Arc-shaped Knife Rotation for Wide Tissue Excision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional high-frequency treatment devices face challenges in efficiently excising large areas of living tissue, cleanly scraping cut surfaces, and controlling the direction of knives with irregular edges, leading to prolonged operation times and potential tissue damage.
Innovation Solution
A high-frequency treatment device featuring an arc-shaped knife that can be rotated and controlled, combined with a saline solution supply system to prevent re-adherence and facilitate tissue removal, allowing for wide-area excision and clean cut surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a needle-shaped knife portion is used in conventional high-frequency treatment devices, then the device structure is simple, but the excision area is narrow and operation time is prolonged
Solution Approach 1:
The knife portion is designed with a curved surface instead of a flat or needle-shaped blade. This curved configuration allows the knife to cover a wider excision area while maintaining a compact structure that fits within the flexible tube, thereby reducing operation time without increasing device complexity
Solution Approach 2:
The knife portion is rotated about its longitudinal axis to change the direction in which the curved surface contacts the tissue. This rotational capability in an additional dimension allows the same physical blade to effectively cover different excision areas, increasing productivity without requiring a larger blade size
2Manufacturing precision
If a needle-shaped knife is used, then the device is simple to manufacture, but the cut surface cannot be cleanly scraped
Solution Approach 1:
The curved surface of the knife portion is specifically designed to contact and scrape the cut surface of the tissue. This curved geometry allows the knife to effectively remove residual tissue and achieve a clean cut surface, improving manufacturing precision without requiring complex multi-component structures
3Productivity
If the knife portion is made wide to increase excision area, then operation time is reduced, but the knife cannot be properly supported within the flexible tube
Solution Approach 1:
The curved surface configuration allows the knife to achieve a wide effective excision area while maintaining a compact physical footprint that fits comfortably within the flexible tube. The curve distributes the contact area with the tissue, providing stable support without requiring the knife to be excessively wide
Solution Approach 2:
The knife portion is made rotatable about its longitudinal axis, allowing dynamic adjustment of its orientation during operation. This rotational capability enables the knife to adapt to different tissue geometries and maintain stable contact while achieving wide excision areas, improving productivity without compromising support stability
4Ease of operation
If a bent section or disc is used at the tip end, then tissue can be hooked and lifted, but the incised region still bleeds and requires additional hemostatic treatment
Solution Approach 1:
The curved surface of the knife portion is designed to facilitate smooth cutting through tissue while minimizing tearing and damage to blood vessels. This reduces bleeding during the excision process itself, decreasing the time required for subsequent hemostatic treatment while maintaining tissue manipulation capability
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 enables efficient excision of wide areas with reduced operation time, clean cut surfaces, and precise control over the knife's direction, alleviating operator and patient burdens.
Implementation Method 1
a high-frequency current is supplied to the knife portion, thereby cauterizing and excising a living tissue with the knife portion
Implementation Method 2
a living tissue is cauterized and excised while hooking and lifting the living tissue with the bent section of the knife portion
Implementation Method 3
a washing solution should be supplied through the channel of the endoscope to wash the bleeding region
Data Source
AI summary
A high-frequency treatment device includes a tubular body having a front end portion and a rear end portion; an operating handle having a high-frequency port and a main push rod extending through the body, the operating handle slidably fitted to the body; a front tube having a rear end portion connected to the front end portion of the body; an auxiliary push rod rotatably connected to the main push rod, the auxiliary push rod extending into the front tube; a wire fixed to the auxiliary push rod, the wire extending through the front tube; a rotary knob rotatably attached to the body, the rotary knob configured to rotate together with the auxiliary push rod and the wire; and an arc-shaped knife fixed to the wire and connected to the high-frequency port of the operating handle via the wire, the auxiliary push rod and the main push rod.