Adaptive Patient Support Surface Control for Pressure Ulcer Prevention
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Solution Overview
Problem
Current person support surfaces, such as hospital bed mattresses, fail to adequately prevent pressure ulcers and superficial lesions due to inadequate regulation of interface pressure, shear, and temperature, despite advancements in minimizing force between the support surface and patients.
Innovation Solution
An inflatable person support surface with a control system that includes sensors to monitor pressure, shear, and temperature, and a processor to calculate a surface performance index, adjusting the fluid supply to maintain optimal conditions, which can be integrated with electronic medical records for personalized patient care.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional static support surfaces are used, then device complexity is low, but pressure ulcer prevention effectiveness is insufficient
Solution Approach 1:
The patent implements dynamic adjustment of bladder pressure through a control system that continuously monitors interface pressure, shear force, and temperature via sensors, and adjusts fluid supply to maintain optimal support surface characteristics, transforming the static mattress into an adaptive system that responds to real-time patient conditions
Solution Approach 2:
The control system incorporates sensors that measure interface pressure, shear force, and temperature, feeding this data back to the processor which calculates a surface performance index and adjusts fluid supply accordingly, creating a closed-loop control system that continuously optimizes pressure ulcer prevention
2Reliability
If multiple sensors and control mechanisms are added, then pressure ulcer prevention improves, but device complexity increases
Solution Approach 1:
The patent combines multiple sensing functions (pressure, shear, temperature) into an integrated control system that processes all inputs through a unified surface performance index calculation, merging separate monitoring functions into a coordinated control architecture that manages fluid supply to multiple bladders simultaneously
Solution Approach 2:
The control system serves multiple functions: monitoring interface pressure, measuring shear force, detecting temperature, calculating surface performance index, and regulating fluid supply to prevent pressure ulcers, making a single system that performs diverse protective functions
3Reliability
If dynamic adjustment of pressure and temperature is implemented, then tissue oxygenation improves, but energy consumption increases
Solution Approach 1:
The control system adjusts fluid supply in periodic cycles, inflating and deflating bladders in alternating patterns to maintain tissue oxygenation while allowing energy dissipation during deflation phases, rather than maintaining constant high pressure
Data Source
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AI summary
A control system of a patient support surface calculates a surface performance index as a function of pressure and shear. The control system also receives information from an electronic medical record (EMR) corresponding to a person's susceptibility of developing at least one of a pressure ulcer and a superficial lesion and adjusts at least one of a component and a characteristic of the person support surface based on the information.