Multi-thread Coil Reduces Impedance in High-Frequency Treatment Instrument
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Solution Overview
Problem
High-frequency treatment instruments face challenges in efficiently applying high-frequency current to treatment portions due to high impedance, which hinders effective treatment and can complicate procedures.
Innovation Solution
The use of a flexible tube with a multiple-thread coil made of wound conductive wires, where the conductive wires are arranged to increase cross-sectional area and reduce length, along with an operative wire composed of materials with varying conductivity and mechanical properties, allows for efficient high-frequency current application to the treatment portion without radial wire rods, thereby decreasing impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-thread coil is used, then the structure is simple, but the impedance against high-frequency current is high
Solution Approach 1:
The patent divides a single-thread coil into multiple parallel threads (e.g., three threads). Each thread carries a portion of the high-frequency current, effectively reducing the total impedance. The segmented structure maintains electrical connectivity while lowering resistance to current flow.
Solution Approach 2:
Multiple conductive wires are merged into a single multi-thread coil structure that functions as one electrical component. The wires are electrically connected in parallel, combining their conductive properties to achieve lower overall impedance while maintaining a compact form factor.
2Reliability
If the cross section of conductive wires is increased, then the impedance decreases, but the length of the coil increases
Solution Approach 1:
Instead of increasing the cross-sectional area of a single wire (which would lengthen the coil), the patent transitions to a multi-thread configuration where multiple thinner wires are arranged in parallel. This dimensional reorganization achieves equivalent or better conductive performance without increasing the coil's length along the flexible tube.
3Reliability
If a wire rod is added in the radial direction to decrease impedance, then the impedance decreases, but the device complexity increases
Solution Approach 1:
The patent extracts the impedance-reduction function from a separate radial wire rod component and integrates it directly into the coil structure itself. The multi-thread coil design inherently provides low impedance without requiring additional radial support elements, simplifying the overall device architecture.
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 configuration enables efficient application of high-frequency current to the treatment portion, reducing impedance and facilitating quicker, easier treatments while maintaining mechanical integrity and reducing patient burden.
Implementation Method 1
The flexible tube of the high-frequency treatment instrument is made of a plurality of wound conductive wires and is provided with a multiple-thread coil connected electrically to the treatment portion. The high-frequency current is applied to the multiple-thread coils.
Implementation Method 2
a treatment portion located on the distal end of the flexible tube where the high-frequency current is applied
Data Source
AI summary
A high-frequency treatment instrument 1 comprises a flexible tube 3 which is inserted into a body cavity and a treatment portion 2 which is located on the distal end of the flexible tube 3 when a high-frequency current is applied. In this high frequency treatment instrument 1, the flexible tube 3 is formed by a plurality of wound conductive wires and is provided with a multiple-thread coil 6 connected electrically to the treatment portion 2, and the high-frequency current is applied to the multiple-thread coil 6.