Tissue Sampling Tool with Symmetric Orifice Cutting Angles
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Solution Overview
Problem
Current adipose tissue sampling methods using cannulas or needles often result in tissue lesions, extensive bleeding, and low-quality tissue samples due to tearing, and existing solutions are complex and not precise.
Innovation Solution
A sampling tool with a tubular design featuring symmetrically arranged sampling orifices bordered by transverse and longitudinal edges forming a cutting angle between 6° to 18°, with a cup-shaped longitudinal border profile to minimize tissue tearing and ensure clean cutting, and a blunt distal end for atraumatic insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional cannula with circular orifices is used for adipose tissue sampling, then the sampling process is simple, but tissue tearing occurs leading to poor sample quality and extensive bleeding
Solution Approach 1:
The invention changes the geometric parameters of the sampling orifice by introducing specific border configurations (transverse and longitudinal borders with defined angles) rather than using conventional circular orifices. The transverse borders form cutting angles between 30-60 degrees with the tube axis, creating a precise cutting action that eliminates tissue tearing while maintaining sampling effectiveness.
2Manufacturing precision
If a complex ablation system with movable cutting tools is used, then cutting capability is improved, but the device complexity increases and precision is reduced
Solution Approach 1:
The invention extracts and eliminates the complex movable cutting tool mechanism from the sampling device. Instead, it integrates the cutting function directly into the static orifice borders of the tube, which are precision-formed during manufacturing. This extraction of the movable component simplifies the device while maintaining precise cutting capability through the fixed angular borders.
Solution Approach 2:
The invention merges the sampling and cutting functions into a single integrated structure - the orifice with its transverse and longitudinal borders. The cutting action is inherent to the orifice geometry itself, combining what were previously separate functions (sampling opening and cutting mechanism) into one unified component.
3Reliability
If conventional sampling methods are used, then the procedure is quick, but tissue lesions occur causing inflammation and bleeding
Solution Approach 1:
The invention changes the geometric parameters of the sampling orifice by introducing specific border configurations (transverse and longitudinal borders with defined angles) rather than using conventional circular orifices. The transverse borders form cutting angles between 30-60 degrees with the tube axis, creating a precise cutting action that eliminates tissue tearing while maintaining sampling effectiveness.
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 tool effectively minimizes tissue tearing, enables painless and fast sampling, and collects high-quality adipose tissue samples of controlled size, while being simple in design and easy to use without moving parts.
Implementation Method 1
each transverse border co-operating with the inside face to form a cutting angle lying in the range 6° to 18°
Data Source
AI summary
A tissue-sampling tool is made in the form of a tube presenting an inside face of circular section and an outside face of circular section, the tube having a blunt distal end and at least one sampling orifice extending symmetrically relative to a transverse plane and to a longitudinal plane. The orifice is peripherally bordered by two transverse borders that are symmetrical relative to the transverse plane and that are connected to two longitudinal borders that are symmetrical relative to the longitudinal plane. Each transverse border possesses a cutting edge situated at the intersection between said borders and the inside face, each transverse border co-operating with the inside face to form a cutting angle lying in the range 6° to 18°. The longitudinal borders have a cup-shape relative to the transverse borders, with a profile in the longitudinal plane that is different from the profile of the transverse borders.