Coaxial Syringe Kit for Precise Sequential Injection
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Solution Overview
Problem
Existing methods for injecting or inserting substances into the same site in the human body require great precision and dexterity, especially when the area is small, and there is a need for a device or kit that can facilitate these operations in a safer, easier, and more cost-effective manner.
Innovation Solution
A kit comprising a first syringe element and a second syringe element, where the second syringe can be partially housed in the first, allowing the second needle to penetrate and ensure precise injection at the same site as the first, using a coaxial design with a plunger and connection elements like Luer locks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate injection procedures are used for multiple substances, then each substance can be injected independently, but the precision of injection site accuracy deteriorates due to the need for repeated positioning
Solution Approach 1:
The patent employs a nested syringe configuration where a second syringe containing a second substance is positioned inside or adjacent to a first syringe containing a first substance. Both syringes share a common needle pathway, allowing sequential injection of different substances through the same needle into the same injection site without requiring repositioning. This nested arrangement ensures precise site accuracy while maintaining relatively simple device structure.
Solution Approach 2:
The patent merges multiple injection functions into a single integrated device. The first and second syringes are combined with a shared needle system, allowing both substances to be injected through the same needle at the same injection site. This consolidation eliminates the need for separate positioning operations and reduces procedural complexity while maintaining high precision.
2Productivity
If multiple separate injections are performed, then different substances can be administered, but the time required for the procedure increases due to repeated positioning and setup
Solution Approach 1:
The nested syringe configuration allows both substances to be ready for injection simultaneously, with the second syringe positioned inside or adjacent to the first. This arrangement eliminates the need to reposition the needle or re-establish the injection site between injections, significantly reducing procedure time while maintaining high injection efficiency.
Solution Approach 2:
The patent prepares both syringes in advance with their respective substances loaded and positioned. The second syringe is pre-positioned inside or adjacent to the first syringe before the injection procedure begins. This preliminary preparation ensures that both substances are ready for immediate sequential injection without delays for setup or repositioning.
3Ease of operation
If a simple injection device is used, then the device is easy to operate, but the ability to ensure precise repeated injection at the same site deteriorates
Solution Approach 1:
The nested syringe design maintains ease of operation by using a straightforward configuration where the second syringe is simply positioned inside or adjacent to the first. The operator manipulates both syringes through intuitive plunger actions. The precision is achieved through the shared needle pathway and coaxial alignment, which automatically ensure consistent injection site delivery without requiring complex positioning mechanisms.
Solution Approach 2:
The patent employs asymmetric positioning of the second syringe relative to the first, with the second syringe offset radially or positioned in a specific orientation. This asymmetric arrangement allows both syringes to be manipulated independently while maintaining coaxial needle alignment, providing both ease of operation and precise injection site consistency through the asymmetric but controlled geometry.
Data Source
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AI summary
A kit (10, 100) for subsequent injection and/or subsequent insertion of at least one medical substance in the fluid or liquid state and/or of at least one element (30) in a human body injection or insertion site comprising a first syringe element (12, 112) and at least one second syringe element (14, 114), wherein the first syringe element (12, 112) comprises an internally hollow cylindrical body (13, 113), a plunger (15, 115) and a first needle (16, 116), wherein the plunger (15, 115) is suitable in use to slide inside the cylindrical body (13, 113) in use, wherein the at least one second syringe element (14, 114) comprises a piston (18, 118) and a second needle (19, 119) wherein at least one medical substance is inserted into the cylindrical body (13, 113), wherein the first syringe element (12, 112) is suitable to house- at least partially therein - the at least one second syringe element (14, 114) in use or in any case the second needle (19, 119) is suitable to pass through the plunger (15, 115) in use.