Medical Treatment Device Resistance Lookup Table Control
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Solution Overview
Problem
Existing medical treatment devices face challenges in achieving precise temperature control for biotissues due to variable tissue areas and the need for accurate resistance-temperature characteristics of resistance elements, leading to unstable joining strength and increased costs.
Innovation Solution
A treatment device with a heat transfer portion, a resistance element, and a controller that uses a time-power list to adjust power supply based on resistance value changes, simplifying control and reducing costs by eliminating the need for precise resistance-temperature characteristic management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If feedback control with temperature measurement based on resistance value change is used, then temperature control precision is improved, but device complexity and manufacturing costs increase due to the need for accurate resistance-temperature characteristics management
Solution Approach 1:
The patent extracts the resistance-temperature characteristic management from the feedback control system. Instead of requiring continuous monitoring and adjustment based on resistance changes, the system uses a pre-stored lookup table (resistance-value lookup table) that maps resistance values to corresponding temperatures. This extraction simplifies the control logic while maintaining temperature control precision.
Solution Approach 2:
The patent applies preliminary action by pre-calculating and storing the resistance-temperature relationships in a lookup table during device manufacturing or initialization. This eliminates the need for real-time complex calculations and characteristic management during actual operation, reducing control complexity while maintaining precision.
2Measurement precision
If feedback control with temperature measurement based on resistance value change is used, then temperature control precision is improved, but manufacturing costs increase due to the need for uniformity management and individual measurement
Solution Approach 1:
The patent extracts the resistance-temperature characteristic management from the feedback control system. Instead of requiring continuous monitoring and adjustment based on resistance changes, the system uses a pre-stored lookup table (resistance-value lookup table) that maps resistance values to corresponding temperatures. This extraction simplifies the control logic while maintaining temperature control precision.
Solution Approach 2:
The patent applies preliminary action by pre-calculating and storing the resistance-temperature relationships in a lookup table during device manufacturing or initialization. This eliminates the need for real-time complex calculations and characteristic management during actual operation, reducing control complexity while maintaining precision.
3Device complexity
If constant power supply to resistance element is used, then device complexity is reduced, but temperature control precision deteriorates due to variable tissue area causing unstable anastomosis temperature
Solution Approach 1:
The patent implements feedback control by continuously monitoring the resistance value of the resistance element and using this information to adjust the power supply. The controller reads the resistance value from the lookup table to determine the corresponding temperature and adjusts power supply accordingly, ensuring precise temperature control despite variable tissue area.
Solution Approach 2:
The patent applies dynamics by transitioning from constant power supply to dynamic power adjustment. The power supply is continuously adjusted based on real-time resistance value measurements and the corresponding temperature information from the lookup table, enabling adaptive temperature control that responds to changing tissue conditions.
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 device achieves precise temperature control for biotissues while simplifying the device and control processes, reducing costs and complexity, and maintaining consistent joining strength across varying tissue areas.
Implementation Method 1
a resistance element configured to be supplied power to heat the heat transfer portion
Implementation Method 2
a treatment tool including a heat transfer portion configured to transfer heat to the biotissue
Data Source
AI summary
A treatment device for a medical treatment heats a biotissue. The device includes a treatment tool which includes a heat transfer portion and a resistance element, a storage section which stores a time-power list including time-power relations, and a controller. The controller includes a resistance value acquiring section acquiring a resistance value of the resistance element, a power supplying section supplying the power to the resistance element, and a control section. The control section causes the power supplying section to supply a predetermined state detection power in a state detection period, calculates a change of the resistance value in the state detection period, acquires the time-power relation corresponding to the change of the resistance value, and causes the power supplying section to supply the power based on the acquired time-power relation.