Variable Speed Bed Lift Control for X-Ray Patient Safety
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Solution Overview
Problem
Operators face challenges in safely lifting patients during X-ray diagnostics, particularly when the bed reaches a 90° angle, as patients with bent or weak legs may fall forward, requiring constant attention to prevent discomfort and ensure safety.
Innovation Solution
A bed apparatus with a bed stop position controller and pressure sensors that automatically adjust the lifting speed and stop the bed at predetermined angles, reducing operator burden and enhancing patient safety by preventing forward falls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the bed lifting speed is increased to improve productivity, then the lifting operation becomes faster and more efficient, but the patient may fall forward or feel uneasy when the lifting angle reaches about 90°
Solution Approach 1:
The patent applies dynamics by making the bed lifting speed variable rather than constant. The control unit adjusts the lifting speed dynamically based on the bed's lifting angle, specifically reducing speed when the angle approaches 90° to prevent patient discomfort or forward falling, while allowing higher speeds at other angles to maintain productivity.
Solution Approach 2:
The patent changes the speed parameter of the bed lifting operation based on the lifting angle. By modifying the speed parameter dynamically during the lifting process, the system achieves both efficient operation and patient safety, resolving the contradiction between productivity and reliability.
2Reliability
If the operator constantly watches the patient condition to ensure safety, then patient safety is improved, but the operator burden increases and operation efficiency decreases
Solution Approach 1:
The patent implements self-service by enabling the bed apparatus to automatically monitor and adjust its operation based on patient position and lifting angle. The control unit continuously tracks the bed angle and automatically reduces speed when necessary, eliminating the need for constant operator attention while maintaining patient safety.
Solution Approach 2:
The system uses feedback from sensors that detect bed lifting angle and patient position to automatically adjust lifting speed. This closed-loop control provides continuous safety monitoring without requiring operator intervention, reducing operator burden while maintaining high reliability.
3Reliability
If the bed lifting speed is varied to prevent patient discomfort, then patient safety is improved, but the lifting operation becomes more complex and requires additional control mechanisms
Solution Approach 1:
The control unit performs multiple functions: it controls bed lifting speed, monitors lifting angle, detects patient position, and automatically adjusts operation parameters. By consolidating these functions into a single control system, the patent manages complexity while achieving improved patient safety through automated speed variation.
Data Source
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AI summary
A bed apparatus includes a bed, a bed lifting unit that lifts the bed, and a bed stop position control unit that controls the bed lifting unit such that the bed stops at a position out of the maximum stroke according to a predetermined stop condition.