Pressure-Sensing Overlay for Decubitus Ulcer Prevention

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Solution Overview

Problem

Individuals confined to beds or surfaces for extended periods are at high risk for developing decubitus ulcers due to prolonged pressure, which existing prevention methods often fail to adequately address before ulcer formation or progression.

Innovation Solution

An apparatus featuring an overlay with integrated stimulation segments and sensors that monitor pressure points, activating vibrations or other stimuli to prompt patients to reposition themselves, either on a surface or within a garment, to prevent pressure ulcers from forming or progressing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of stationary object

If patients are confined to beds or surfaces for extended periods, then they receive adequate rest and comfort, but prolonged pressure causes decubitus ulcers to form

Engineering Contradiction:

Improveduration of confinementVSAvoidpressure-induced cell death

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary action by continuously monitoring pressure points and activating stimulation segments before ulcer formation occurs. The sensor detects pressure buildup, and the controller activates vibration or other stimulation to prompt patient repositioning before tissue damage occurs, preventing the harmful effect rather than addressing it after occurrence.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements feedback through continuous monitoring of pressure points using sensors. The sensor information is fed back to the controller, which adjusts stimulation segment activation accordingly. This closed-loop feedback ensures that patients are prompted to reposition when pressure thresholds are approached, maintaining pressure-free zones on vulnerable skin areas.

Inventive Principle:

Principle #23Feedback

2Reliability

If patients are turned regularly to prevent ulcers, then ulcer prevention is improved, but patient comfort and independence are reduced

Engineering Contradiction:

Improveulcer prevention effectivenessVSAvoidpatient independence

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system enables self-service by using sensory feedback and automated stimulation to prompt patients to reposition themselves. Rather than requiring external intervention to turn patients, the system detects pressure points and activates stimulation segments that encourage patients to independently change position, maintaining their autonomy while ensuring ulcer prevention.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The feedback mechanism provides real-time information about pressure distribution to the patient through stimulation segments. This feedback loop allows patients to perceive when repositioning is needed and take action independently, improving ulcer prevention reliability while preserving patient independence and comfort.

Inventive Principle:

Principle #23Feedback

3Reliability

If stimulation segments are activated continuously, then ulcer prevention is maximized, but energy consumption increases

Engineering Contradiction:

Improveulcer prevention effectivenessVSAvoidenergy consumption of stimulation segments

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system applies periodic action by activating stimulation segments only when pressure thresholds are approached or exceeded, rather than continuously. The sensor monitors pressure points, and the controller activates stimulation only when needed, creating an intermittent but effective prevention strategy that significantly reduces energy consumption while maintaining ulcer prevention reliability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The feedback-based control system optimizes energy usage by activating stimulation segments only in response to actual pressure conditions. The sensor continuously monitors pressure points and provides feedback to the controller, which activates stimulation only when necessary, preventing unnecessary energy consumption while ensuring effective ulcer prevention.

Inventive Principle:

Principle #23Feedback

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

Effectively prevents decubitus ulcers by ensuring regular repositioning of patients, reducing the risk of cell death and ulcer formation through continuous monitoring and targeted stimulation, thereby minimizing the risk of infection and complications.

Implementation Method 1

the stimulation segments are adapted to vibrate

Methodology Applied

Scientific EffectVibration: Vibration

Data Source

PatentUS8840573B2Apparatuses for and method of preventing decubitus ulcers

Publication Date: 2014.09.23 STRYKER CORP

AI summary

An apparatus for the prevention of decubitus ulcers includes an overlay and a plurality of stimulation segments disposed throughout the overlay, wherein the stimulation segments provide stimulation. At least one sensor is disposed within at least one of the plurality of stimulation segments. A controller is electrically connected to the at least one sensor, wherein the controller gathers data from the sensor, processes the data, and transmits instructions to the stimulation segments.