Rotational Disk Position Measurement for Transcatheter Simulation
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Solution Overview
Problem
Current devices for simulating transcatheter operations face challenges in accurately reproducing modulated friction and pulsation forces, requiring complex and costly mechanisms for force feedback, which are less reliable and more space-consuming, especially for rotational motion.
Innovation Solution
A device with rotationally mounted disks and limiters that provide precise position measurement and force feedback using angle sensors, fewer moving parts, and adjustable resistance mechanisms to simulate organ interactions, including a system with a manikin, surgical instrument, and computing device for visual feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If linear motion measurement systems with multiple trolleys are used, then position measurement capability is achieved, but device complexity and space requirements increase
Solution Approach 1:
The patent replaces complex linear motion measurement systems with a rotational measurement system using angle sensors. Instead of using multiple trolleys with linear displacement sensors, the invention uses a single rotating element with angular position measurement, substituting mechanical linear measurement with rotational measurement to reduce complexity.
Solution Approach 2:
The patent transforms the measurement problem from linear dimension to rotational dimension. By converting linear position measurement into angular position measurement of a rotating element, the system achieves equivalent measurement capability with reduced complexity and space requirements.
2Force
If linear motion force feedback mechanisms are implemented, then physical stimuli are provided, but drive complexity increases
Solution Approach 1:
The patent replaces complex linear motion force feedback mechanisms with a rotational force feedback system. By using rotational actuators and angle sensors instead of linear actuators and displacement sensors, the system achieves equivalent force feedback functionality with simpler drive mechanisms.
3Adaptability or versatility
If telescopic tubes are used between carriages, then structural flexibility is achieved, but reliability decreases due to dirt accumulation
Solution Approach 1:
The patent eliminates telescopic tubes and their associated sealing problems by extracting this problematic component from the system. The design uses fixed structural elements with rotational movement instead of extendable telescopic sections, removing the source of reliability issues while maintaining necessary adaptability.
4Device complexity
If rotational motion measurement is used instead of linear motion, then device complexity is reduced, but measurement capability must be maintained
Solution Approach 1:
The patent maintains measurement precision by transforming the measurement domain from linear to rotational. The angular position of the rotating element directly corresponds to the position being measured, preserving measurement accuracy while utilizing simpler rotational sensors instead of complex linear displacement sensors.
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
The solution enhances the realism of transcatheter operation simulations with improved reliability and reduced complexity, offering better modulated friction and pulsation forces, and reduced space requirements while maintaining accuracy and reliability.
Implementation Method 1
the disk and the individual limiters are fitted with means of resistance that act—with an appropriately matched force or torque—on the disk and on each of the limiters counteracting their movement under the influence of the pressure from the surgical instrument
Data Source
AI summary
A device designed for improving the skills necessary to perform operations, by practising on a machine that simulates the properties of selected body parts of living organisms. More specifically, electromechanical devices/systems for practising transcatheter operations with the use of surgical instruments.