Vascular Catheter Flashback Chamber Flow Control
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Solution Overview
Problem
Current vascular access systems lack efficient control over blood flow rate, location, duration, and visualization, and do not provide continuous verification of proper device position within the patient's vasculature.
Innovation Solution
The system includes a catheter assembly with a septum and flow grooves that allow for controlled fluid flow, featuring a retention construct and structure to temporarily retain the septum, enabling visualization and customizable flow rates through the use of flow grooves and ridges, ensuring proper placement and minimizing blood spillage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an over-the-needle catheter is inserted into a blood vessel, then vascular access is established, but uncontrolled blood flow and potential bleeding occur
Solution Approach 1:
The catheter assembly is pre-configured with a flashback chamber and flow control features before insertion. The internal construct with flow grooves is already in place to regulate blood flow, preventing uncontrolled bleeding from occurring in the first place
Solution Approach 2:
The flashback chamber serves as an intermediary component between the blood vessel and the external environment. It captures and controls blood flow temporarily, allowing visualization of proper placement while preventing uncontrolled blood flow and bleeding
2Object-generated harmful factors
If the catheter assembly is designed with flow control features, then blood flow is controlled, but device complexity increases
Solution Approach 1:
The catheter assembly is segmented into functional zones: the flashback chamber for visualization, the internal construct with flow grooves for flow regulation, and the catheter body for fluid delivery. Each segment performs a specific function, allowing complex flow control through modular design
Solution Approach 2:
The internal construct utilizes thin-walled structures with integrated flow grooves that provide flow control functionality without adding significant bulk or rigidity. The flexible design allows the structure to maintain its function while minimizing impact on overall device simplicity
3Measurement precision
If a flashback chamber is provided for visualization, then proper placement is confirmed, but the chamber may fill with blood causing uncontrolled flow
Solution Approach 1:
The internal construct is designed to dynamically respond to blood flow conditions. The flow grooves and chamber geometry allow the structure to adapt to varying blood pressures and flow rates, providing controlled visualization while preventing overfilling and uncontrolled flow
Solution Approach 2:
The flashback chamber design incorporates specific geometric parameters (volume, opening size, flow groove dimensions) that are optimized to allow sufficient blood entry for visualization while limiting excessive flow. The chamber fills to a controlled level rather than allowing uncontrolled blood flow
Data Source
AI summary
An extravascular system (10) for accessing the vasculature of a patient may includes a catheter assembly (12) and an internal construct (14) within the catheter assembly, At least one fluid flow space may exist between the internal construct and the catheter assembly.