Bendable Connection Member for Medical Basket Insertion
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Solution Overview
Problem
Existing medical devices for vascular lesions, such as aneurysms, have limited openings for inserting medical long objects, making it difficult to insert them into the device, and the size of the device itself becomes large to accommodate easy insertion.
Innovation Solution
A medical device comprising a basket with a connection member that can bend due to the weight of the basket, allowing an angle of 150 degrees or less between the basket pusher and the basket, and an expandable design that includes an outer tube for easy insertion and detachment of the basket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the opening size is increased to allow easy insertion of medical long objects, then the ease of operation is improved, but the device complexity and size increase
Solution Approach 1:
The connection member is designed to dynamically change its configuration from a constrained delivery state to an expanded operational state. During delivery, the connection member is compressed within the outer tube, presenting a small profile. Upon deployment, it expands to form a large opening for inserting medical long objects, thus achieving both small device size during delivery and large opening for easy insertion during operation.
Solution Approach 2:
The basket and connection member are nested within the outer tube during delivery, creating a compact structure. The basket itself is formed by interconnected wires that can be nested within each other, allowing the entire assembly to be delivered through small catheters while maintaining the capability to expand to a large operational size for easy insertion of medical long objects.
2Strength
If the basket is made more rigid to maintain structural integrity, then the strength is improved, but the ease of operation during insertion is worsened
Solution Approach 1:
The connection member exhibits dynamic mechanical properties, transitioning from a flexible, compressible state during delivery to a rigid, structurally intact state during operation. The interwoven wire structure allows compression and bending during insertion while maintaining overall structural integrity, and upon expansion, provides the necessary strength to support the basket and facilitate easy insertion of medical long objects.
Solution Approach 2:
The connection member is constructed from thin, flexible wires that are interwoven to form a basket structure. These thin wires can bend and compress during delivery through the catheter, yet when expanded, they form a structurally intact basket with sufficient strength to maintain its shape and provide a large opening for insertion of medical long objects.
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 device enables easy insertion of medical long objects, such as coils, into the basket by orienting the side portion towards the opening of the bulge, facilitating thrombosis and minimizing invasiveness.
Implementation Method 1
a connection member (80) capable of bending due to a weight of the basket (30)
Data Source
AI summary
A medical device comprising: a basket; a connection member disposed on a proximal side with respect to the basket; and a basket pusher disposed on the proximal side with respect to the connection member, wherein the connection member is configured to be bendable such that in a state where, a 0.1 g weight is connected, in 37° C. warm water, on a distal side with respect to a middle point of a length from the distal end of the basket to the proximal end of the basket, an angle on the proximal side between the extending direction of the basket pusher in a state where the basket pusher is horizontally fixed and the straight line passing through the distal end of the basket and the proximal end of the basket is 150 degrees or less.