Wireless Pressure Sensing Dressing Assembly
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Solution Overview
Problem
Conventional pressure monitoring dressing assemblies are limited by their wired configuration, which can lead to discomfort for patients and inadequate securing of sensors, particularly when patients shift positions, and they lack the ability to accommodate different anatomical sites and sensor thicknesses, potentially causing skin damage.
Innovation Solution
A wireless pressure sensing dressing assembly with a multilayer configuration, including a patient-facing layer, foam layer, and top layer, that uses a pressure-sensitive sensor to generate electrical outputs and alert caregivers when soft tissue pressure exceeds predetermined levels, allowing for reusability and adaptable thickness to distribute focal pressure, thereby preventing skin damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wired dressing assembly is used to monitor pressure, then the sensor can be connected to a controller for continuous monitoring, but the dressing may shift position when the patient moves and the sensor may not be adequately secured
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless communication system. The sensor communicates pressure data to the controller via wireless signals, eliminating the physical cable that constrained the dressing and caused discomfort. This allows the dressing to move freely with the patient while maintaining reliable monitoring connection.
2Shape
If the dressing thickness is reduced to minimize shifting, then the dressing profile is thinner and less intrusive, but patient comfort is sacrificed and the sensor may cause skin damage
Solution Approach 1:
The patent incorporates a foam layer between the sensor and the patient's skin to provide cushioning and distribute pressure before the sensor contacts the skin. This preventive cushioning protects the skin from pressure damage while allowing the dressing to maintain an appropriately thin profile for comfort and mobility.
3Reliability
If a wired dressing assembly is used, then continuous pressure monitoring is enabled, but the dressing restricts patient movement and causes discomfort
Solution Approach 1:
The patent replaces the mechanical wired connection with a wireless communication system, allowing the dressing to adapt to various patient positions without restriction. The wireless transmission maintains continuous monitoring capability while enabling full patient mobility and position changes.
4Reliability
If conventional dressings are used with embedded sensors, then pressure sensing is enabled, but the sensors cannot be easily removed and reused in new dressings
Solution Approach 1:
The patent divides the dressing into separate modular components: the sensor, the foam layer, and the adhesive layer. This segmentation allows the sensor to be easily removed from one dressing and transferred to another, enabling reuse while maintaining measurement accuracy through proper sensor positioning and protection.
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 wireless dressing assembly effectively monitors and alerts caregivers to potential pressure ulcers, reducing the risk of soft tissue damage by correlating pressure with time, providing timely alerts and allowing for patient repositioning, while being comfortable and reusable, thus enhancing patient safety and caregiver efficiency.
Implementation Method 1
a pressure-sensitive sensor to generate electrical outputs corresponding to soft tissue pressure sensed thereby
Data Source
AI summary
A dressing assembly for providing a warning to a patient or caregiver that the patient needs attention. The dressing assembly is adapted to be applied to or near a surface of the patient's body and generate electrical outputs corresponding to soft tissue pressure and other health characteristics sensed at the surface. The dressing assembly includes a pocket formed therein for removable, secured and protected insertion of a variety of different sensors such as multiple pressure sensors.