Chemical Liquid Injector Preliminary Valve Opening
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Solution Overview
Problem
Chemical liquid injectors face delays due to unidirectional valve operations and kinks in the chemical liquid circuit, which affect the smooth injection of contrast media and physiological saline during medical imaging procedures.
Innovation Solution
A chemical liquid injector with a control unit that executes an injection preliminary operation to open unidirectional valves and address kinks, followed by a main injection, using a driving mechanism to apply pressure and a mixing device to enhance the flow of contrast media and physiological saline, ensuring efficient and responsive injection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a unidirectional valve is used in the chemical liquid circuit to prevent backflow, then the reliability of chemical liquid injection is improved, but the injection speed is reduced due to valve operation delays
Solution Approach 1:
The control unit executes a preliminary operation before the main injection to open the unidirectional valve and eliminate kinks in advance. This preliminary action ensures that the valve is fully open and the circuit is clear before the actual injection begins, preventing delays during the injection process while maintaining the reliability benefits of using a unidirectional valve.
2Productivity
If pressure is applied to open the unidirectional valve, then the injection flow is improved, but the time required for valve operation increases
Solution Approach 1:
The control unit applies pressure to open the unidirectional valve during a preliminary operation phase before the main injection. By performing this valve opening action in advance, the system ensures rapid valve response during the actual injection without adding delay to the overall injection process.
Solution Approach 2:
The control unit executes the preliminary operation at a specific timing before the main injection, creating a periodic sequence where the valve is opened in advance and then maintains open state during injection. This timing-based approach optimizes both valve operation speed and injection flow.
3Adaptability or versatility
If the chemical liquid circuit is long to reach deep blood vessels, then the adaptability of the injector is improved, but the likelihood of kink generation increases
Solution Approach 1:
The control unit performs a preliminary operation that includes applying pressure to eliminate kinks in the chemical liquid circuit before the main injection. This preliminary action ensures that even long circuits used for deep blood vessel access are free of kinks, maintaining circuit integrity and reliability while preserving adaptability to various injection depths.
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 solution prevents delays and kinks, ensuring a smooth and efficient injection process, improving the contrast effect and reducing the time required for injection, thereby enhancing medical imaging outcomes.
Implementation Method 1
a driving mechanism which applies a pressure to a chemical liquid in a container, and pushes out the chemical liquid
Data Source
AI summary
A chemical liquid injector including a driving mechanism which applies a pressure to a chemical liquid in a container and pushes out the chemical liquid, and an injection control unit for setting operating conditions of the driving mechanism. The control unit has a main-injection condition determination section which determines injection conditions for a main injection, and an injection preliminary operation condition determination section which determines injection conditions for an injection preliminary operation, and is configured to execute the injection preliminary operation and the main injection consecutively in this order when injecting chemical liquid.