Robot Arm Patient Positioning With Emergency Manual Axis Release
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Solution Overview
Problem
Existing patient positioning devices in medical diagnostic and therapy systems, particularly in particle therapy, pose safety risks during emergency situations as they often disable robot arms, making it difficult to access patients manually, which can compromise safety and hinder rescue or treatment efforts.
Innovation Solution
A positioning device that can be switched to a manual operating mode, allowing partial or complete manual control of the patient receiving device, including unlocking specific axes of a multi-axis robot arm, enabling manual movement of the patient even in emergency situations, such as power failures or system malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the robot arm is disabled in emergency situations to prevent erroneous movements, then patient safety is improved, but access to the patient becomes difficult
Solution Approach 1:
The positioning device enables dynamic switching between automatic control mode and manual operating mode. In normal operation, the robot arm operates automatically for precise positioning. In emergency situations, the system can be switched to manual mode, allowing operators to directly control the robot arm to access the patient while maintaining safety through controlled manual operation.
Solution Approach 2:
The system changes the control parameter from automatic control to manual control in emergency situations. This parameter change allows the robot arm to transition from a locked automatic mode to a manually controllable mode, enabling patient access while maintaining safety through the deliberate manual operation.
2Manufacturing precision
If automatic control is used for precise positioning, then positioning accuracy is improved, but safety during control failure is worsened
Solution Approach 1:
The manual operating mode acts as an intermediary between automatic control failure and direct patient risk. When automatic control fails, the system transitions to manual mode as an intermediate state, allowing operators to take control and prevent potential harm while maintaining positioning capability.
Solution Approach 2:
The system dynamically switches control modes based on operational conditions. During normal operation, automatic control provides precise positioning. Upon detecting control failure or emergency conditions, the system dynamically transitions to manual mode to maintain safety while preserving positioning functionality.
Data Source
AI summary
The invention relates to a positioning device for positioning a patient in a medical device comprising a patient receiving device for placing a patient and a robot arm having a plurality of movement axes for positioning the patient receiving device in a room. The positioning device can be placed into a manual operating mode in which a position of the patient receiving device in the room can be changed manually. The invention also relates to a method for operating the positioning device, comprising: providing a normal operating mode for positioning the patient receiving device automatically at a position predefined by a control device; providing a manual operating mode for manually changing a position of the patient receiving device; and switching from the normal operating mode into the manual operating mode if a switchover condition is present. The invention further relates to an irradiation device having the positioning device.