Multi-Chamber Injection System with Fluid Conveying Assembly
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Solution Overview
Problem
Current injection systems face challenges in providing precise control and safe handling of multi-component injectables, with issues such as incomplete mixing, user exposure to needles, and inefficiencies in transferring liquids between containers, leading to potential errors and increased risk of needle stick injuries.
Innovation Solution
A multiple chamber injection system with a fluid conveying assembly that includes a penetrating member and a transfer member, allowing for precise control and safe handling by dilating the distal stopper member to form a fluid passage between chambers, and featuring an anti-retraction mechanism to prevent accidental needle exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional syringe with needle is used for injection, then injection function is achieved, but user exposure to needle and risk of needle stick injury occurs
Solution Approach 1:
The injection system is divided into separate components: a syringe body with fluid reservoir, a separate needle assembly, and a protective shield. The needle can be attached only when needed and is protected by a shield that covers it during storage and transport, preventing accidental sticks while allowing controlled access for injection.
Solution Approach 2:
A protective shield acts as an intermediary barrier between the user and the needle. The shield physically interposes itself between potential contact points, blocking accidental needle exposure while still permitting controlled needle access when properly positioned for injection.
2Manufacturing precision
If manual transfer of liquid between containers is performed, then injection preparation is achieved, but incomplete mixing and potential errors occur
Solution Approach 1:
Multiple fluid reservoirs containing different components are merged into a single integrated syringe body. The system combines separate medication containers with their respective stoppers and sealing membranes into one unified device, ensuring complete mixing when plunger activation forces fluids together through controlled interaction.
Solution Approach 2:
The syringe body serves multiple functions: storing multiple fluid components in separate compartments, providing mixing capability through plunger activation, and enabling injection delivery. This multi-functional design eliminates the need for separate transfer operations between multiple containers.
3Adaptability or versatility
If a single chamber syringe is used, then simple structure is maintained, but multi-component mixing capability is lost
Solution Approach 1:
The syringe is segmented into multiple fluid chambers separated by stoppers and sealing membranes. Each chamber can hold a different component, and the segmentation allows independent containment while enabling controlled mixing when plunger activation overcomes the sealing barriers to combine fluids.
Solution Approach 2:
Multiple fluid chambers are nested within the single syringe body structure. Each chamber is contained within the overall syringe housing, with stoppers and membranes nested between chambers. This nesting approach maintains a compact single-device form while accommodating multiple components.
Data Source
AI summary
An injection system includes a syringe body defining a proximal opening at a proximal end thereof and a distal needle interface at a distal end thereof. The system also includes proximal and distal stopper members disposed in the syringe body, forming respective proximal and distal drug chambers. The system further includes a plunger member configured to be manually manipulated to insert the proximal stopper member relative to the syringe body. Moreover, the system includes a fluid conveying assembly including a penetrating member configured to penetrate the distal stopper member to fluidly couple the proximal and distal drug chambers, a distal exit tube, and a transfer member disposed at least partially around a portion of the penetrating member and defining a fluid passage. A distal end of the penetrating member is disposed in the distal exit tube.