Detachable Endoscopic Polyp Retrieval Device for Clear Camera Views

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Solution Overview

Problem

Existing endoscopic procedures face challenges such as obstructed camera views and occupied working channels during polyp removal, leading to missed cancerous tissue and increased procedural time due to the need for repeated endoscope insertion.

Innovation Solution

A retrieval device with a flexible loop, mesh, and cord system that allows for the formation of a constricted mesh bag around the target tissue, detachable from the sheath, enabling simultaneous capture and removal without obstructing the camera view or occupying the working channel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a net is used to retrieve polyps during endoscopic procedures, then the polyp can be captured and removed, but the camera view becomes obstructed and the working channel is occupied during withdrawal

Engineering Contradiction:

Improvepolyp capture reliabilityVSAvoidcamera view obstruction

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The retrieval device is segmented into separate functional components: a capture mechanism (net or basket) and a delivery system (sheath and catheter). This allows the capture device to be deployed through the working channel, perform its function, and then be withdrawn separately without blocking the camera view or occupying the working channel during endoscope removal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The capture device (net or basket) is nested within a delivery sheath that passes through the endoscope's working channel. The sheath itself is inserted through the endoscope, creating a nested configuration. This allows the capture device to be delivered through the working channel without obstructing the camera, and the entire assembly can be withdrawn together or the capture device can be released and withdrawn separately through its own lumen.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If a net is used to retrieve polyps, then the polyp can be removed, but the working channel is occupied and cannot be used for other purposes during withdrawal

Engineering Contradiction:

Improvepolyp capture reliabilityVSAvoidworking channel availability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The device transitions from a constrained state (nested within the sheath during delivery) to an deployed state (capture device expanded and functional at the distal end). The sheath can be withdrawn while the capture device remains deployed and functional, or the capture device can be released and withdrawn through its own lumen, providing dynamic adaptability during the procedure.

Inventive Principle:

Principle #15Dynamics

3Reliability

If the endoscope is re-inserted to remove additional polyps, then all polyps can be removed, but procedural time increases and patient stress increases

Engineering Contradiction:

Improvecomplete polyp removalVSAvoidprocedural time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The retrieval device is designed with universal applicability to capture multiple types of tissue (polyps, foreign objects, stones) through a single working channel. The device can be deployed, used to capture tissue, withdrawn, and potentially redeployed or replaced with another identical device without requiring endoscope reinsertion, enabling multiple captures during a single endoscopic procedure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The device enables continuous useful action by allowing the working channel to remain available for additional polyp captures during the same endoscopic procedure. After one polyp is captured and removed, the working channel can immediately be used again for another capture without interrupting the endoscope's position or requiring reinsertion, maintaining continuous procedural efficiency.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS12402903B2Medical retrieval systems, devices, and related methods

Publication Date: 2025.09.02 BOSTON SCIENTIFIC SCIMED INC

AI summary

In one example, a retrieval device may include a flexible loop; a net coupled to the loop, the net having an opening at least partially circumscribed by the loop; a sheath extending from a proximal end to a distal end; a cord extending through and/or around the net; and a connector assembly movable from a first configuration to a second configuration. In the first configuration, the flexible loop, the net, and the cord may be coupled to the sheath, and in the second configuration, the flexible loop, the net, and the cord may be detached from the sheath.