Neural Injection System with Blunt Cannula and Stylet
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Solution Overview
Problem
Existing medical injection systems do not adequately reduce the risk of injury from sharp blades and edges, and lack enhanced capabilities for neural injection.
Innovation Solution
A neural injection system featuring a hollow cannula with a rounded open blunt distal end and a side port for fluid communication, along with a stylet that can be releasably locked, and an introducer for accessing tissues that cannot be punctured by the blunt end, designed to enhance injection characteristics and reduce injury risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a sharp needle is used for injection, then penetration capability is improved, but risk of intraneural and intravascular injury increases
Solution Approach 1:
The injection system is divided into two separate components: a sharp needle for tissue penetration and a blunt cannula for medicament delivery. The needle is inserted first to create the access path, then removed, leaving only the blunt cannula in place for injection. This segmentation allows each component to perform its specialized function optimally while eliminating the harmful sharp edge during the injection phase.
Solution Approach 2:
The sharp needle performs the preliminary action of creating an access path through the tissue before the blunt cannula is advanced. The needle is inserted to the target depth, then withdrawn, having already prepared the pathway. This preliminary penetration action allows the subsequent blunt cannula to be advanced safely without requiring sharp edges, thereby reducing injury risk during the actual injection process.
2Object-affected harmful factors
If a blunt needle is used for injection, then safety is improved, but penetration capability deteriorates
Solution Approach 1:
The system separates the penetration function (performed by the sharp needle) from the injection function (performed by the blunt cannula). The blunt cannula is designed specifically for safe medicament delivery without sharp edges, while the needle handles the difficult penetration task. This functional segmentation allows the blunt cannula to maintain safety while still achieving effective tissue access through the preliminary needle action.
Solution Approach 2:
The sharp needle acts as an intermediary tool that facilitates the insertion of the blunt cannula. The needle creates the initial access path through tough tissue barriers, enabling the blunt cannula to reach the target site without requiring sharp edges itself. This intermediary action resolves the contradiction by allowing the blunt cannula to achieve penetration capability indirectly while maintaining its inherent safety advantages.
3Adaptability or versatility
If multiple cannulae are inserted simultaneously, then surgical versatility is improved, but device complexity increases
Solution Approach 1:
The blunt cannula is designed to be inserted through the tract created by the needle, effectively nesting the injection device within the access pathway. This nested arrangement allows multiple instruments to be positioned at different depths and angles without requiring complex multi-component assemblies. The simple sequential insertion method maintains low device complexity while enabling versatile surgical configurations.
Data Source
AI summary
A novel neural injection system and related methods are herein disclosed. Various embodiments of an embodiment of a neural injection system of the present invention provide for at least one benefit of enhanced injection characteristics, increased operational efficiency, reduced cost per unit, reduced incidence of injury through intraneural/intravascular injection, reduced incidence of injury through pricking/piercing, and/or the like.