Needle Structure With Partitioning Member For Blood Backflow Monitoring
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Solution Overview
Problem
Conventional needle structures for injecting fillers, such as hyaluronic acid, into the skin lack the ability to confirm whether a blood vessel is present, leading to potential serious side effects like skin necrosis, blindness, or stroke, as high viscosity fillers can prevent blood backflow observation and increase the risk of injecting into blood vessels.
Innovation Solution
A needle structure with a partitioning member that separates the needle housing chamber into two independent chambers, allowing for simultaneous filler injection and blood backflow monitoring, utilizing capillary phenomenon and blood pressure to confirm vessel insertion without aspiration, ensuring safe injection by maintaining atmospheric pressure and preventing filler entry into the second chamber during injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high viscosity filler is used to occupy the needle chamber, then the filler can be effectively injected into subcutaneous tissue, but the blood backflow situation cannot be observed during aspiration
Solution Approach 1:
The needle chamber is divided into two separate chambers: a first chamber for containing the filler and a second chamber for observing blood backflow. The partitioning member creates this segmentation, allowing the high viscosity filler to occupy the first chamber while the second chamber remains clear for aspiration observation, thus resolving the contradiction between filler occupation and blood backflow visibility
Solution Approach 2:
The observation function for blood backflow is extracted from the filler-containing chamber and placed into a separate second chamber. This extraction allows the filler to fully occupy the first chamber without interfering with the blood backflow observation capability in the second chamber
2Device complexity
If conventional single-chamber needle structure is used, then the structure is simple, but the ability to confirm blood vessel presence is lost
Solution Approach 1:
The needle structure is segmented into two functional chambers: the first chamber for filler storage and injection, and the second chamber for blood backflow observation. This segmentation maintains relatively simple construction while enabling reliable blood vessel confirmation through the dedicated observation chamber
Solution Approach 2:
The needle structure is designed with multi-functionality: the first chamber serves for filler containment and injection, while the second chamber serves for blood backflow observation. This multi-functional design enhances reliability by enabling both filler injection and blood vessel confirmation within a single integrated needle structure
3Reliability
If aspiration is performed to confirm blood backflow, then blood vessel presence can be detected, but high viscosity filler prevents blood reflux through the needle
Solution Approach 1:
By segmenting the needle chamber into two separate chambers with a partitioning member, the system allows the high viscosity filler to occupy the first chamber while keeping the second chamber free for blood backflow observation during aspiration, thus enabling reliable blood vessel detection despite the filler's high viscosity
Solution Approach 2:
The blood backflow observation function is extracted into a separate second chamber that does not contain the high viscosity filler. This extraction eliminates the blocking effect of the filler on blood reflux, allowing aspiration to effectively detect blood vessel presence
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances surgical safety by confirming blood vessel insertion without aspiration, preventing filler entry into blood vessels, reducing the risk of complications, and allowing for repeated use of the needle structure, thus improving the safety and efficiency of filler injections.
Implementation Method 1
utilizing capillary phenomenon and blood pressure to confirm vessel insertion
Implementation Method 2
utilizing capillary phenomenon and blood pressure to confirm vessel insertion
Data Source
AI summary
A needle structure for injecting a filler and monitoring a blood backflow situation simultaneously includes a needle, a housing and a partitioning member. The needle includes a needle chamber and a needle opening connected to the needle chamber. The housing includes a housing chamber and a housing opening connected to the housing chamber, and the housing chamber is connected to the needle chamber to form a needle housing chamber. The partitioning member is disposed in the needle housing chamber. The needle housing chamber is separated into a first chamber and a second chamber by the partitioning member. The needle opening is separated into an injection opening and a blood backflow opening by the partitioning member. The first chamber is connected to the injection opening, and the blood backflow opening and the housing opening are connected by the second chamber.