Endoscopic Traction Hook and Anchor for Lesion Retraction

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Solution Overview

Problem

Existing endoscopic procedures face challenges in applying traction or tension to lesions or body lumens to facilitate medical procedures such as endoscopic submucosal dissection (ESD), as current methods lack effective tools for grasping and lifting tissues during resection.

Innovation Solution

Medical devices and systems featuring traction hooks, anchors, and connecting members are designed to grasp and apply tension to tissues, including retractable mechanisms and actuators for controlled deployment and tension adjustment, allowing for enhanced traction and tissue resection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a traction device is introduced to apply tension to tissue, then tissue traction and visualization are improved, but device complexity increases

Engineering Contradiction:

Improvetissue traction capabilityVSAvoiddevice structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The traction device is divided into separate functional components: a traction hook for grasping tissue, an anchor for securing to the tissue wall, and a cable connecting them. This segmentation allows each component to be optimized independently while maintaining overall simplicity in the endoscopic configuration.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cable is nested within the endoscope shaft, and the traction hook and anchor are deployed from the distal end of the shaft. This nesting approach allows the complex traction mechanism to be contained within the relatively simple endoscopic framework, minimizing the increase in overall device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Productivity

If a surgical knife is used to remove the lesion, then resection is achieved, but the need for traction to facilitate access remains unmet

Engineering Contradiction:

Improvelesion removal efficiencyVSAvoidaccess to lesion

Core Design Contradiction:

ProductivityVSEase of operation

Solution Approach 1:

The traction hook is deployed to grasp the lesion and apply traction before the surgical knife is introduced for resection. This preliminary action of lifting and tensioning the lesion facilitates subsequent access by the surgical knife, improving overall productivity without requiring the knife itself to have traction capabilities.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If lifting agent is injected under the lesion, then access is facilitated, but effective traction and tension application is insufficient

Engineering Contradiction:

Improveaccess to lesionVSAvoidtraction force

Core Design Contradiction:

Ease of operationVSForce

Solution Approach 1:

The cable acts as an intermediary element that transmits force from the proximal handle to the distal traction hook and anchor. This mechanical intermediary provides effective traction and tension application, overcoming the insufficiency of liquid lifting agents by converting hydraulic pressure into direct mechanical pulling force.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250339136A1Medical devices, systems, and methods for providing traction to tissue

Publication Date: 2025.11.06 BOSTON SCIENTIFIC SCIMED INC

AI summary

Disclosed are medical devices. In an aspect, a medical device of the disclosed medical devices may comprise a traction hook configured for grasping tissue. The medical device may further comprise an anchor. In some aspects, the medical device may additionally comprise a member connecting the anchor to the traction hook.