Segmented Pressure Sensor Mat for Ulcer Prevention
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Solution Overview
Problem
Current systems for managing pressure ulcers lack the ability to reliably detect compromised tissue perfusion and optimize surface pressure at specific body regions, leading to inadequate prevention and treatment of pressure-induced ischemia and ulcers.
Innovation Solution
A system comprising sensors that monitor a person's position, orientation, and movement, processing this data to identify risks and optimize surface pressure at sites of compromised tissue perfusion, using body surface markers to focus pressure-relieving maneuvers and promote blood circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If alarm systems use vibration sensors, pressure sensors, and video cameras to detect person movement, then movement detection capability is improved, but the system cannot reliably determine if the perceived movement resulted in adequate depressurization from specific regions of the body
Solution Approach 1:
The system divides the body into discrete regions (head, torso, limbs) and tracks pressure at each region separately using multiple pressure sensors positioned on the support surface. This segmentation allows the system to determine which specific body regions have been adequately depressurized rather than treating the entire body as a single unit.
Solution Approach 2:
The patent introduces pressure-sensitive support surfaces with embedded sensors as an intermediary between the person's body and the monitoring system. These sensors directly measure surface pressure at discrete body regions, providing reliable depressurization assessment that movement sensors alone cannot provide.
2Quantity of substance
If pressure sensitive mats measure overall surface pressure, then surface pressure monitoring is improved, but the system cannot automatically and directly measure the surface pressure at discrete regions of the body nor track cumulative pressure dose at specific regions over time
Solution Approach 1:
The support surface is divided into multiple discrete sensing zones corresponding to different body regions (head, torso, hips, limbs). Each zone contains pressure sensors that independently measure pressure at that specific region, enabling the system to track cumulative pressure dose for each discrete body region over time rather than providing only overall pressure data.
3Reliability
If the system frequently changes the position of immobilized persons to relieve pressure, then pressure ulcer prevention is improved, but various factors limit compliance with turning/repositioning protocols
Solution Approach 1:
The system continuously monitors pressure at discrete body regions and provides real-time feedback to caregivers through alarms and notifications. When pressure exceeds thresholds at specific regions, the system alerts caregivers immediately, enabling responsive repositioning decisions rather than relying on fixed scheduling protocols that are difficult to comply with.
Solution Approach 2:
The patent describes systems that can provide automated care instructions to persons, enabling them to self-manage their positioning and pressure relief needs without constant caregiver intervention, thereby improving compliance with repositioning protocols.
4Stress or pressure
If support surfaces minimize overall surface pressure, then pressure distribution is improved, but the system cannot detect or differentiate among specific regions of the body to selectively modulate surface pressure
Solution Approach 1:
The support surface is segmented into multiple independently controllable zones corresponding to different body regions. Each zone can be selectively pressurized or depressurized based on real-time sensor feedback from that specific region, allowing the system to provide region-specific pressure modulation rather than uniform pressure control across the entire surface.
Solution Approach 2:
The support surface system dynamically adjusts pressure distribution in real-time based on detected body position and pressure thresholds at discrete regions. The system continuously modifies surface pressure characteristics to respond to changing patient needs, rather than maintaining static pressure patterns.
Data Source
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AI summary
A system for monitoring medical conditions including pressure ulcers, pressure- induced ischemia and related medical conditions comprises at least one sensor adapted to detect one or more person characteristic including at least position, orientation, temperature, acceleration, moisture, resistance, stress, heart rate, respiration rate, and blood oxygenation, a host for processing the data received from the sensors together with historical person data to develop an assessment of person condition and suggested course of treatment, including either suspending or adjusting turn schedule based on various types of person movement. The sensor can include one or more of bi-axial or tn-axial accelerometers, magnetometers and altimeters as well as resistive, inductive, capacitive, magnetic and other sensing devices, depending on whether the sensor is located on the person or the support surface, and for what purpose, in some embodiments, the sensor can be self-contained in that it can detect orientation and suggest repositioning independent of a host.