Retractable Needle IV Catheter Hub Design
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Solution Overview
Problem
Current intravenous catheter systems face issues with blood spillage, catheter shearing, poor visibility of the flash chamber, inadequate flexibility, significant dead-space leading to medication delays and clotting, and the inability to integrate with multiple device types, posing risks and complications during administration.
Innovation Solution
A redesigned intravenous catheter system featuring a retractable needle system with a double-barreled housing, anti-shearing mechanism, improved catheter flexibility, reduced dead-space, and integration capabilities with needles, blunts, and needleless devices, including a valve system with fluid channels to minimize blood spillage and enhance administration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional IV catheter system is used, then the procedure is simple, but blood spillage occurs during needle retraction and separation
Solution Approach 1:
The patent combines the needle retraction mechanism and blood containment function into a single integrated hub structure. The hub houses both the needle retraction spring mechanism and a blood collection chamber, merging previously separate functions (needle retraction and blood containment) into one component system, thereby reducing blood spillage without proportionally increasing overall device complexity
Solution Approach 2:
The patent introduces a hub as an intermediary component between the needle and catheter system. This hub serves as a mediator that contains the blood when the needle is retracted, preventing direct contact between spilled blood and the external environment. The hub acts as a buffer zone that captures blood during the separation process
2Ease of operation
If the needle is separated from the catheter, then the catheter can be inserted, but catheter shearing may occur
Solution Approach 1:
The patent implements a preliminary action by designing the hub to automatically retract the needle before the catheter is fully separated. The spring-loaded mechanism预先 (in advance) pulls the needle back into the hub housing, ensuring the needle is safely contained before the catheter detachment occurs, thereby preventing catheter shearing during the separation process
Solution Approach 2:
The hub structure serves as a cushioning mechanism that absorbs the mechanical stress during needle-catheter separation. The spring-loaded retraction system provides a缓冲 (buffer) zone that gradually retracts the needle, preventing sudden movements that could cause catheter shearing or damage
3Illumination intensity
If the flash chamber is made larger for better visibility, then blood detection is improved, but dead-space increases causing medication delays
Solution Approach 1:
The patent utilizes color changes or visual indicators in the flash chamber design to enhance visibility without requiring a large chamber volume. The flash chamber incorporates visual cues (such as color-coded indicators or transparent sections) that allow healthcare providers to quickly detect blood presence in a compact space, thereby maintaining fast medication delivery while improving observability
Solution Approach 2:
The patent optimizes the flash chamber geometry by changing its dimensional configuration. Instead of simply enlarging the chamber volume, the design uses a compact, space-efficient arrangement that maximizes visibility surface area while minimizing internal volume, thereby reducing dead-space and preventing medication delivery delays
4Ease of operation
If the catheter is made more flexible, then patient comfort improves, but catheter strength may be compromised
Solution Approach 1:
The patent employs composite materials in the catheter construction, combining flexible polymers with reinforcing elements. The catheter uses a multi-layer structure where the inner layer provides flexibility for patient comfort, while outer reinforcement layers maintain structural strength and prevent catheter collapse or damage during insertion and use
5Adaptability or versatility
If the IV system is designed for single device compatibility, then manufacturing is simple, but adaptability to different devices is limited
Solution Approach 1:
The patent designs the hub with universal connection features that can accommodate multiple device types (needles, syringes, infusion pumps, etc.). The hub incorporates standardized ports and attachment mechanisms that interface with various IV devices, making the system multi-functional and adaptable without requiring device-specific customization, thereby achieving versatility while controlling complexity through standardization
Data Source
AI summary
An intravenous catheter system having a retractable needle system and a body system is disclosed. The retractable needle system includes a housing, a needle, a docking feature, and an optional anti-shearing mechanism. The body system includes a body, at least one hub, a catheter connector, at least one plug, a plug recoil mechanism, a locking mechanism, a flash chamber, and a flash window.