Rotating Hollow Biopsy Needle for Intact Deep Tissue Sampling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing biopsy instruments are complex, require suction, and often provide inadequate or damaged tissue samples, especially for deep lesions, making diagnosis time-consuming and uncomfortable for patients.
Innovation Solution
A biopsy instrument with a smooth interior surface and motor-driven rotation and advancement mechanism that cuts and retrieves tissue samples with minimal damage by adhesion, allowing multiple samples to be taken efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If forceps are used to retrieve tissue samples, then the instrument structure is simple, but the sample size is insufficient and tissue damage occurs due to tearing
Solution Approach 1:
The invention extracts the tissue sample from the body through a needle channel, isolating the sampling function from the insertion function. The needle serves as both insertion tool and sample retrieval channel, allowing intact core samples to be extracted without tearing by forceps.
Solution Approach 2:
Instead of grasping tissue with forceps and pulling it out (which causes tearing), the invention inverts the approach by pushing a needle through the tissue and allowing the tissue to be drawn into the needle channel, where it is retrieved intact without mechanical grasping.
2Length of stationary object
If fine needles are used to reach deep tumours, then the insertion depth is sufficient, but the retrieved sample amount is too small and cells are dispersed
Solution Approach 1:
The invention nests the sample retrieval channel within the needle structure. The hollow needle channel contains the pathway for tissue extraction, allowing the needle to serve dual purposes: deep insertion and sample retrieval. This nested design enables core samples to be obtained at depth without requiring separate instrumentation.
3Measurement precision
If multiple biopsies are taken for diagnosis, then diagnostic accuracy improves, but the procedure becomes time-consuming and inconvenient
Solution Approach 1:
The invention creates a universal biopsy instrument that can obtain multiple adequate tissue samples through a single insertion procedure. The needle design allows sequential sampling at different depths and locations without requiring repeated insertions, making the instrument versatile for comprehensive diagnostic evaluation.
4Productivity
If suction is applied to retrieve tissue samples, then sample retrieval is enhanced, but the instrument complexity increases
Solution Approach 1:
The invention enables the needle to serve itself by using its own structural features (hollow channel, sharp distal end) to perform both insertion and sample retrieval functions. The tissue is drawn into the needle channel through the pressure differential created during withdrawal, eliminating the need for external suction devices or complex retrieval mechanisms.
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 instrument enables rapid retrieval of sufficient tissue samples for accurate diagnosis with minimal patient discomfort and sample damage, facilitating controlled harvesting and increased diagnostic accuracy.
Implementation Method 1
a circumferential outer surface of the core at least partly abutting the smooth interior surface of the sample acquiring portion, where-by the core of the tissue is detached from the tissue by a pulling force due to the retraction of the hollow tube and due to an adhesive force formed at an interface between the smooth interior surface and the circumferential outer surface of the core
Data Source
AI summary
A biopsy instrument (1) comprising a base member (10) which extends from a proximal end (10a) to a distal end (10b) along a central geometrical axis (A), wherein at least a distal end portion (10b′) of the base member (10) is shaped as an elongated hollow tube (10), the distal end (10b) being intended to be at least partly inserted into a tissue (50) from which a biopsy is to be obtained, wherein the hollow tube (10) is provided with a distally facing circular cutting edge (11) defining a mouth (10c) of the distal end (10b) of the hollow tube (10), wherein the hollow tube (10) has, at a distal portion (10b′) of the hollow tube (10), a hollow elongated tubular sample acquiring portion (10b′) having a smooth interior surface (12). The disclosure also relates to a kit of parts and a method of acquiring a biopsy.