Medical Device Drive Apparatus Acceleration-Based Force Calculation
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Solution Overview
Problem
Remote operation of medical devices like guide wires in blood vessels faces challenges in accurately detecting minute forces, leading to potential guide wire bending or breaking due to lack of precise force feedback, which is difficult with existing systems.
Innovation Solution
A medical device drive apparatus comprising a main drive unit for long-distance movement and a sub-drive unit with a sensor to detect acceleration, allowing for accurate calculation of forces applied to the guide wire without the need for specialized force sensors, enabling efficient movement and precise force detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a remotely operatable robot is used to insert the guide wire, then the doctor can avoid X-ray exposure, but the doctor cannot acquire information on slight force when directly operating by hand
Solution Approach 1:
The patent replaces direct mechanical force sensing with acceleration-based detection. The acceleration sensor detects the acceleration of the movable portion, and force information is calculated based on this acceleration data, substituting complex mechanical force sensors with simpler acceleration measurement and calculation.
Solution Approach 2:
The patent introduces acceleration as an intermediary parameter to indirectly measure force. Instead of directly measuring force with complex sensors, the system measures acceleration of the movable portion and calculates force information from this intermediate data, simplifying the sensing mechanism while maintaining detection capability.
2Measurement precision
If a force sensor is installed to detect slight force changes, then force detection accuracy improves, but device complexity increases
Solution Approach 1:
The patent substitutes complex force sensors with simpler acceleration sensors. By measuring acceleration and calculating force information mathematically, the system achieves force detection capability without requiring sophisticated mechanical force sensing equipment, thereby reducing device complexity.
Solution Approach 2:
The patent creates a virtual force measurement system by copying the relationship between acceleration and force through calculation. Instead of directly measuring force, the system measures acceleration and computes force information, creating a functional equivalent that is simpler to implement.
3Productivity
If the main drive unit is used for long-distance movement, then movement efficiency improves, but detection of minute force changes becomes difficult
Solution Approach 1:
The patent segments the drive system into a main drive unit for long-distance movement and a sub-drive unit with acceleration sensor for precise force detection. This segmentation allows each component to specialize: the main drive provides efficient movement while the sub-drive with its sensor enables accurate minute force detection through acceleration measurement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for accurate detection of minute forces in blood vessels, reducing the risk of guide wire damage and enhancing operational safety and efficiency during remote operations.
Implementation Method 1
a sensor for acquiring information on acceleration of the sub-movable portion
Data Source
AI summary
A medical device drive apparatus for inserting an elongated medical device into a blood vessel includes a sub-drive unit that enables fine movement of the elongated medical device and a main drive unit that enables long distance movement of the elongated medical device, in which the sub-drive unit includes a sub-drive unit body and a sub-movable portion movable with respect to the sub-drive unit body, and information on minute force applied to the elongated medical device is calculated based on information on acceleration of the sub-movable portion.