Living Cell Collection Needle with Tapered Tip and Inner Tube
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Solution Overview
Problem
Conventional ovum collection needles do not efficiently inject collection auxiliary liquids into the ovary and cause pain during the ovum collection operation, making the process difficult for both the subject and the operator.
Innovation Solution
A living cell collection needle with a hollow needle having a small-diameter front end, a tapered part, and a piercing cutting edge, along with an inner tube and auxiliary liquid supply system, designed to reduce pain and ease the injection of collection auxiliary liquids into the ovary, allowing for efficient oocyte or ovum collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional hollow needle is used for ovum collection, then the structure is simple, but the pain given to the subject is increased and the injection of collection auxiliary liquid is difficult
Solution Approach 1:
The needle is divided into multiple functional segments: a hollow needle for insertion, an inner tube for liquid injection, and a side tube for auxiliary liquid supply. This segmentation allows each component to perform its specific function efficiently, reducing overall pain and improving操作 ease without excessive complexity
Solution Approach 2:
The inner tube is nested inside the hollow needle, with the inner tube's front end positioned inside the tapered part or front end portion of the hollow needle. This nested configuration allows the injection needle to be inserted through the hollow needle, enabling liquid injection while maintaining a relatively simple overall structure
2Productivity
If a conventional needle design is used, then the manufacturing is simple, but the injection of collection auxiliary liquid into the ovary is inefficient
Solution Approach 1:
The hollow needle serves multiple functions: it acts as both the insertion pathway and the injection channel for collection auxiliary liquid. The side tube provides an additional pathway for auxiliary liquid supply. This multi-functionality improves injection efficiency without requiring completely separate systems
Solution Approach 2:
The collection auxiliary liquid is pre-loaded into the inner tube before the procedure. When the needle is inserted into the ovary, the liquid is already in position and can be injected immediately through the inner tube, eliminating the need for separate liquid loading steps and improving injection efficiency
3Object-affected harmful factors
If a standard needle diameter is used, then the manufacturing is easier, but the resistance during insertion into the ovary is increased
Solution Approach 1:
The needle features a tapered part with gradually decreasing outer and inner diameters toward the front end, creating a local quality variation. This tapered geometry reduces insertion resistance at the leading edge while maintaining sufficient diameter in the body portion for structural integrity and liquid flow, balancing manufacturing ease with reduced insertion resistance
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
The needle design reduces pain and resistance during ovum collection, enabling easy insertion and efficient collection of oocytes or ova by minimizing the tapered part's piercing and maximizing the small-diameter front end's penetration, while allowing for secure injection and collection of auxiliary liquids.
Implementation Method 1
a tapered part positioned between the hollow small-diameter front end part and the hollow body part and decreasing toward the hollow small-diameter front end part in outer and inner diameters thereof
Implementation Method 2
a collection auxiliary liquid supply tube connected to the side tube
Implementation Method 3
a living cell sucking tube connected to a rear end portion of the inner tube
Data Source
AI summary
A living cell collection needle has a hollow needle having a hollow body part, a hollow small-diameter front end part, a tapered part between the front end part and the hollow body part and decreasing in inner and outer diameters toward the front end of the needle, and a piercing cutting edge part at a front end of the small-diameter front end part; a hub fixed to a rear end portion of the hollow body part; an inner tube inside the hollow needle and a living cell sucking tube connected to a rear end portion of the inner tube. A rear end of the hollow needle is positioned inside the hub. The needle has a side tube with a front end portion inside the hub and communicating with the inside of the hollow needle and a rear end portion projecting rearward from the hub and liquid-tightly fixed to the hub.