Surgical Instrument Probe Electrode Spacing for Controlled Arc Discharge
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Solution Overview
Problem
Conventional surgical treatment instruments using high-frequency current face challenges in preventing voltage exceeding a predetermined value during tissue treatment, leading to potential tissue damage and inefficiencies in discharge modes.
Innovation Solution
A surgical treatment instrument featuring a probe with a conductive shaft rod member and a hollow portion filled with air or inert gas, where the distance between the probe and the shaft rod member is set to prevent spark discharge while allowing arc discharge, using a voltage range that avoids excessive voltage application to the tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the distance between the first electrode and second electrode is reduced to enable discharge at lower voltage, then the discharge voltage is reduced, but spark discharge may occur causing tissue damage
Solution Approach 1:
The second electrode is positioned at a specific local distance from the first electrode to create a controlled discharge zone. This localized geometric arrangement ensures that discharge occurs at a predetermined voltage level without progressing to harmful spark discharge, resolving the contradiction between achieving low discharge voltage and preventing tissue damage.
Solution Approach 2:
The invention changes the voltage parameter by controlling the electrode distance, thereby adjusting the discharge characteristics. By setting the distance to a specific value, the system transitions from high-voltage spark discharge to controlled arc discharge at lower voltage, achieving both energy efficiency and safety.
2Reliability
If high voltage is applied to ensure reliable discharge, then discharge reliability is improved, but voltage may exceed predetermined values causing tissue damage
Solution Approach 1:
The electrode distance is pre-set during instrument design to establish the optimal discharge characteristics before use. This preliminary geometric configuration ensures that when voltage is applied, discharge occurs reliably at the intended voltage level without the risk of excessive voltage, as the physical distance acts as a built-in control mechanism.
3Object-affected harmful factors
If the electrode distance is increased to prevent spark discharge, then tissue safety is improved, but discharge may not occur reliably at lower voltages
Solution Approach 1:
The invention optimizes the voltage parameter by precisely controlling the electrode distance. This specific geometric parameter setting creates a discharge threshold that ensures reliable arc discharge at appropriate voltages while preventing spark discharge at higher voltages, simultaneously achieving both reliability and safety.
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 effectively prevents voltage exceeding a predetermined value, ensuring safe and controlled tissue treatment by avoiding spark discharge and stabilizing the discharge mode, thus enhancing the precision and safety of the surgical instrument.
Implementation Method 1
The electric knife is an apparatus configured to radiate a high-frequency current onto a living tissue from a distal end of an electrode at a tip of the electric knife to perform dissection or hemostasis of the living tissue using an arc discharge or Joule heat generated by the high-frequency current.
Implementation Method 2
The electric knife is an apparatus configured to radiate a high-frequency current onto a living tissue from a distal end of an electrode at a tip of the electric knife to perform dissection or hemostasis of the living tissue using an arc discharge or Joule heat generated by the high-frequency current.
Implementation Method 3
a portion of the second electrode closest to the first electrode is located away from the first electrode by a distance at which a discharge occurs at a voltage lower than a voltage at which a spark discharge occurs between the first and second electrodes and higher than a voltage at which an arc discharge occurs between the first and second electrodes
Implementation Method 4
a portion of the second electrode closest to the first electrode is located away from the first electrode by a distance at which a discharge occurs at a voltage lower than a voltage at which a spark discharge occurs between the first and second electrodes and higher than a voltage at which an arc discharge occurs between the first and second electrodes
Data Source
AI summary
A handpiece is a surgical treatment instrument to treat a living tissue using electric energy and includes a probe configured to extend in a longitudinal direction from a proximal end portion to a distal end portion, and enabled to apply the electric energy to the living tissue and a shaft rod member configured to be disposed inside the probe, a portion of the shaft rod member closest to the probe being located away from the probe by a distance at which a discharge occurs at a voltage lower than a voltage at which a spark discharge occurs between the probe and the shaft rod member and higher than a voltage at which an arc discharge occurs between the probe and the shaft rod member.