Biopsy Needle Angled Cutouts Tissue Collection
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Solution Overview
Problem
Current needle biopsy procedures face challenges in acquiring sufficient tissue samples, especially with larger gauge needles, which are difficult to navigate through tortuous anatomy and often result in samples contaminated with blood, making diagnosis difficult.
Innovation Solution
A biopsy needle with laterally extending angled cut-outs and tabs that vent liquids and gases while cutting additional tissue as it is withdrawn, allowing for a larger sample collection without clogging, and a method involving insertion through an endoscope to facilitate tissue collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If larger gauge needles are used to acquire more tissue, then the quantity of tissue sample is improved, but the ease of operation deteriorates due to difficulty in passing through tortuous paths
Solution Approach 1:
The needle body is segmented with multiple cutouts along its length, creating multiple openings that allow the needle to pass through tortuous paths more easily while still collecting adequate tissue sample through the combined openings
2Quantity of substance
If larger gauge needles are used to acquire more tissue, then the quantity of tissue sample is improved, but the purity of the sample deteriorates due to increased blood contamination
Solution Approach 1:
Multiple smaller cutouts distribute the tissue collection across several openings, allowing better control over sample acquisition and reducing blood contamination compared to a single large opening, while still achieving sufficient total tissue quantity
Solution Approach 2:
The cutouts are strategically positioned and sized to optimize local tissue capture while minimizing blood entry, with each cutout serving a specific function in the overall sampling process
3Quantity of substance
If multiple cutouts are added to the needle body, then the tissue sample quantity is improved, but the device complexity increases
Solution Approach 1:
The needle incorporates multiple cutouts along its body, dividing the tissue collection function across several openings. This segmentation increases tissue sample quantity while maintaining relatively simple manufacturing through standard cutting processes
Data Source
AI summary
A device for collecting a tissue sample includes a needle body extending along a longitudinal axis from a proximal end to a distal end and including a channel extending longitudinally therethrough and a plurality of cut outs extending laterally into the needle body, each of the plurality of cut outs extending at an angle relative to the longitudinal axis from an outer surface of the needle body toward the distal end thereof so that the channel is open to an exterior of the needle body via the plurality of cut outs.