Angled Cutter Tip Minimizes Tissue Trauma During Biopsy
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Solution Overview
Problem
Current hollow probe aspiration devices for minimally invasive procedures face challenges in effectively and efficiently cutting and removing tissue with minimal trauma, requiring simpler designs and improved cutting mechanisms.
Innovation Solution
A hollow probe with a cutter having an angled and rounded cutting tip, facilitated by a grinder for forming a concave grind cutting edge, allows for effective tissue cutting with predominantly axial motion, enhancing cutting efficiency and minimizing tissue trauma.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a hollow probe aspiration device is used for tissue removal, then minimally invasive procedures can be performed, but effective and efficient cutting and removal of tissue is difficult to achieve with minimal trauma
Solution Approach 1:
The device is divided into separate functional components: a hollow probe for aspiration, a cutter with cutting tip for tissue removal, and a receiver for collecting samples. This segmentation allows each component to be optimized for its specific function while working together to achieve efficient tissue removal with minimal trauma.
Solution Approach 2:
The cutter is pre-positioned within the hollow probe, and the cutting tip is pre-formed with specific geometry. The receiver is pre-configured to receive the cutter and facilitate sample collection. This preliminary arrangement enables rapid and efficient tissue removal procedures without requiring complex assembly or adjustment during use.
2Productivity
If additional and alternative designs are provided for hollow probe devices, then cutting efficiency can be improved, but device complexity increases
Solution Approach 1:
The hollow probe, cutter, and receiver are merged into a single integrated device assembly. The cutter fits within the hollow probe, and the receiver accommodates both components, creating a unified structure that simplifies handling and operation while maintaining high cutting efficiency through the combined functionality of its parts.
Solution Approach 2:
The device is designed to perform multiple functions: the hollow probe provides both aspiration capability and houses the cutter for tissue removal, while the receiver facilitates both sample collection and device disassembly. This multi-functionality reduces the need for separate instruments and simplifies the overall procedure.
3Ease of manufacture
If a simple design is used for the device, then ease of manufacture and use is improved, but cutting effectiveness may be compromised
Solution Approach 1:
The cutting tip is formed with a curved or rounded geometry rather than a sharp angular shape. This curved design allows the cutter to effectively follow the contours of tissue surfaces, maintaining cutting effectiveness while being simpler to manufacture and less prone to damage during use.
Solution Approach 2:
The cutting tip parameters (such as curvature radius, angle, and material properties) are optimized to balance cutting effectiveness with manufacturing simplicity. By carefully selecting and adjusting these parameters, the device achieves reliable tissue removal while maintaining ease of manufacture and use.
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 device enables efficient cutting and removal of tissue with reduced trauma to the patient, allowing for multiple samples to be taken in a single insertion, with a simple and versatile design suitable for various minimally invasive procedures.
Implementation Method 1
facilitated by a grinder for forming a concave grind cutting edge
Implementation Method 2
Devices utilizing hollow probe aspiration are useful for removing and/or obtaining samples of tissue
Data Source
AI summary
A medical device for severing and removing small amounts of internal tissue for biopsy sampling or other purposes is disclosed. Versions of the device may include a hollow probe having a piecing tip, a tissue receiving aperture and a vacuum lumen; a cutter within the probe having a cutting edge that moves past the tissue receiving aperture, and a cutter driver mechanism. A cutter for use with versions disclosed herein may include an angled cutting tip and a cutting edge having a concave grind. Versions of the device also may include an aspirator fluidly connected to the vacuum lumen, coordinated operation of the aspirator and the cutter driver mechanism, and a fluid management system. Versions described may be used for removing multiple samples of tissue during a single insertion of the probe proximate to a target tissue mass.