Stent Delivery System with Image-Guided Insertion Positioning

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Solution Overview

Problem

Conventional stent delivery systems face challenges in accurately positioning stents within stenoses, particularly in asymmetrical or non-uniformly constricted lumens, leading to difficulties in successful stent deployment due to the risk of the stent delivery device getting caught in the stenosis.

Innovation Solution

A stent delivery system that includes a stent delivery device, an observation device, and processors configured to acquire observation images and determine optimal insertion positions within the stenosis, allowing for precise placement of the stent by adjusting the endoscope's position based on the acquired images, thereby avoiding contact with the stenosis wall.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a stent delivery device is inserted into a stenosis to deploy a stent, then the stent can be placed to treat the narrowing, but the delivery device may get caught in the stenosis due to asymmetrical or non-uniform constriction

Engineering Contradiction:

Improvesuccess rate of stent deploymentVSAvoidrisk of device entrapment

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary observation and analysis of the stenosis geometry using observation devices (fluoroscopy, OCT, IVUS) before stent delivery. The processor determines optimal insertion positions and trajectories based on pre-acquired imaging data, allowing the operator to plan the approach and avoid positions that could lead to device entrapment in asymmetrical stenoses

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously acquires observation images during the procedure and the processor provides real-time feedback by determining whether the current device position is appropriate. This feedback loop allows dynamic adjustment of the insertion position to avoid entrapment while ensuring proper stent deployment

Inventive Principle:

Principle #23Feedback

2Manufacturing precision

If the stent delivery device is inserted without precise positioning guidance, then the procedure is simpler and faster, but the stent may be misplaced within the stenosis

Engineering Contradiction:

Improvepositioning accuracy of stentVSAvoidcomplexity of positioning system

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The observation device and processor serve multiple functions: they observe the stenosis geometry, determine optimal insertion positions, guide device placement, and verify stent deployment. This multi-functionality achieves precise positioning without requiring separate specialized devices for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The processor acts as an intermediary that processes observation images and translates them into actionable positioning guidance. Rather than directly manipulating the device, the processor analyzes imaging data and provides position recommendations, simplifying the interface between observation and action

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20230404364A1Stent delivery system and stent delivery method

Publication Date: 2023.12.21 OLYMPUS CORPORATION(JP)

AI summary

A stent delivery system includes: a stent delivery device configured to carry a stent to a stenosis and indwell the stent; an observation device configured to observe the stenosis; and one or more processors comprising hardware, the one or more processors being configured to: acquire an observation image from the observation device, and determine, based on the observation image, at least one insertion position, which is a position within the stenosis where the stent delivery device is recommended to be inserted.