Biopsy Cannula Latching Lever for Single-Handed Operation
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Solution Overview
Problem
Current biopsy techniques face challenges in efficiently accessing biopsy sites, transporting tissue samples to sample containers, and facilitating single-handed operation of coaxial introducer cannulas.
Innovation Solution
A biopsy apparatus with a sample container and coaxial introducer cannula is designed. The sample container features a mounting channel that engages a mounting pin on the sample manifold, allowing for easy rotation and secure attachment. The coaxial introducer cannula includes a latching lever that enables single-handed rotation and disconnection from the biopsy apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coaxial introducer cannula is used to maintain access path to the lesion, then the lesion/site position is maintained after sampling, but the connection and disconnection of the coaxial introducer cannula requires two hands and is awkward or difficult
Solution Approach 1:
The coaxial introducer cannula incorporates a self-latching mechanism with a latch member and engagement feature that automatically secures the cannula to the biopsy apparatus upon insertion, eliminating the need for manual two-handed connection. The disconnection is facilitated by a release mechanism that allows single-handed operation.
Solution Approach 2:
The manual two-handed connection mechanism is replaced with an automated mechanical latching system that uses spring-loaded engagement features and complementary geometric shapes to achieve secure attachment through simple insertion motion, reducing the operational complexity from two-handed to single-handed operation.
2Ease of operation
If an open specimen tray is used to remove specimens, then access to tissue specimens for examination is provided, but there is a risk of specimen loss
Solution Approach 1:
A flexible membrane or thin film covers the specimen tray, creating a barrier that prevents specimen loss while allowing operators to access specimens through the membrane for examination. This maintains both specimen retention and accessibility.
Solution Approach 2:
The specimen tray is nested within a protective housing or container that provides retention walls. The tray can be opened or accessed in a controlled manner while remaining contained within the protective structure, preventing specimen loss during handling and transport.
3Reliability
If the sample container is designed with secure attachment mechanisms, then specimen loss is reduced, but the complexity of the sample container increases
Solution Approach 1:
The attachment mechanisms are integrated into the existing biopsy apparatus structure rather than being separate components. The sample container uses the same latching and engagement features as other parts of the system, reducing overall complexity while maintaining secure attachment.
Solution Approach 2:
The sample container employs universal engagement features that work with multiple components of the biopsy apparatus. A single set of attachment mechanisms serves multiple functions: securing the container to the apparatus, enabling easy removal, and providing specimen retention, thereby reducing the need for separate complex mechanisms.
Data Source
AI summary
A coaxial introducer cannula is provided for use with a biopsy apparatus. The coaxial introducer cannula may comprise a coaxial cannula and a hub. The hub may be fixedly attached to a proximal portion of the coaxial cannula. The hub may have a hub body, a latching lever, and a latch. The latch may be configured to rotatably engage a catch of the biopsy apparatus, and the latching lever may extend radially from the hub body. The latching lever may be longer than a height of a front plate of the biopsy apparatus so that the latching lever can be reached and rotationally operated to rotate the hub relative to the front plate of the biopsy apparatus.