Biopsy Device Pre-evacuated Vacuum Container
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Solution Overview
Problem
Existing biopsy devices with vacuum assistance have complex constructions that increase production costs and energy consumption, making them less suitable for single-use applications.
Innovation Solution
A biopsy device utilizing a pre-evacuated vacuum container as the vacuum source, which provides a consistent pressure decrease in the tissue compartment through a valve system, eliminating the need for an electric motor and reducing the number of moving parts, thereby simplifying the construction and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electric motor-driven vacuum generation device is used, then vacuum can be generated during the procedure, but the device complexity and energy consumption increase
Solution Approach 1:
The vacuum container is pre-evacuated before use, storing the vacuum state in advance. This eliminates the need for an electric motor-driven vacuum generation device during the procedure, thereby reducing device complexity and energy consumption while maintaining reliable vacuum capability.
Solution Approach 2:
The electric motor and active vacuum generation components are extracted from the device. Instead, a passive pre-evacuated container is used, which provides vacuum through pressure equalization without requiring complex mechanical or electrical systems.
2Device complexity
If a pre-evacuated vacuum container is used, then device complexity is reduced, but vacuum consistency during consecutive sampling operations may be compromised
Solution Approach 1:
The system dynamically adjusts the connection between the pre-evacuated container and the tissue compartment through a controllable valve. This allows the vacuum to be applied consistently during each sampling operation by opening the valve at the appropriate time, maintaining reliability while keeping the device simple.
Solution Approach 2:
The valve system controls the timing and duration of vacuum application by changing the pressure parameter in the tissue compartment. This ensures consistent vacuum-assisted sampling across multiple operations while using a simple pre-evacuated container.
3Productivity
If vacuum is applied during sampling, then tissue sample collection is improved, but leakage and shelf life are reduced
Solution Approach 1:
The vacuum is extracted from the tissue compartment after sampling by closing the valve. This separates the vacuum application phase (during sampling) from the storage phase, preventing leakage and preserving the vacuum state in the container for future use and extending shelf life.
Solution Approach 2:
The vacuum is temporarily used during sampling operations and then recovered by closing the valve. This allows the pre-evacuated container to maintain its vacuum state for multiple sampling operations while still providing vacuum assistance when needed, thus preserving both productivity and reliability.
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 solution allows for a more cost-effective and energy-efficient biopsy device, well-suited for single-use applications, with minimized leakage and extended shelf life due to the use of pre-evacuated vacuum containers and a valve system that preserves vacuum during storage.
Implementation Method 1
vacuum source having the form of at least one initially pre-evacuated vacuum container (91, 92, 93, 94, 95, 96, 21)
Implementation Method 2
provide a pressure decrease in the tissue compartment (6) of the inner sample needle (5)
Data Source
AI summary
A biopsy device having a biopsy needle including an outer cutting needle and an inner sample needle with a tissue compartment. The device can, during each sampling operation, displace the outer cutting needle and the inner sample needle between open and closed positions of the tissue compartment. The biopsy device includes a vacuum source and a valve system to provide a pressure decrease in the tissue compartment at each sampling operation. The vacuum source has the form of at least one initially pre-evacuated vacuum container, and the biopsy device, by means of the initial vacuum of the at least one initially pre-evacuated vacuum container, provides a pressure decrease in the tissue compartment of the inner sample needle at each one of a limited number of consecutive sampling operations.