Neural Injection System with Blunt Cannula and Sharp Introducer
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Solution Overview
Problem
Existing medical injection systems fail to effectively reduce the risk of injury from sharp blades and edges, and do not provide 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 injury to nerves and blood vessels increases
Solution Approach 1:
The injection system is divided into two functional components: a sharp introducer needle for penetration and a blunt cannula for injection. The introducer has a sharp distal end for piercing tissue, while the cannula has a rounded blunt distal end for safe medication delivery, separating the penetration function from the injection function to eliminate the injury risk associated with sharp needles during the injection phase
Solution Approach 2:
The sharp introducer needle performs the penetration action first to create an access path through the tissue, and only after successful insertion is the blunt cannula advanced through the same path. This preliminary penetration action by the sharp introducer eliminates the need for the blunt cannula to have penetrating capability, allowing it to be completely blunt and safe for neural injection
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 segments the penetration and injection functions into separate components: the introducer needle provides sharp penetration capability while the cannula provides blunt safety for injection. This segmentation allows each component to be optimized for its specific function without compromise
Solution Approach 2:
The sharp introducer needle acts as an intermediary tool that creates the access path through tissue, enabling the subsequent insertion of the blunt cannula. The introducer mediates between the need for penetration and the need for safety by performing the penetrating action before the safe injection component is deployed
3Productivity
If a needle with distal opening is used, then injection efficiency is improved, but risk of intraneural injection increases
Solution Approach 1:
Instead of having the injection opening at the distal end (which risks intraneural injection), the cannula is designed with the distal end completely blunt and closed, and the injection opening positioned laterally on the shaft. This inverts the conventional needle design, placing the opening away from the tissue-contacting distal end to eliminate intraneural injection risk while maintaining injection efficiency through the lateral port
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.