Disposable Syringe Assembly Kit for Pre-filled Cartridges
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Solution Overview
Problem
The administration of medicinal products, particularly dental anaesthetics, faces challenges such as cumbersome and contaminated ampoule drawing, risk of injury from syringe racks, discomfort for patients, especially children, and high development and production costs for disposable pre-filled syringes, as well as the risk of cross-infection from multiple use.
Innovation Solution
A disposable pre-filled syringe assembly kit comprising a gripping means, needle mount, and plunger rod, made of plastic, which can be assembled with conventional cartridges to create a cost-efficient, hygienic, and compact injection device, with a protecting sleeve to prevent breakage and reduce cross-infection risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional syringe racks are used with pre-filled cartridges, then the injection device provides structural support and stability, but it creates a scary and threatening effect on patients, especially children, and increases the risk of cross-infection
Solution Approach 1:
The invention divides the injection device into separate functional components: a disposable syringe unit containing the cartridge, needle, and plunger, and a reusable holder for positioning. This segmentation allows the syringe to be discarded after use, eliminating cross-infection risks, while the holder provides structural support without contacting the patient.
Solution Approach 2:
The syringe unit including the cartridge and needle is designed as a disposable component that is discarded after single use. This eliminates the need for cleaning and sterilization of the syringe itself, reducing cross-infection risks while maintaining structural functionality through the reusable holder.
2Reliability
If disposable pre-filled syringes are designed and manufactured, then hygiene and safety are improved, but development and production costs are comparatively high
Solution Approach 1:
The disposable syringe unit is designed to accommodate different cartridge types and medicinal products through universal compatibility features. The standardized interface allows the same syringe design to work with various cartridges, reducing the need for multiple specialized designs and lowering development and production costs.
Solution Approach 2:
The disposable syringe unit is discarded after single use to maintain hygiene, while the reusable holder is recovered and sterilized for continued use. This approach maintains high hygiene standards without requiring disposable holders, significantly reducing overall production costs.
3Quantity of substance
If ampoule or vial drawing is performed, then medicinal product can be obtained, but the process is cumbersome and carries the risk of contamination with microorganisms or particulates
Solution Approach 1:
The cartridge is pre-filled with the medicinal product under controlled conditions before leaving the manufacturing environment. This preliminary action eliminates the need for drawing operations at the point of use, preventing contamination with microorganisms or particulates while maintaining product availability.
Solution Approach 2:
The medicinal product is extracted from the sealed cartridge environment directly into the syringe chamber during the injection process, eliminating the need for separate drawing operations from ampoules or vials. This extraction occurs in a controlled manner that prevents contamination.
4Ease of operation
If needle insertion into multiple dosage container is performed, then medicinal product can be administered, but medical staff is exposed to risk of injury
Solution Approach 1:
The needle is integrated into the disposable syringe unit that is discarded after single use. This eliminates the need for needle reuse and associated injuries to medical staff, while maintaining the ability to administer medicinal products through the disposable needle.
Solution Approach 2:
The disposable syringe unit acts as an intermediary between the cartridge and the patient, containing the needle within a protected structure that is discarded after use. This intermediary design protects medical staff from needle injuries while enabling easy product administration.
Data Source
Figure 1~3
Figure 4~7
AI summary
The present invention relates to an assembly kit for preparing of a pre-filled syringe and in particular to a method of preparing of such pre-filled syringe assemblies by means of an assembly kit, wherein the assembly kit comprises: - a gripping means (20, 21) to be attached to a proximal end section of a cartridge (10) which comprises an axially displaceable bung (12) for sealing of an interior volume of the cartridge (10) being pre-filled with an injectable medicinal product, - a needle mount (18, 19) to be attached to a distal end section of the cartridge (10) and providing a mount for a needle assembly to be coupled to the interior volume of the cartridge (10) in a fluid-transferring way, - a plunger rod (26; 30) connectable with the bung (12) of the cartridge (10) for applying distally directed thrust to the bung (12), wherein the cartridge (10) is at least partially embedded in a protecting sleeve.