Distal Needle Tip With Annular Chamber For Controlled Material Diffusion
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Solution Overview
Problem
Depositing material at a specific target location within the body is challenging due to difficulties in conveying and releasing the material in a controlled manner, especially when the target is not directly beneath the skin's surface, and existing solutions often result in material leakage before reaching the desired location.
Innovation Solution
The development of distal needle tips with annular chambers and material distribution elements that diffuse fluid flows through multiple egress points, or tips with movable members controlled by stylets or rotatable augers to manage the release of material at the target site.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If material is conveyed through a lumen to a target location, then the material can be delivered to the desired location, but the material may seep out of the implement before reaching the target location
Solution Approach 1:
The material is loaded into the lumen before the needle is inserted into the body. The stylet is pre-positioned to block the distal end of the lumen, preventing material leakage during insertion. This preliminary setup ensures material containment is established before the critical delivery phase begins.
Solution Approach 2:
The stylet acts as an intermediary blocking element that seals the distal end of the lumen. By introducing this intermediate component, the system prevents direct communication between the material supply and the external environment during insertion, thereby preventing leakage while maintaining the ability to deliver material when needed.
2Quantity of substance
If material is released from the implement, then the material can be deposited at the target location, but the release may not be controlled
Solution Approach 1:
The system provides mechanical feedback through the stylet mechanism. When the stylet is withdrawn or repositioned, it directly controls the opening of the distal end of the lumen, creating a clear cause-and-effect relationship between operator action and material release. This feedback mechanism ensures that material deposition occurs only when intentionally triggered.
Solution Approach 2:
The stylet is designed to be movable rather than fixed, allowing dynamic control over the distal end of the lumen. The stylet can be repositioned along the length of the needle, enabling controlled opening and closing of the material delivery pathway. This dynamic element provides precise temporal control over material release.
3Ease of operation
If a stylet is used to control material release, then the release can be controlled, but the device complexity increases
Solution Approach 1:
The stylet serves multiple functions: it provides structural support to the needle during insertion, seals the distal end of the lumen to prevent leakage, and controls material release when repositioned. By making this single component multi-functional, the design avoids adding separate mechanisms for each function, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The stylet combines the functions of a stylette (structural support), a valve (sealing), and a control mechanism (material release) into a single integrated component. This merging of functions reduces the number of separate parts needed in the system, offsetting the complexity introduced by the controlled release capability.
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
These solutions enable precise and controlled deposition or collection of materials within the body by diffusing fluid flows or using mechanical mechanisms to open or rotate chambers, ensuring effective delivery and retrieval without leakage.
Implementation Method 1
The material distribution element diffusively passes the fluid flow out of multiple egress points in at least one of a distal end and a lateral surface of the tip body
Data Source
AI summary
Disclosed embodiments include apparatuses and methods for using a tip member to deposit or collect a supply of material from within a body. In an illustrative embodiment, an apparatus includes a tip body defining an annular chamber. A tip receptacle is configured to be joinable with a lumen and to receive a fluid flow therethrough and to convey the fluid flow into the annular chamber. A material distribution element is fluidly coupled with the annular chamber, wherein when the fluid flow is introduced into the annular chamber. The material distribution element diffusively passes the fluid flow out of multiple egress points in at least one of a distal end and a lateral surface of the tip body.