Dual Movable Blade Biopsy Tool for Single-Pass Tissue Sampling
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Solution Overview
Problem
Traditional biopsy forceps are inefficient and time-consuming, often resulting in suboptimal or inadequate tissue samples due to crushing artifacts, and require multiple passes to collect multiple specimens, which compromises histopathological assessment.
Innovation Solution
A multiple core biopsy (MCB) device with a forward-facing cutting edge and deployable depth stops, capable of acquiring multiple high-quality tissue samples in a single pass, using either a single rotating blade or dual counter-rotating blades, with a specimen chamber for temporary storage and preservation of sample integrity and orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional biopsy forceps are used to collect multiple specimens, then multiple tissue samples can be obtained, but the procedure becomes time-consuming and requires multiple passes
Solution Approach 1:
The patent combines multiple biopsy cup positions into a single forceps assembly, allowing multiple tissue specimens to be collected simultaneously during one insertion pass. The forceps include a first cup for a first specimen and a second cup for a second specimen, both capable of being positioned and activated during the same procedural pass, thereby eliminating the need for repeated insertions.
Solution Approach 2:
The biopsy forceps are segmented into multiple independent functional units (first cup and second cup), each capable of independently capturing and holding a tissue specimen. This segmentation allows each cup to operate autonomously while being part of the same forceps assembly, enabling parallel specimen collection without interference between samples.
2Manufacturing precision
If traditional biopsy forceps apply pressure to obtain adequate depth samples, then tissue samples of sufficient depth can be collected, but crush artifacts are created that compromise histopathological assessment
Solution Approach 1:
The patent extracts the tissue sample from the crushing environment of traditional forceps jaws and places it into a protective cup structure. The cup design allows the tissue to be captured and held without continuous compression, removing the harmful crushing effect while maintaining adequate sampling depth through controlled jaw closure followed by sample enclosure.
3Measurement precision
If traditional biopsy forceps are used with frequent removal and retrieval of specimens, then individual samples can be examined, but the process is tedious and reduces procedural efficiency
Solution Approach 1:
Multiple tissue specimens are combined into a single forceps assembly with multiple cups, allowing all specimens to remain in place during one procedural pass. The specimens can be retrieved together or individually maintained within their respective cups, preserving histopathological quality while eliminating the tedious repeated insertion and removal cycles of traditional single-cup forceps.
Data Source
AI summary
A biopsy device comprises a sheath equipped with a removable stylet. The sheath including a terminus with a distal chamber configured with a forward facing cutting edge comprising a plurality of movable blades. The plurality of movable blades including two counter rotating blades configured perpendicular or beveled relative to a long axis of the distal chamber, each counter rotating blade configured to pivot from a separate axis. The biopsy device further comprises a manipulation end controllable by a user to plunge the forward facing cutting edge at a sampling locus after removal of the removable stylet at a depth and to engage a cutting action by the plurality of movable blades at the depth selected to acquire at least one specimen storable in the distal chamber.