Puncture Extension Tube with Luer Connections for Short-Needle Access
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Solution Overview
Problem
Current puncture devices for anatomical cavities, such as those used in sclerotherapy for hemorrhoids, lack a wide field of view and often require thick, long needles that cause discomfort and increase the risk of bowel perforation and surrounding organ involvement.
Innovation Solution
A puncture extension device with a hollow tube and luer cone connector for a hypodermic needle, allowing connection to a small-gauge, short needle, and a threaded luer lock connection for stability, enabling precise and safe punctures within anatomical cavities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If thick, long needles are used for puncture devices, then the device can reach structures within anatomical cavities, but patient discomfort increases and the risk of bowel perforation and surrounding organ involvement increases
Solution Approach 1:
The patent introduces an anoscope as an intermediary device that provides a visual field and working space, allowing the use of shorter, thinner needles to reach hemorrhoidal structures. The anoscope acts as a mediator between the external puncture device and the internal anatomical structures, enabling safe access without requiring long needles that could perforate the bowel wall.
Solution Approach 2:
The invention transitions from a direct linear puncture approach to a multi-dimensional approach by combining the anoscope (providing visual and spatial dimension) with the puncture device. This allows the needle to reach deeper structures through the anoscope's working channel while maintaining a short external profile, effectively adding a spatial dimension to the puncture pathway.
2Length of moving object
If thick, long needles are used for puncture devices, then the device can reach structures within anatomical cavities, but patient discomfort increases
Solution Approach 1:
The anoscope serves as an intermediary that facilitates the use of shorter, thinner needles. By providing a visual field and a protected working channel, the anoscope allows the puncture to be performed with a needle that is less invasive and causes minimal discomfort, while still reaching the target hemorrhoidal structures effectively.
Solution Approach 2:
The invention changes the parameters of the needle (reducing length and gauge) by introducing the anoscope as a facilitating device. This parameter change transforms the needle from a long, thick, potentially painful instrument to a short, thin, minimally uncomfortable device that achieves the same therapeutic goal through the anoscope's working channel.
3Ease of operation
If conventional puncture devices are used, then puncture can be performed, but the field of view is limited
Solution Approach 1:
The patent merges two separate functions into a single integrated system: the anoscope provides both the visual field (illumination and magnification) and the working channel for the puncture device. This combination eliminates the need for separate visualization equipment and simplifies the overall procedure while providing an excellent field of view of the anal canal and hemorrhoidal structures.
Data Source
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Figure 5a~5b
AI summary
The invention refers to an extension device (10) for a puncture device (20) to puncture structures located within an anatomical cavity, where the extension device comprises a hollow tube (1) with a distal end (2) and a proximal end (3); where the distal end (2) comprises a luer cone connector adapted for coupling to a hypodermic needle (4); and the proximal end (3) comprises a threaded luer connection adapted for coupling to a source of sclerosing substance. Likewise, the invention also includes a puncture device (20) and an injection, drainage, and/or sampling system (30) that incorporates this puncture device (20).