Biopsy Device Translating Shuttle Valve Assembly
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Solution Overview
Problem
Current biopsy devices lack an efficient and portable mechanism for obtaining tissue samples with a compact and user-friendly design that integrates vacuum and motive force transmission without being tethered to other devices.
Innovation Solution
A biopsy device comprising a probe and a holster with a needle assembly that uses a vacuum pump and motor to induce vacuum for tissue sample collection, featuring a cutter actuation assembly and valve assembly for precise tissue extraction and sample transport, allowing for both reusable and disposable configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a biopsy device integrates vacuum pump and motor for portable operation, then the device achieves self-contained operation without tethering, but the device size and complexity increase
Solution Approach 1:
The needle assembly is disposed within the probe, and the cutter is disposed within the needle assembly, creating a nested configuration where smaller components are housed within larger ones. This nesting approach allows integration of multiple functions (vacuum generation, cutting, tissue extraction) in a compact arrangement that reduces overall device footprint while maintaining portability.
Solution Approach 2:
The biopsy device integrates multiple functions into a single self-contained unit: the vacuum pump generates negative pressure for tissue extraction, the motor drives the cutter for tissue sectioning, and the manifold distributes fluid pathways. This multi-functional integration eliminates the need for external tethering while consolidating operations into one portable device.
2Reliability
If a translating valve assembly is used to seal apertures in the manifold, then vacuum and motive force transmission are precisely controlled, but the device complexity increases
Solution Approach 1:
The translating valve assembly replaces complex multi-component sealing mechanisms with a simpler translating motion system. The valve translates linearly within the manifold to selectively seal or open apertures, using straightforward mechanical translation rather than complex rotational or multi-stage sealing systems, thereby reducing overall valve assembly complexity while maintaining reliable vacuum control.
3Manufacturing precision
If the cutter is actuated to translate and rotate for tissue sectioning, then precise tissue sample extraction is achieved, but the ease of operation decreases
Solution Approach 1:
The cutter is configured to automatically translate and rotate through its own motor-driven mechanism without requiring manual manipulation by the operator. The system self-regulates the cutting motion, translating the cutter along the needle assembly and rotating it for sectioning, thereby maintaining high precision while reducing the operational burden on the user.
4Adaptability or versatility
If the device is designed as a complete integrated system with probe and holster, then functionality is enhanced, but the weight and size of the device increase
Solution Approach 1:
The biopsy device is divided into two main segments: a disposable probe containing the needle assembly and cutter, and a reusable holster containing the vacuum pump and motor. This segmentation allows the heavy components to be separated from the disposable portion, enabling the probe to remain lightweight for patient comfort while the holster provides the necessary power and vacuum generation capabilities.
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 efficient and portable tissue sample collection with a compact design, facilitating easy handling and integration of vacuum and motive force transmission, enhancing the biopsy process with a versatile and user-friendly interface.
Implementation Method 1
A biopsy device is disclosed that uses a vacuum pump and motor to induce vacuum for drawing a tissue sample into a needle assembly.
Implementation Method 2
A biopsy device comprising a probe and a holster with a needle assembly that uses a vacuum pump and motor to induce vacuum for drawing a tissue sample into the needle assembly, and sectioning the tissue sample with a cutter actuated by a cutter actuation assembly.
Data Source
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AI summary
A biopsy device includes a body, a needle, a cutter, and a valve assembly. The needle extends distally relative to the body and defines a first lumen, a second lumen and an opening fluidly coupling the first lumen with the second lumen. The cutter is configured to translate relative to the needle. The valve assembly includes a manifold and a spool body. The manifold includes a proximal vent opening. The spool body is movable relative to the proximal vent opening between a first position and a second position. The second lumen is coupled to the proximal vent opening when the spool body is in the first position. The second lumen is sealed relative to the proximal vent opening when the spool body is in the second position. The spool body is configured to transition between the first and second position by moving in proportion to translation of the cutter.