Biopsy Needle Segmented Tip for Fibrous Tissue Sampling
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Solution Overview
Problem
Current biopsy needles are inefficient in collecting tissue samples, often resulting in insufficient or damaged samples due to inadequate tip designs, which can lead to trauma and complications during minimally invasive procedures, especially when dealing with fibrous tissues.
Innovation Solution
A biopsy needle with a distinct distal cutting end featuring first and second tip portions that radially oppose each other, increasing the cutting surface area, allowing for controlled tissue collection and maximizing sample yield by guiding tissue into the lumen with minimal resistance and maintaining a cohesive sample.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional biopsy needle tip designs are used, then the needle can penetrate tissue, but the cutting surface area is insufficient resulting in inadequate tissue collection
Solution Approach 1:
The needle tip is segmented into multiple cutting edges (first cutting edge, second cutting edge, third cutting edge) arranged at different angles and positions. This segmentation increases the total cutting surface area and allows the needle to collect tissue samples more effectively by engaging multiple tissue planes simultaneously.
Solution Approach 2:
The cutting edges are arranged in three-dimensional space at different angular orientations (e.g., 45 degrees, 90 degrees, 135 degrees relative to the longitudinal axis). This spatial arrangement extends the cutting surface area beyond a single plane, enabling comprehensive tissue engagement and sampling.
2Reliability
If conventional needle designs are used, then the procedure is simple, but tissue samples are damaged or torn during collection
Solution Approach 1:
Multiple cutting edges are segmented along the needle tip, each performing a specific function in the tissue sampling sequence. This segmentation allows controlled tissue engagement that maintains sample integrity while managing the complexity through systematic arrangement.
Solution Approach 2:
The first cutting edge performs preliminary tissue engagement and incision before the second and third cutting edges complete the sampling. This preliminary action prepares the tissue for clean extraction, maintaining sample integrity through a staged cutting process.
3Strength
If conventional single cutting edge design is used, then the needle structure is simple, but the needle cannot effectively penetrate fibrous tissues
Solution Approach 1:
The cutting function is segmented across multiple edges positioned at different angles. This segmentation distributes the penetration force across multiple contact points, enabling effective penetration of fibrous tissues that resist single-point incision.
Solution Approach 2:
The cutting edges are arranged in a curved or angled configuration around the needle tip rather than a single straight edge. This curved arrangement allows the needle to engage fibrous tissue from multiple angles, improving penetration capability through distributed force application.
4Quantity of substance
If conventional beveled tip design is used, then manufacturing is simple, but the needle collects insufficient tissue samples
Solution Approach 1:
The tip is segmented into multiple cutting edges that can be manufactured through sequential grinding or forming operations. While more complex than a single bevel, the segmented design achieves superior tissue sampling volume through systematic multi-edge configuration.
Solution Approach 2:
The cutting edge parameters (angles, positions, orientations) are optimized to maximize tissue engagement. By adjusting these parameters, the needle collects sufficient tissue samples while the manufacturing process adapts to the multi-parameter tip configuration.
Data Source
AI summary
The present disclosure provides an adjustable delivery handle system for interchangeably delivering a needle to a biopsy site. The adjustable delivery handle system includes a delivery handle having an inner hub housing component configured to interchangeably receive a needle subassembly that can be inserted into and withdrawn from the proximal handle member. The needle subassembly includes a biopsy needle having a distinct tissue collection distal end configured to maximize tissue sampling yield and collect a cohesive unit of sampled tissue. The distal end of the needle includes first and second tip portions extending therefrom and radially opposing one another. The first tip portion has a length greater than the second tip portion, thereby resulting in an increased surface area of a curvilinear cutting edge extending from the first tip portion to the second tip portion.