Integrated Cannula Syringe Hub for Needleless Vial Access
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Solution Overview
Problem
Current medical syringe designs require multiple needle hubs for injection procedures, compromising sterility, increasing the risk of needle sticks, and being cumbersome and expensive due to the need for separate draw and injection needles.
Innovation Solution
A syringe assembly with an integrated cannula that eliminates the need for large-bore draw needles by providing needleless access to medicine delivery points, featuring a receiving collar for attachment hubs and a spiked tip for penetrating seals, allowing for direct fluid communication and compatibility with standard needle hubs through an adapter hub.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple needle hubs (draw needle hub and injection needle hub) are used to complete an injection procedure, then the syringe can perform both drawing and injection functions, but the procedure becomes cumbersome, compromises sterility, and increases the risk of needle sticks
Solution Approach 1:
The patent merges the draw needle hub and injection needle hub into a single integrated hub assembly. The draw needle and injection needle are both attached to the same hub, eliminating the need to remove and replace hubs during the procedure. This integration maintains functional versatility while significantly reducing procedure complexity and improving sterility by eliminating multiple handling steps.
Solution Approach 2:
The integrated hub assembly serves multiple functions: it accommodates both a draw needle for filling the syringe and an injection needle for administering the medication. The hub is designed with a universal interface that can receive either needle type, allowing a single component to perform what previously required two separate components.
2Ease of operation
If a draw needle hub is removed and replaced with an injection needle hub, then the syringe can be used for injection, but sterility is compromised and the technician is exposed to needle stick risks
Solution Approach 1:
By combining both needles on a single hub, the design eliminates the removal and replacement steps that compromise sterility. The hub remains on the syringe throughout the entire procedure, reducing the number of times the connection point is exposed to non-sterile environments.
3Adaptability or versatility
If separate draw needle and injection needle hubs are used, then the syringe can perform multiple functions, but the cost increases due to disposable nature
Solution Approach 1:
The integrated hub assembly reduces the number of disposable components from two separate hubs to one combined hub. This decreases the quantity of waste material and reduces the overall cost of the disposable syringe assembly while maintaining the ability to perform both drawing and injection functions.
4Adaptability or versatility
If a standard Luer-lock fitting is used on the syringe, then compatibility with standard needle hubs is achieved, but the integrated cannula design requires a specialized receiving collar
Solution Approach 1:
The receiving collar is designed to accommodate both standard Luer-lock needle hubs and the integrated cannula system. This universal interface allows the syringe to maintain compatibility with existing standard equipment while incorporating the innovative integrated cannula design, bridging the gap between legacy and new systems.
Data Source
AI summary
A syringe assembly includes a tubular barrel having an open proximal end, a distal end, and an internal a fluid retaining chamber. A plunger is slidingly received in the chamber and is configured to draw fluid into and expel fluid from the chamber. A hollow projection extends from the distal end of the barrel and a cannula extends from the hollow projection. The cannula may have a spiked tip, a transverse orifice, and longitudinally disposed bi-lateral fluid flow channels. The cannula is adapted to penetrate the seal of a medical access point, such as a medicine vial, IV port, or catheter port. A receiving collar including one or more male threads surrounds the hollow projection and the cannula and is adapted to releasably engage a needle hub. The needle hub has an internal cavity configured to matingly receive and cover the cannula.