Intravascular Catheter Septum Vent Geometries for Compression Compensation
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Solution Overview
Problem
Current catheter placement methods often result in undesirable blood exposure and reduced ability to confirm proper catheter placement due to uncontrolled flashback and positive pressure from IV tubing, making it difficult for clinicians to verify correct placement.
Innovation Solution
A catheter assembly with a septum device that includes various vent geometries to compensate for compression forces, featuring a chamfered distal portion and inner surface vents to provide controlled flashback while preventing blood exposure, allowing for fluid communication between chambers and maintaining pressure equilibrium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the catheter adapter is attached to IV tubing prior to catheter placement, then blood exposure is prevented, but flashback is blocked and catheter placement verification is reduced
Solution Approach 1:
The catheter adapter is divided into separate chambers (first chamber for flashback, second chamber for IV connection) with a septum between them. This segmentation allows the flashback chamber to remain accessible for verification while the IV connection chamber is sealed, preventing blood exposure during setup.
Solution Approach 2:
A septum acts as an intermediary barrier between the flashback chamber and the IV tubing connection chamber. The septum can be pierced to allow fluid communication when needed, while maintaining separation when not in use, thus enabling both blood exposure prevention and flashback verification.
2Object-affected harmful factors
If the clinician manually occludes the vein to prevent blood exposure, then blood exposure is reduced, but the process becomes cumbersome and time-consuming
Solution Approach 1:
The catheter adapter design with sealed chambers and controlled septum piercing allows the system to self-regulate blood exposure prevention without requiring continuous manual vein occlusion. The structure itself provides the protective function, freeing the clinician from the cumbersome manual occlusion task.
3Object-affected harmful factors
If positive pressure is applied from IV tubing to the catheter, then blood exposure is prevented, but flashback is inhibited and placement confirmation is reduced
Solution Approach 1:
By segmenting the adapter into separate chambers with the septum as a controlled interface, positive pressure from IV tubing is contained in the second chamber and cannot disrupt the flashback chamber. This maintains pressure equilibrium in the flashback chamber while still preventing blood exposure through the sealed design.
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
Enables controlled and desirable flashback without blood exposure, allowing clinicians to confirm proper catheter placement while minimizing the risk of blood exposure and ensuring accurate placement verification.
Implementation Method 1
a vent is provided between the chamfered portion and the inner surface of the intravascular device
Implementation Method 2
various vent geometries to compensate for compression forces experienced by the septum in an assembled intravascular device
Data Source
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AI summary
A system and method for providing vent channel geometries to compensate for compression forces experienced by a septum within an intravascular device.