Biopsy Instrument Outer Needle-Locking Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional biopsy instruments lack a locking mechanism to control the timing of the outer needle's deployment, leading to accidental shooting or insufficient tissue collection.
Innovation Solution
A biopsy instrument with an outer needle-locking member that includes a trigger, needle carrier, outer needle drive unit, and locking mechanism, allowing precise control over the outer needle's movement to ensure accurate targeting and collection of tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no locking device is provided for the outer needle, then the device structure is simple and easy to operate, but the outer needle may be shot accidentally or before sufficient tissue is introduced into the inner needle
Solution Approach 1:
The locking member is nested within the trigger assembly, with the locking catching bar integrated into the trigger's movement path. The trigger housing contains the locking mechanism components, creating a compact nested structure that adds safety functionality without significantly increasing overall device complexity
Solution Approach 2:
The locking catching bar acts as an intermediary element between the trigger and the outer needle release mechanism. It mediates the trigger's movement by providing a selective blocking function that controls whether the outer needle can be deployed, thus adding reliability through an intermediate control step
2Reliability
If the outer needle is allowed to move freely with the trigger, then the operation is simple and quick, but the outer needle cannot be prevented from shooting when the inner needle is in the wrong area
Solution Approach 1:
The locking catching bar is positioned to preliminarily block the trigger's movement path before the outer needle can be deployed. This preliminary blocking action prevents accidental deployment by creating a mechanical constraint that must be overcome through proper triggering sequence, thus preventing harmful actions before they can occur
Solution Approach 2:
The locking mechanism is designed to be engaged in advance during the trigger's rearward movement, before the forward movement that would release the outer needle. This preliminary engagement ensures that the safety condition is established before the critical deployment action can occur
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 instrument prevents accidental deployment of the outer needle and ensures accurate sampling of target tissue by allowing controlled movement and deployment only when the inner needle is correctly positioned.
Implementation Method 1
an outer needle drive unit 600 provided between the rear end of the base 100 and the needle carrier 400, the outer needle drive unit having a spring 610 to provide driving force so that the outer needle 300 is resiliently shot
Data Source
AI summary
Provided is a biopsy instrument having an outer needle-locking member, which is capable of checking whether an inner needle is placed in target tissue and shooting an outer needle after the tissue is sufficiently introduced into the inner needle, thereby accurately collecting the target tissue that is to be.