Two-Part Hemostasis Clip Arms for Tight Endoscopic Placement

Solution Overview

Problem

Current hemostatic clips are large and difficult to navigate through tight areas, making it challenging to deploy additional clips near injured sites where previous clips have been deployed, especially in endoscopic procedures for gastrointestinal pathologies.

Innovation Solution

A two-part arm design with proximal and distal portions that disengage after deployment, coupled via a cam mechanism, allowing for a smaller capsule size and easier navigation, and a mechanism to lock the distal portions in place while removing the proximal portions from the body.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If current hemostatic clips use a capsule design long enough to contain the full length of tissue gripping arms, then the clips can effectively grasp and hold tissue, but the clips become large and difficult to navigate in tight areas

Engineering Contradiction:

Improvetissue gripping capabilityVSAvoidcapsule length

Core Design Contradiction:

StrengthVSLength of moving object

Solution Approach 1:

The clip arm is divided into two separate parts: a distal part that remains in the body to perform the gripping function, and a proximal part that is removed after deployment. This segmentation allows the capsule to be shorter while still achieving effective tissue grasping through the distal part alone.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The proximal part of the clip arm is extracted or removed from the body after the clip is deployed. Only the essential distal part containing the tissue gripping arms remains in the capsule, reducing the overall capsule length needed while maintaining the tissue holding capability.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If current hemostatic clips use a deployment mechanism that pulls and pushes arms in and out of the capsule, then the clips can open and close effectively, but the clips become large making it difficult to place additional clips near injured areas

Engineering Contradiction:

Improveclip deployment functionalityVSAvoidcapsule length

Core Design Contradiction:

Ease of operationVSLength of moving object

Solution Approach 1:

The proximal part of the clip arm is extracted or removed from the body after the clip is deployed. Only the essential distal part containing the tissue gripping arms remains in the capsule, reducing the overall capsule length needed while maintaining the tissue holding capability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The clip mechanism transitions from a static full-length arm to a dynamic two-part system where the proximal part can be removed. This dynamic configuration allows the capsule to be shorter while still achieving effective tissue grasping through the distal part alone.

Inventive Principle:

Principle #15Dynamics

3Reliability

If multiple clips are deployed to close larger injured areas or address multiple bleeding sites, then better hemostasis is achieved, but the large size of current clips obstructs further procedures in tight spaces

Engineering Contradiction:

Improvehemostasis effectivenessVSAvoidcapsule length

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The clip arm is divided into two separate parts: a distal part that remains in the body to perform the gripping function, and a proximal part that is removed after deployment. This segmentation allows the capsule to be shorter while still achieving effective tissue grasping through the distal part alone.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The proximal part of the clip arm is discarded or removed from the body after the clip has been deployed and is functioning. Only the necessary distal part remains to perform the hemostatic function, reducing obstruction for subsequent procedures while maintaining reliability.

Inventive Principle:

Principle #34Discarding and recovering

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

Enables efficient deployment of hemostatic clips in tight spaces, reducing the size of the device left in the body and facilitating multiple clip placements without obstructing further procedures.

Implementation Method 1

The capsule includes a cam extending into the channel, the cam being sized and shaped to extend through a first longitudinal slot of the proximal part to releasably couple the clip arms to the capsule

Methodology Applied

Scientific EffectCam mechanism: Cam

Data Source

PatentUS12558101B2Hemostasis clip

Publication Date: 2026.02.24 BOSTON SCIENTIFIC SCIMED INC

AI summary

A device for treating tissue includes a capsule defining a channel extending therethrough and clip arms. Each of the arms includes a proximal part releasably coupled to a distal part, a proximal portion of the distal part configured to be received within the channel of the capsule so that the arms move proximally and distally relative to the capsule between a tissue receiving configuration, in which distal ends of the arms are separated from one another, and a tissue clipping configuration, in which distal ends of the arms are moved toward one another. The proximal portion of each of the arms is configured to release from the corresponding distal part to lock the distal part of each of the arms over a portion of target tissue to be clipped while the proximal parts of the arms are removed from the body.