Subdermal Trocar Insertion With Payload Retention and Visibility
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Solution Overview
Problem
Existing devices for subdermal insertion of solid media, such as medicated pellets, lack usability features that ensure proper payload retention and clear visibility during the insertion process, leading to potential misplacement or incomplete insertion.
Innovation Solution
A device with a trocar needle featuring a payload retention feature, an indicator window, and a needle hub with a hub indicator tab, allowing clear visibility and controlled movement between extended and retracted positions, along with various trocar types (tab, sleeve, foil, and plug retainers) to securely hold the payload until ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a trocar needle is used for subdermal insertion of solid media, then the payload can be delivered to the target location, but there is a risk of payload loss or incomplete insertion without proper retention features
Solution Approach 1:
The payload retention feature is pre-configured on the trocar needle before insertion, ensuring the payload is securely held during the insertion process. This preliminary preparation prevents payload loss without requiring complex additional mechanisms during the procedure.
Solution Approach 2:
The payload retention feature acts as an intermediary mechanism between the trocar needle and the solid media, providing secure engagement and preventing payload detachment during insertion while maintaining a relatively simple overall device structure.
2Ease of operation
If the needle hub is made movable between extended and retracted positions, then control over insertion depth is improved, but the device structure becomes more complex
Solution Approach 1:
The needle hub is designed to be movable between extended and retracted positions, allowing dynamic adjustment of the trocar needle during the procedure. This provides precise control over insertion depth and timing while using a simple linear movement mechanism rather than complex multi-degree-of-freedom systems.
3Loss of information
If indicator windows and tabs are added to show needle hub position, then visibility and user confidence are improved, but the device structure becomes more complex
Solution Approach 1:
The indicator window and tab system provides visual feedback through color or position changes that are easily observable. This allows users to quickly determine the needle hub position and insertion status without requiring complex electronic displays or additional sensing mechanisms.
Solution Approach 2:
The indicator system automatically displays the needle hub position through the window and tab mechanism as the hub moves between extended and retracted positions. This self-indicating feature provides continuous feedback without requiring external monitoring equipment or additional user actions.
Data Source
AI summary
A device for subdermal insertion of solid media may include a front body defining a window. A device may include a rear body selectively coupled to the front body. A device may include a needle hub received within the front body and the rear body and movable between an extended position and a retracted position. A device may include a trocar coupled to the needle hub and including a payload retention feature.