Linear Sliding Assist Device for Intravascular Delivery
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Solution Overview
Problem
The deployment and recapture of mechanical intravascular treatment devices, such as braided flow diverters, require complex and unnatural hand manipulations, leading to difficulties in achieving precise positioning and sufficient force, especially in tortuous vessels, which can be challenging for interventionalists to perform ergonomically and accurately without assistance.
Innovation Solution
A system featuring a linear sliding mechanism with a tension device and securing hub allows for controlled movement of delivery wires and microcatheters, enabling ergonomic and natural motion during device deployment and recapture, providing additional force when needed, by securing the devices in a state that allows for independent linear movement without direct grasping of the wire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If complex hand manipulation is used to deploy and recapture the mechanical intravascular treatment device, then the device can be positioned and deployed, but the operation becomes unnatural, uncomfortable, and difficult to perform with refined control
Solution Approach 1:
The patent introduces an assist device with a linear sliding mechanism that acts as an intermediary between the interventionalist's hand and the delivery system components. The assist device includes a hub with a linear sliding mechanism that can be secured to the guide catheter, microcatheter, or delivery wire, allowing the interventionalist to manipulate the device through a natural gripping motion rather than complex coordinated hand movements. This intermediary mechanism translates simple linear sliding motion into the complex coordinated movements required for deployment and recapture.
2Force
If high forces are applied to counter friction during deployment and recapture through tortuous pathways, then the device can be navigated, but the operation becomes more difficult and may require an assistant
Solution Approach 1:
The assist device serves as a mechanical intermediary that provides force multiplication and mechanical advantage. The linear sliding mechanism within the hub can be manipulated to apply controlled forces to the delivery wire or microcatheter, reducing the direct manual force required from the interventionalist. This allows a single operator to manage the forces required for navigating tortuous pathways without requiring an assistant.
3Ease of operation
If coordinated push-pull hand manipulation is used to deploy the self-expanding mechanical intravascular treatment device, then the device can be unsheathed and deployed, but the manipulation becomes unnatural and uncomfortable
Solution Approach 1:
The assist device with linear sliding mechanism mediates between the interventionalist's natural gripping motion and the complex coordinated push-pull manipulation required for deployment. The interventionalist simply grips and slides the hub linearly, and the mechanism internally coordinates the push and pull actions on the delivery wire and microcatheter, converting a natural single-degree-of-freedom motion into the required multi-degree-of-freedom coordinated manipulation.
Solution Approach 2:
The patent replaces the complex manual coordinated push-pull mechanical manipulation with a mechanical system embodied in the assist device. The linear sliding mechanism internally manages the coordination of forces and movements, substituting the interventionalist's direct manual coordination with an automated mechanical coordination system that performs the complex movements based on simple linear input.
Data Source
AI summary
A system to assist delivery of a mechanical intravascular treatment device, wherein the system includes a first assist device having a first linear sliding mechanism. The linear sliding mechanism includes: a first non-slidable section; a first slidable section linearly displaceable relative to the first non-slidable section; and a first tension device connected to the first slidable section to move together; the first tension device being transitionable between an unsecured state and a secured state. A first securing hub is fixedly attached to the first non-slidable section, wherein the first securing hub is transitionable between an unsecured state and a secured state. The system may also include a second assist device. The assist devices provide enhanced control of movement of the delivery wire and/or guide catheter.