Detachable Treatment Device Delivery System Compression Attachment

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Solution Overview

Problem

Current medical treatment device deployment systems lack control, reliability, and simplicity, particularly when navigating tortuous anatomy, and there is a need for improved systems that can efficiently deliver and detach treatment devices like embolization coils in vascular procedures.

Innovation Solution

A detachable treatment device delivery system featuring a delivery sheath with a lumen and a deployment wire, where the overlap of the deployment wire and the treatment device's proximal attachment segment is compressed within an attachment zone, allowing for controlled detachment and navigation through complex anatomical structures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a treatment device is delivered through a delivery system, then the treatment device can be deployed at the target site, but the system lacks control and reliability when navigating tortuous anatomy

Engineering Contradiction:

Improvecontrol and reliabilityVSAvoidnavigation through tortuous anatomy

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The delivery system is divided into distinct functional segments: a delivery catheter for navigation, a deployment wire for positioning, and a treatment device for therapy delivery. This segmentation allows each component to be optimized for its specific function, improving overall control and reliability while maintaining ease of navigation through complex anatomy

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A deployment wire acts as an intermediary element between the delivery catheter and the treatment device. The wire provides a mechanical bridge that enables controlled deployment and positioning of the treatment device at the target site, enhancing system reliability during navigation and deployment

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the deployment wire and treatment device overlap within the delivery sheath, then controlled detachment is achieved, but the attachment zone requires compression to maintain positioning

Engineering Contradiction:

Improvecontrolled detachmentVSAvoidcompression force at attachment zone

Core Design Contradiction:

ReliabilityVSForce

Solution Approach 1:

The attachment zone transitions from a compressed state during delivery to an expanded state during deployment. The delivery sheath dynamically changes its configuration, applying compression during navigation to maintain positioning, then releasing to allow controlled detachment at the target site

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The physical parameters of the attachment zone are changed during the deployment process. The compression force and sheath diameter are modified to transition from a retained configuration to a deployed configuration, enabling controlled detachment while maintaining positioning during delivery

Inventive Principle:

Principle #35Parameter changes

3Measurement precision

If the treatment device is retained in the delivery system during navigation, then positioning control is maintained, but the device cannot be released at the target site

Engineering Contradiction:

Improvepositioning controlVSAvoidrelease at target site

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The delivery system is pre-configured with the treatment device and deployment wire in a retained configuration during navigation. This preliminary arrangement maintains positioning control, and then a detachment mechanism is activated at the target site to enable release, combining precise positioning with easy deployment

Inventive Principle:

Principle #10Preliminary action

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 system provides reliable and controlled deployment and detachment of treatment devices, enabling effective navigation through tortuous anatomy and ensuring consistent delivery of medical devices like embolization coils.

Implementation Method 1

compressing an overlap of a distal segment of the deployment wire and a proximal attachment segment of the treatment device within an attachment zone defined by the delivery sheath

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 2

An inner surface of the delivery sheath is outwardly expanded at the overlap responsive to the compressing step

Methodology Applied

Scientific EffectElastic expansion: Elasticity

Data Source

PatentUS9662120B2Detachable treatment device delivery system utilizing compression at attachment zone

Publication Date: 2017.05.30 COOK MEDICAL TECHNOLOGIES LLC

AI summary

A detachable treatment device delivery system includes a delivery sheath defining a lumen, a treatment device having a proximal attachment segment configured for receipt within the delivery sheath, and a deployment wire configured for receipt within the delivery sheath. A delivery configuration is defined by an overlap of a distal segment of the deployment wire and the proximal attachment segment within an attachment zone of the delivery sheath. In the delivery configuration, an inner surface of the delivery sheath is outwardly expanded and compressed around the deployment wire and the treatment device at the overlap. In a deployed configuration, the deployment wire is proximally spaced from the attachment zone, and the proximal attachment segment is distally spaced from the attachment zone and the distal opening.