Patient-Position Bed Control for Movement Limitation Safety
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Solution Overview
Problem
Conventional bed devices require constant attention from operators to prevent hazardous situations, especially in home care settings where operators are not skilled in controlling the devices, leading to increased risk and burden.
Innovation Solution
A bed device equipped with an operation section, controller, detector, and limitation table that detects patient position and adjusts bed operations accordingly, including suspension of movements and alert notifications, to ensure safer operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alarm notification is implemented to warn of hazardous patient positions, then patient safety awareness is improved, but operator burden increases as manual intervention is still required
Solution Approach 1:
The bed device performs self-monitoring of patient position and automatically executes protective actions (limiting bed operations) without requiring operator intervention. The system serves itself by detecting hazardous positions and autonomously restricting movements that could cause harm, eliminating the need for operators to continuously monitor and manually intervene.
Solution Approach 2:
The system continuously monitors patient position through detectors and uses this feedback to automatically control bed operations. When the detector identifies a hazardous position, the controller receives feedback and automatically limits further operations, creating a closed-loop safety system that responds dynamically to patient position changes without operator involvement.
2Reliability
If automated position detection and alarm system is added, then hazardous position detection is improved, but device complexity increases
Solution Approach 1:
The safety monitoring function is merged with the existing bed control system. The detector, controller, and limitation table are integrated into the single bed control unit, combining position detection, hazard assessment, and operation limitation functions into one unified system rather than adding separate independent systems.
Solution Approach 2:
The controller serves multiple functions: it controls normal bed operations, monitors patient position through the detector, assesses hazard levels, and automatically limits operations when needed. This multi-functionality eliminates the need for separate dedicated safety systems, reducing overall device complexity while maintaining comprehensive safety monitoring.
3Reliability
If bed operation limitation based on patient position is implemented, then automatic safety control is improved, but operator flexibility decreases
Solution Approach 1:
The safety control system dynamically adjusts bed operation limitations based on real-time patient position detection. Rather than imposing fixed restrictions, the system continuously evaluates patient position and automatically modifies operation limits accordingly, allowing maximum flexibility when safe and providing necessary restrictions when hazardous conditions are detected.
Data Source
AI summary
A bed device includes: an operation section that receives an operation input; a controller that controls a movement of the bed in accordance with the operation input; a detector that detects a position of a patient on the bed; and, a limitation table that stores a limitation area set on the bed in association with a limitation content, wherein when the position of the patient detected by the detector is included in the limitation area, the limitation content is read out from the limitation table so as to control the controller in accordance with the limitation content. With this configuration, it is possible to provide a higher safety bed device which can not only notify the danger based on the bed movement but also limit the movement of the bed in accordance with the status of the patient or the bed device.