Sliding Septum Structure for Reliable Catheter Blood Flashback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current intravenous catheter placement methods rely on visual confirmation of blood flashback, which can be unreliable and may not ensure accurate positioning within the vasculature.
Innovation Solution
A septum device with a housing and a sliding hollow body that transitions between closed and open positions, allowing fluid flow through holes when open, and featuring seals and cam elements to ensure secure positioning and fluid management, facilitating accurate catheter placement and blood collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual confirmation of blood flashback is used to verify catheter placement, then the placement verification process is simple, but the reliability of placement confirmation is insufficient
Solution Approach 1:
A blood collection device with a collection chamber and indicator mechanism serves as an intermediary between the catheter tip and the user's visual observation. Blood flows into the collection chamber through a needle, and the indicator (such as a movable plunger or color-changing element) provides amplified visual confirmation of blood presence, making the verification process more reliable while keeping the overall system integrated and manageable.
2Manufacturing precision
If a needle is used to pierce skin and vasculature for catheter insertion, then catheter placement is achieved, but the risk of inaccurate positioning and failed placement increases
Solution Approach 1:
The invention replaces the traditional direct visual inspection method with a mechanical indicator system. A needle connected to a collection chamber mechanically transfers blood presence to an observable indicator (such as a plunger that moves or a vial that fills), providing more precise feedback on needle tip positioning within the vasculature, thereby improving placement precision while maintaining ease of operation through automatic mechanical indication.
3Measurement precision
If traditional blood flashback method is used, then the procedure is quick, but the accuracy of vasculature entry confirmation is insufficient
Solution Approach 1:
The invention transitions from direct visual observation of blood flashback (two-dimensional visual field) to a three-dimensional collection chamber system with indicators that provide spatial and visual amplification. Blood collects in a defined chamber space, and indicators such as movable plunger elements or vial fill levels provide enhanced spatial confirmation of blood presence, improving detection precision without significantly increasing verification time due to the integrated, automatic nature of the mechanism.
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
The septum device enhances the reliability of intravenous catheter placement by ensuring proper positioning and fluid management, improving the accuracy and efficiency of blood withdrawal and infusion procedures.
Implementation Method 1
The septum may include a spring, which may be disposed within the housing. In some embodiments, the spring may bias the second cam element proximally against the first cam element.
Data Source
AI summary
A septum may include a housing and a hollow body that slides with respect to the housing from a closed position to an open position. The hollow body may include one or more holes. The septum may include a first seal coupled to the distal end and a second seal coupled to the proximal end. In response to the hollow body being in the closed position, the second seal may block a proximal opening of the housing, and the holes may be disposed within the housing. In response to the hollow body sliding from the closed position to the open position, the holes may be disposed distal to the housing, and the second seal may be removed from the proximal opening of the housing such that fluid may flow proximally into the plurality of holes and through the proximal opening of the housing.