Tissue Collecting Instrument with Segmented Piercing Notch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional biopsy devices face challenges in efficiently collecting tissue samples due to tissue fragments being extruded or not cut off properly, leading to insufficient collection and complex manipulation techniques.
Innovation Solution
A tissue collecting instrument featuring a tubular first member with a side hole and a movable second member, including a piercing portion with inclined surfaces and a cutaway surface design with blade and edge surfaces, allows for effective piercing, cutting, and collection of tissue samples without extrusion, using a first and second protruding portion to facilitate tissue entry and cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a biopsy needle with a cylindrical shape and sharp tip is used to pierce tissue, then the tissue can be pierced and a portion can enter the needle, but the tissue portion is not easy to collect because it remains connected to other tissue parts
Solution Approach 1:
The biopsy needle is divided into an inner needle and an outer needle, with the inner needle having a notch portion that segments the tissue collection process. The inner needle pierces the tissue while the outer needle provides a receiving cavity, allowing the tissue portion to be collected more effectively after piercing.
Solution Approach 2:
The notch portion on the inner needle acts as an intermediary structure between the piercing action and tissue collection. This notch receives the tissue portion that enters during piercing, facilitating the transition from penetration to collection without requiring the tissue to be fully detached.
2Quantity of substance
If the outer needle moves forward relative to the inner needle to collect tissue in the notch portion, then some tissues are cut off from other parts, but some tissues may be extruded to the outside of the inner needle
Solution Approach 1:
The inner needle is advanced forward first to pierce the tissue and form the notch portion configuration before the outer needle moves forward. This preliminary positioning ensures that the tissue is properly captured in the notch before the outer needle's forward motion could cause extrusion, improving collection reliability.
3Object-affected harmful factors
If additional tools are used to prevent foreign substances from entering the internal space, then foreign substance prevention is improved, but the device complexity increases
Solution Approach 1:
The outer needle serves multiple functions: it provides the receiving cavity for tissue collection, acts as a protective barrier to prevent foreign substances from entering the internal space during the procedure, and facilitates the tissue extraction process. This multi-functionality eliminates the need for separate protective tools, maintaining device simplicity.
Data Source
AI summary
A tissue collecting instrument which cuts and collects tissue includes a first member formed in a tubular shape and including an internal space and a side hole communicating with the internal space, a second member inserted into the internal space and configured to be movable relative to the first member, a first protruding portion provided on the first member and configured to protrude toward the inside of the side hole, and a second protruding portion provided on the second member and configured to protrude in a direction opposite to the first protruding portion, wherein the tissue is able to enter the internal space through the side hole when the first member and the second member are in a positional relationship in which the first protruding portion and the second protruding portion are spaced apart and facing each other.