Medical Retrieval Basket Wire Crimp Joint
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Solution Overview
Problem
Current medical retrieval devices for stones and calculi often rely on costly and labor-intensive manufacturing methods, such as glue joints, which can be unreliable and difficult to control in terms of quality and repeatability.
Innovation Solution
A medical retrieval device featuring an elongated member with a crimp joint and a secondary joint, where the wires forming the basket are secured using crimping, welding, soldering, or gluing, allowing for more cost-effective and reliable construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glue joints are used to secure the basket formation, then the device can be manufactured with simple assembly, but the manufacturing cost increases and quality control becomes difficult
Solution Approach 1:
The patent replaces the chemical bonding mechanism (glue joints) with a mechanical bonding mechanism (crimp joints). The crimp joint uses a crimping tool to mechanically deform and secure the basket wires to the elongated member, providing reliable attachment without the variability and cost associated with adhesive applications.
2Ease of manufacture
If glue joints are used to secure the basket formation, then the assembly process remains simple, but the manufacturing labor cost increases
Solution Approach 1:
The patent replaces the chemical bonding mechanism (glue joints) with a mechanical bonding mechanism (crimp joints). The crimp joint uses a crimping tool to mechanically deform and secure the basket wires to the elongated member, providing reliable attachment without the variability and cost associated with adhesive applications.
3Reliability
If multiple securement joints are used to attach wires to the elongated member, then the connection reliability improves, but the device complexity increases
Solution Approach 1:
The patent divides the securement function into two distinct joints: a first crimp joint that provides primary mechanical attachment, and a second joint (welding, soldering, or additional crimping) that provides secondary reinforcement. This segmentation of the securement function into multiple simpler stages achieves higher reliability without requiring a single complex securement mechanism.
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 solution enables the production of a medical retrieval device that is both cost-effective and reliable, with secure wire connections ensuring effective stone capture and removal from organs and passages, while offering flexibility and durability.
Implementation Method 1
The elongated member and the first and second wires are secured by a crimp joint and a second joint
Implementation Method 2
such joints can be secured by a cannula, welding, and/or soldering in addition to and/or instead of crimping
Implementation Method 3
such joints can be secured by a cannula, welding, and/or soldering in addition to and/or instead of crimping
Data Source
Figure 1
Figure 2~3
Figure 4A~4D
AI summary
A medical retrieval device for retrieving stones, calculi, and the like from various organs and passages may comprising an elongated member, and a first wire and a second wire that forms a retrieval basket. The wires forming the basket and the elongated member may be secured by a crimp joint and a second joint. Processing of the device may include placing all ends of the first wire and the second wire into an elongated member through a distal end of the elongated member, moving said elongated member to a position where the first loop and the second loop start their curvatures, placing said first and second wires and said elongated member through a crimping fixture having thru cuts configured for the interlocked wires, aligning said elongated member in a desired position, and crimping said first and second wires and said elongated member.