Gripping Device Pull-Wire Incision for Compact Tissue Cutting

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Solution Overview

Problem

Existing gripping devices for incising a target site in living tissue often require a wire to push the incision blade, which can make the device larger and less efficient, and may interfere with the tissue during incision.

Innovation Solution

A gripping device with a first wire that moves from a first position toward a distal end upon pulling, allowing for a thinner design and smoother incision, and includes a second wire for returning the incision portion to its initial position, with movable connection points to prevent interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a wire pushes the incision blade from proximal end toward distal end, then the incision function is achieved, but the device size increases and mechanical interference with tissue occurs

Engineering Contradiction:

Improveincision functionVSAvoiddevice size

Core Design Contradiction:

Ease of operationVSVolume of moving object

Solution Approach 1:

The patent inverts the conventional pushing mechanism by using a pulling mechanism. The wire is pulled from the proximal end toward the distal end, causing the incision blade to move forward through friction or direct engagement, rather than being pushed. This inversion reduces the required wire diameter and device complexity while maintaining effective incision capability.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the traditional mechanical pushing system with a more efficient pulling system. By substituting the push mechanism with a pull mechanism, the wire can be thinner and more flexible, reducing device volume while maintaining or improving incision performance. The pulling action allows for better control and reduced mechanical interference with the tissue.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Force

If a thick wire is used to push the incision blade, then sufficient force is provided, but the device becomes larger and less flexible

Engineering Contradiction:

Improveincision forceVSAvoidwire diameter

Core Design Contradiction:

ForceVSLength of moving object

Solution Approach 1:

The patent inverts the force application method from pushing to pulling. The pulling mechanism allows the wire to engage the incision blade more efficiently, generating sufficient incision force with a thinner wire. The friction or direct engagement between the pulled wire and the blade creates effective cutting force without requiring a thick, rigid wire structure.

Inventive Principle:

Principle #13The other way round (Inversion)

3Device complexity

If the wire structure is simplified, then device complexity is reduced, but control precision over the incision blade decreases

Engineering Contradiction:

Improvewire structure complexityVSAvoidincision precision

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent replaces a complex mechanical pushing system with a simpler pulling system. The simplified wire structure pulls the incision blade through friction or direct engagement, maintaining precise control with fewer components. This substitution reduces device complexity while preserving or enhancing incision precision through the more direct force application of the pulling mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 a compact size, efficient incision with reduced force, and multiple incisions without mechanical interference, while also allowing for coagulation of the target site.

Implementation Method 1

the incision portion moves from a first position toward a distal end of the gripping portion according to pulling of at least one of the first end and the second end to incise the living tissue

Methodology Applied

Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS12383329B2Gripping device and treatment tool

Publication Date: 2025.08.12 OLYMPUS CORPORATION(JP)

AI summary

A gripping device includes: a gripping portion including a first gripping piece including a first gripping surface, and a second gripping piece including a second gripping surface, the second gripping surface being configured to grip a living tissue; and a first wire extending from a first end to a second end of the first wire, an incision portion that is a part of the first wire between the first end and the second end being bridged between the first gripping surface and the second gripping surface, the first wire being configured such that the incision portion moves from a first position toward a distal end of the gripping portion according to pulling of at least one of the first end and the second end to incise the living tissue gripped between the first gripping surface and the second gripping surface.