Patient-Position Bed Control for Hazardous Movement Limitation
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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 may not be 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, allowing for automatic limitation and notification of potentially hazardous situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alarm notification is implemented when patient is in hazardous position, then safety awareness is improved, but operator burden increases due to need for constant attention
Solution Approach 1:
The bed device automatically detects patient position and limits operations without operator intervention. The system serves itself by autonomously monitoring patient location and controlling bed movements based on pre-set limitation areas, eliminating the need for operators to constantly monitor and manually intervene.
Solution Approach 2:
The system continuously monitors patient position and provides real-time feedback by comparing detected positions with limitation areas. When a hazardous position is detected or an operation would move the patient into a limitation area, the system automatically responds by limiting the operation, creating a closed-loop safety mechanism.
2Ease of operation
If manual monitoring and intervention is required for safe operation, then operational control is maintained, but response time increases for unskilled operators
Solution Approach 1:
Limitation areas and corresponding limitation contents are pre-configured in the system before operation begins. The controller stores multiple limitation areas with associated control actions, so when a hazardous situation is detected, the appropriate pre-programmed response is immediately executed without requiring operator decision-making or manual intervention.
3Reliability
If bed operation limitation is automatically implemented based on patient position, then safety is improved, but device complexity increases
Solution Approach 1:
The bed bottom is divided into multiple independently controllable sections (first bottom part, second bottom part, third bottom part, fourth bottom part). Each section can be controlled separately with different limitation rules applied to different areas, allowing complex safety requirements to be managed through modular, segmented control rather than a monolithic system.
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.