Patient Support Apparatus with Pressure Ulcer Risk Detection
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Solution Overview
Problem
Current patient support systems fail to effectively monitor and mitigate pressure ulcers by not adequately assessing patient angles and pressure distribution, leading to inadequate prevention and management of pressure sores.
Innovation Solution
A patient support apparatus with sensors in the back, leg, and foot areas to measure angles and pressure, coupled with a control system to determine risk areas and adjust air bladder inflation to prevent pressure ulcers, along with a hands-free air pump system for easy operation and a timer for regular patient turning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensors and control systems are added to monitor patient angles and pressure distribution, then pressure ulcer prevention capability is improved, but device complexity increases
Solution Approach 1:
The mattress is divided into multiple independent air bladders arranged in a grid pattern, with sensors positioned in specific zones (head, torso, legs, feet) to monitor local pressure and angle conditions. This segmentation allows targeted monitoring and control without requiring complete system complexity.
Solution Approach 2:
The control system continuously receives data from pressure sensors and angle sensors, processes this information to assess pressure ulcer risk, and automatically adjusts air bladder inflation accordingly. This closed-loop feedback mechanism enables automated prevention without manual intervention.
2Reliability
If multiple air bladders with individual control are used to adjust pressure distribution, then pressure management effectiveness is improved, but device complexity increases
Solution Approach 1:
Different regions of the mattress (head zone, torso zone, leg zone, foot zone) have different numbers and configurations of air bladders tailored to the specific pressure management needs of each body region. This allows optimized pressure control where needed without uniformly increasing complexity across the entire mattress.
Solution Approach 2:
The air bladders are dynamically inflated and deflated by the control system based on real-time sensor data, allowing the mattress to adapt its pressure distribution characteristics to changing patient positions and risk factors rather than maintaining a fixed configuration.
3Ease of operation
If a hands-free air pump system is implemented for easy operation, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The air pump system operates automatically based on signals from the control system, which monitors patient needs through sensors. The system self-regulates air bladder inflation without requiring manual operation, making it accessible even to patients with limited mobility while the automation handles the operational complexity.
Data Source
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AI summary
A patient support apparatus includes a seat section, a head section rotatably coupled to the seat section, and a leg section rotatably coupled to the seat section to form a support surface for a patient. The support surface has a back area where the patient's back is positioned when the patient is positioned on the support surface, a leg area where the patient's legs are positioned when the patient is positioned on the support surface, and a foot area where the patient's legs are positioned when the patient is positioned on the support surface.