Angled Inlet Infusion Coupling Vortex Disruption
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Solution Overview
Problem
Conventional IV infusion couplings suffer from 'dead volume' issues due to vortex formation, leading to retained medication, delayed onset time, and potential mixing of incompatible drugs, which can result in incomplete dosing and incompatibility.
Innovation Solution
The infusion coupling features angled branch inlets and a transverse bar to disrupt circular flow, preventing vortex formation and ensuring complete flushing of medications, with each inlet positioned at an acute angle (30-45°) and a transverse bar across the interior diameter to direct fluid flow efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional IV infusion couplings use perpendicular or aligned branch inlets to merge IV lines, then multiple medications can be administered through a common IV line, but vortex formation occurs causing medication retention and delayed onset time
Solution Approach 1:
The patent applies asymmetry by positioning branch inlets at non-perpendicular, non-aligned angles relative to the main flow direction. Specifically, first and second branch inlets are positioned at different angles to disrupt symmetric flow patterns that would otherwise create vortices, thereby reducing medication retention while maintaining multi-medication administration capability
Solution Approach 2:
The patent introduces a spatial dimension solution by arranging branch inlets in a three-dimensional configuration rather than simple planar alignment. The inlets are positioned at different angular orientations in space, creating a multi-dimensional flow distribution that prevents the formation of circular vortex currents and reduces dead volume
2Ease of manufacture
If conventional IV infusion couplings use standard inlet configurations, then manufacturing is simple, but vortex currents retain medication causing potential mixing of incompatible drugs
Solution Approach 1:
The asymmetric angular positioning of branch inlets creates a flow pattern that prevents medication retention and mixing. This geometric asymmetry is incorporated into the molded body structure, maintaining ease of manufacture through standard molding techniques while significantly improving reliability by eliminating vortex-induced medication mixing
Solution Approach 2:
The patent applies local quality by optimizing the specific angular positioning of each branch inlet location on the vessel body. Each inlet is positioned at a predetermined angle tailored to its specific location and function, creating locally optimized flow conditions that prevent vortex formation and medication retention throughout the interior volume
3Device complexity
If branch inlets are positioned at standard angles, then device complexity is low, but dead volume increases leading to incomplete dosing
Solution Approach 1:
The patent changes the critical parameter of inlet angle from standard perpendicular or aligned configurations to specific non-standard angles. This parameter modification optimizes flow dynamics to eliminate dead volume and vortex formation, ensuring complete medication delivery without requiring increased device complexity
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
This configuration reduces 'dead volume', minimizes medication retention, and ensures timely and pure delivery of successive medication courses, preventing incompatibility and ensuring complete dosing.
Implementation Method 1
The inlets are angled on the body of the infusion coupling based on a flow and current for reducing or eliminating a vortex effect from fluid flow
Data Source
AI summary
An infusion coupling allows administration of IV drugs to a patient through an IV fluid line, and ensures that successive courses of medication are fully passed or flushed from the line to prevent mixing of incompatible drugs in the IV line. The infusion coupling includes a vessel body, and a plurality of branch inlets to receive medication through IV tubing connected to the inlets. The vessel body has a generally cylindrical shape such that each of the branch inlets is in fluidic communication with the interior volume for receiving the IV fluids for transport. The inlets are angled on the body of the infusion coupling. A transverse bar or obstruction extends across an interior diameter of the infusion coupling for disrupting a circular flow that can result in a vortex. Formation of a vortex can retain the infused medication in the infusion coupling and result in mixing with successive medication courses.