Bio Paracentesis Needle Structure for Shallow Wrinkle Insertion
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Solution Overview
Problem
Conventional paracentesis needles for plastic surgery are unable to be inserted shallowly along skin wrinkles, limiting their application in procedures such as injecting sutures into the skin.
Innovation Solution
A bio paracentesis needle design featuring a tube-shaped body with a hollow portion, an insertion portion with inclined edges for cutting and inserting, and a removal cut for waste, allowing for shallow insertion and minimizing tissue disruption, along with a manufacturing method that forms these features through specific cutting and rounding steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional paracentesis needles are designed for deep insertion, then they can reach deep target tissues, but they cannot be inserted shallowly along skin wrinkles
Solution Approach 1:
The needle body is divided into distinct functional segments: a sharp insertion portion with blade-shaped edges for penetrating skin, a mid-section with removal cuts for waste ejection, and a hollow body for suture passage. This segmentation allows each portion to be optimized for its specific function, enabling both deep and shallow insertion capabilities
Solution Approach 2:
Different portions of the needle have different structural properties: the insertion portion has sharp blade-shaped edges for cutting skin, while the removal cut portions have open structures for waste ejection. This local differentiation enables the needle to perform multiple functions including shallow insertion along skin wrinkles and deep tissue access
2Strength
If the needle body is solid for strength, then it maintains structural integrity, but it cannot allow suture passage or waste removal
Solution Approach 1:
The needle body incorporates removal cuts that create porous/open structures along the needle wall. These cuts allow waste materials to be ejected laterally from the hollow body during insertion, preventing waste accumulation while maintaining the overall structural integrity of the needle through the tube-shaped body design
3Ease of operation
If the insertion portion has a sharp blade edge for cutting skin, then insertion is facilitated, but tissue disruption increases
Solution Approach 1:
Instead of using a conventional sharp point that penetrates by pushing tissue aside, the insertion portion uses blade-shaped edges that cut through skin in a controlled manner. The diagonal surfaces of the blade edges allow for precise cutting action that minimizes unnecessary tissue disruption and reduces scarring while maintaining insertion effectiveness
Data Source
AI summary
A bio paracentesis needle includes a tube-shaped body having a hollow portion through which a suture is inserted, an insertion portion formed at an end of the body to cut skin and insert the body, and at least one removal cut to an inside of the body to remove waste under the skin when the body is inserted. The insertion portion includes a first inclined edge having a diagonal surface inclined downward in a direction from a first end of the both to the hollow portion, a second inclined edge having a diagonal surface inclined upward from a second end of the body to the first inclined edge, the second end being positioned opposite the first end, and a third inclined edge has a diagonal surface inclined downward in a direction from an end of the first inclined edge to the second inclined edge.