Biopsy Device With Nested Cutting for Adequate Tissue Samples
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current biopsy procedures for lung tissue, such as lung biopsy, are invasive, require hospitalization, and yield insufficient tissue samples for detailed analysis, leading to prolonged recovery and high costs.
Innovation Solution
A biopsy device with a cutting member and engagement member, allowing for precise tissue sampling through a hollow shaft, and a method involving a cutting mechanism to sever and withdraw tissue samples with minimal invasiveness, using local analgesia and small incisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional minimally invasive biopsy tools (fine needle aspiration, core needle biopsy) are used, then the procedure is less invasive, but the specimen size is insufficient for detailed parenchymal or interstitial architectural analysis
Solution Approach 1:
The biopsy device segments the cutting action into two distinct members: a cutting member with cutting edges that initially engages tissue, and an engagement member with engagement edges that subsequently engages the cutting member to finish the cut. This segmentation allows each member to be optimized for its specific function while collectively achieving both low invasiveness and adequate specimen size.
Solution Approach 2:
The engagement member is movably connected to the hollow shaft in a nested arrangement, allowing it to move rotationally and axially relative to the cutting member. The engagement member can be positioned within the hollow shaft and rotated into engagement with the cutting member, creating a compact nested structure that enables sufficient cutting action while maintaining minimal invasiveness.
2Quantity of substance
If traditional lung biopsy procedures are performed, then adequate tissue samples are obtained, but the procedure requires hospitalization, general anesthesia, and prolonged recovery
Solution Approach 1:
The biopsy device integrates multiple functions into a single tool: the hollow shaft serves as both the delivery vehicle for the cutting mechanism and the retrieval pathway for the tissue sample. The cutting member and engagement member work together to provide adequate cutting action, while the entire assembly can be withdrawn through the same hollow shaft. This multi-functionality reduces procedure complexity while maintaining tissue sample adequacy.
Solution Approach 2:
The engagement member is designed to be movable relative to the cutting member, allowing rotational and axial movement. This dynamic capability enables the engagement member to engage with the cutting member at the appropriate moment to finish the cut, providing adequate tissue sampling while simplifying the overall procedure through controlled, dynamic actions rather than complex static mechanisms.
3Quantity of substance
If conventional biopsy approaches are used, then tissue sampling is achieved, but postoperative complications include air leak, pain control requiring narcotics, and prolonged hospitalization
Solution Approach 1:
The engagement member is extracted as a separate, movable component from the cutting member, allowing it to be independently positioned and engaged. This extraction enables the engagement member to be pulled back or repositioned after completing its cutting function, thereby closing the tissue tract and preventing air leaks and hemorrhage, while still achieving adequate tissue sampling.
Solution Approach 2:
The engagement member is designed to engage with the cutting member in a controlled manner that preliminarily seals the tissue tract before the cutting action is complete. This preliminary engagement prevents air leaks and hemorrhage from occurring in the first place, rather than merely treating complications after they arise, while still allowing adequate tissue to be sampled.
Data Source
AI summary
Biopsy devices and methods are disclosed herein. In an embodiment, a biopsy device includes a hollow shaft, a cutting member and an engagement member. The cutting member is connected to an end of the hollow shaft and configured to cut into tissue. The engagement member is movably connected to the hollow shaft and configured to move rotationally and axially relative to the cutting member. The engagement member is configured to move from a first position to a second position engaging the cutting member after the cutting member has initially engaged the tissue.