Joint Member for Seamless Medical Device Flow Path
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Solution Overview
Problem
Existing medical devices for administering therapeutic substances, such as intravascular embolization substances, face issues with dead space generation due to dimensional differences between syringe and catheter hub components, leading to incomplete delivery and increased substance concentration, and lack versatility for use with different diameters and lengths.
Innovation Solution
A medical device with a joint member that includes an inner tapered portion for connecting to a male luer tapered portion and an outer tapered portion for connecting to a female luer tapered portion, allowing for a seamless flow path without dead space formation, and can be applied to existing devices, ensuring accurate substance delivery and high versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If luer taper connection is used to connect syringe and catheter hub, then the connection is simple and standard, but a dead space is generated due to dimensional differences between components
Solution Approach 1:
A joint member is introduced as an intermediary component between the syringe and catheter hub. The joint member includes an inner tapered portion that fits into the syringe's male luer tapered portion and an outer tapered portion that fits into the catheter hub's female luer tapered portion. This intermediary structure eliminates the dead space by creating a seamless transition in the flow path while maintaining the simplicity of luer taper connection.
2Adaptability or versatility
If the syringe end face is positioned away from the catheter hub inner surface, then the connection is standardized, but an annular dead space is formed lateral to the flow channel
Solution Approach 1:
The joint member extends the flow path in the axial direction by positioning the inner end portion of the opening at the side of the connected member along the tapered surface of the inner tapered connecting portion. This dimensional arrangement ensures that the flow channel continues smoothly without forming annular dead spaces, while maintaining standardized luer taper connection interfaces.
3Manufacturing precision
If a tapered structure is used to eliminate dead space, then therapeutic substance delivery is improved, but the device cannot be used with different diameters and lengths
Solution Approach 1:
The joint member is designed with both inner and outer tapered portions that conform to standard luer taper dimensions, making it universally compatible with various syringes and catheter hubs of different diameters and lengths. The standardized tapered interfaces allow the same joint member to eliminate dead space across different device configurations without requiring custom designs.
Data Source
AI summary
A medical device which absorbs a difference in dimension between the members, can be applied to an existing device without generating a dead space in a flow path of a therapeutic substance when administrating the therapeutic substance, and is high in versatility. The medical device includes a feeding member, a connected member and a joint member, and the joint member includes an inner tapered portion and an outer tapered portion, the joint member is configured so that the tip end of the joint member is located on the inner tapered connecting portion when the joint member is connected to the hub.