Rotating Coring Biopsy Assembly for Multi-Sample Tissue Retrieval
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Solution Overview
Problem
Current core biopsy devices face limitations in accurately correlating tissue diagnoses with imaging diagnoses, often requiring invasive open surgical procedures due to difficulties in retrieving larger caliber specimens, which can lead to increased trauma, pain, and complications, and struggle with precise visualization of small lesions.
Innovation Solution
A biopsy device with a tubular coring and transport assembly that allows for multiple sample retrieval during a single insertion, featuring a minimally invasive trough-shaped distal end with rotating cutting elements, enabling precise coring and part-off of tissue samples with minimal disturbance to surrounding tissue, and the ability to deliver medications and imaging markers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If larger caliber specimens are retrieved using current core biopsy devices, then diagnostic accuracy is improved, but tissue trauma and complications increase
Solution Approach 1:
The biopsy device divides the tissue sampling process into multiple discrete coring actions within a single insertion. The cutting element rotates to create multiple separate tissue cores that are collected in the receiving chamber, allowing sufficient diagnostic material to be obtained without requiring a single large-caliber needle that would cause excessive trauma.
Solution Approach 2:
The invention transitions from a single linear penetration approach to a rotational multi-dimensional sampling method. The cutting element rotates around the longitudinal axis of the device, creating tissue cores from multiple angular positions while maintaining the same insertion path, thereby obtaining adequate diagnostic material without increasing insertion trauma.
2Measurement precision
If multiple tissue samples are retrieved, then diagnostic correlation with imaging is improved, but device complexity increases
Solution Approach 1:
The device combines multiple functions into a single integrated system: the rotating cutting element performs multiple coring actions, the receiving chamber collects all samples, and the entire assembly is delivered through a single insertion. This merging of functions achieves multiple sample retrieval without proportionally increasing overall device complexity.
Solution Approach 2:
The biopsy device is designed as a multi-functional instrument that can perform penetration, rotation, multiple tissue coring, sample collection, and potential medication delivery all through a single device platform. This universality allows multiple samples to be retrieved without requiring separate specialized devices for each function.
3Object-affected harmful factors
If a single insertion is used for multiple samples, then patient trauma is reduced, but sample retrieval capability is limited
Solution Approach 1:
The rotating cutting element continuously engages with the tissue during rotation, creating multiple tissue cores in succession without withdrawing the device. This continuous coring action within a single insertion maintains minimal patient trauma while accumulating sufficient diagnostic material through multiple sequential sampling events.
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
Enables accurate and minimally invasive retrieval of tissue samples, reducing trauma and complications, while allowing for precise correlation with imaging abnormalities and delivery of therapeutic agents, thereby improving diagnostic accuracy and reducing the need for invasive procedures.
Implementation Method 1
rotating cutting elements, enabling precise coring and part-off of tissue samples
Data Source
AI summary
An excisional device for either handheld or stereotactic table use may comprise an outer sheath that may comprise a distal trough shape configured to penetrate and/or cut tissue independently or in concert with work element(s). The articulable work element(s) may comprise articulable beak(s) and may be configured to translate and/or rotate at a first rate and to cut tissue in a direction implied by placement of the trough shaped outer sheath. A first helical element or equivalent assembly may be configured to transport tissue cut by the work element(s) and/or trough, may be co-axially disposed relative to the work element(s) and may be operative to rotate at a second rotation rate that is different than the first rate. A proximal sheath may be co-axially disposed relative to the work element(s) and the first helical element, and may be configured to rotate and actuate the work element(s).