Safety Neural Injection System with Segmented Cannula and Stylet
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Solution Overview
Problem
Conventional needles used in medical procedures often clog and have a high risk of leakage, and their sharp tips can cause internal injuries, making them inefficient for safe and effective tissue penetration.
Innovation Solution
A safety neural injection system featuring a hollow cannula with a metal ball tip and a flexible stylet with a shaped tip, which can be locked within the cannula and includes a side port for fluid communication, reducing the risk of clogging and internal injuries by providing a smooth and controlled delivery of therapeutic, diagnostic, or prophylactic agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional needles with sharp tips are used for tissue penetration, then penetration efficiency is improved, but internal injury risk increases
Solution Approach 1:
The injection system is divided into two separate components: a cannula for tissue penetration and a needle for agent delivery. The cannula has a rounded or flattened tip that safely penetrates tissue without causing internal injury, while the needle is introduced through the cannula's side port to deliver the agent, separating the penetration function from the injection function.
Solution Approach 2:
The cannula acts as an intermediary device that facilitates safe tissue penetration and serves as a conduit for introducing the needle. The rounded tip of the cannula provides a safe leading edge that minimizes tissue damage while allowing the sharp needle to be introduced through its side port for agent delivery.
2Ease of operation
If conventional needles are used for agent delivery, then injection capability is provided, but clogging and leakage risks increase
Solution Approach 1:
The system separates the penetration function (cannula) from the injection function (needle). The cannula with its larger bore and rounded tip resists clogging during penetration, while the needle delivers the agent through a side port, allowing for better control and reduced leakage risk.
Solution Approach 2:
Different parts of the system have optimized properties for their specific functions: the cannula has a larger bore and rounded tip for safe penetration and resistance to clogging, while the needle has a precise tip for controlled agent delivery through the side port, minimizing leakage.
3Reliability
If a hollow cannula with side port is used, then clogging risk is reduced, but device complexity increases
Solution Approach 1:
The cannula serves multiple functions: it acts as the leading element for tissue penetration with its rounded tip, provides a conduit for introducing the needle through its side port, and serves as the outer sheath that protects surrounding tissue. This multi-functionality justifies the slightly increased structural complexity.
4Object-affected harmful factors
If a flexible stylet with shaped tip is inserted into the cannula, then internal injury risk is reduced, but device complexity increases
Solution Approach 1:
The flexible stylet is inserted into the lumen of the cannula, with the stylet's shaped tip providing a safe leading edge that protects surrounding tissue. The stylet can be removed after penetration to allow agent delivery through the side port, demonstrating a nested configuration that reduces internal injury risk.
Solution Approach 2:
The flexible stylet with its shaped tip is inserted into the cannula before penetration to provide a safe leading edge that protects surrounding tissue. This preliminary protective action is in place during the critical penetration phase, then the stylet can be removed to allow agent delivery.
Data Source
Figure 1
Figure 2
Figure 3A~3E
AI summary
Disclosed herein are safety neural injection systems and related methods of use comprising a cannula, with or without a side port, and a stylet, defined by a first inside diameter, a first outside diameter, a first length, and an open distal end in fluid communication with the inside and outside of the hollow cannula wherein the medicament is administered with the stylet inserted at least partially within the cannula. In various embodiments, the safety neural injection system comprises a metal ball tip.