Vascular Access Needle Splitting for Guide Wire Preloading
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Solution Overview
Problem
The Seldinger technique for percutaneous access is cumbersome, particularly due to the need to manually remove the introducer needle from the guide wire, which increases procedure time and risks losing control of the guidewire, and prevents preloading of subsequent catheters.
Innovation Solution
A disassembling needle with separable portions, allowing for rapid removal along the guide wire without sliding off the extracorporeal end, facilitated by seams that split upon rotational compression or hinge mechanisms, enabling direct withdrawal and simplifying the insertion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the introducer needle is manually removed from the guide wire by sliding it off the extracorporeal end, then the needle can be separated from the guide wire, but the procedure time increases and the risk of losing guide wire control increases
Solution Approach 1:
The needle is divided into two separable portions: a proximal portion and a distal portion connected by a seam. This segmentation allows the needle to be quickly separated into two parts that can be independently removed from the guide wire, eliminating the time-consuming sliding motion required by traditional single-piece needles.
Solution Approach 2:
The seam connecting the proximal and distal portions is strategically positioned and designed to allow easy separation. By extracting the connection at this specific location, the needle can be rapidly disassembled without affecting the guide wire, thereby reducing procedure time and maintaining guide wire control.
2Ease of operation
If the introducer needle is manually removed by sliding it off the extracorporeal end, then the needle can be separated from the guide wire, but the risk of losing control of the guide wire increases
Solution Approach 1:
Dividing the needle into separable proximal and distal portions allows the operator to remove each segment independently while maintaining grip on the guide wire. The seam separation mechanism enables controlled disassembly without the need to slide the entire needle length off the guide wire, thereby preserving guide wire control throughout the removal process.
3Ease of operation
If the needle is removed by sliding it off the extracorporeal end, then the needle can be separated from the guide wire, but preloading of subsequent catheters is prevented
Solution Approach 1:
The separable needle design with a seam allows the needle to be quickly divided and removed in two stages. This rapid separation creates immediate availability of the guide wire for loading subsequent catheters, thereby improving workflow efficiency and enabling preloading operations without delay.
Solution Approach 2:
By enabling rapid needle separation through the seam mechanism, the guide wire becomes immediately available for preloading with catheters before they are needed. This preliminary action of preparing catheters in advance on the guide wire streamlines the overall procedure and improves productivity.
Data Source
AI summary
A vascular access disassembling needle assembly is provided that enables rapid insertion of a guide wire into the needle and subsequent rapid removal of the access needle off the guide wire by facile disassembly of the needle. The disassembling needle assembly includes a needle portion wherein the needle breaks apart by splitting along at least one seam that extends from the proximal to the distal end to allow removal of the guide wire. Various mechanical features are described that can facilitate the separation of the needle body along at least one seam. Once one or more seams are separated, the needle body may be removed from the guide wire without the need to withdraw the needle along the length of the guide wire, which permits preloading of expanders and other medical devices onto the guidewire.