacer material (110).