Blood Purification Device Liquid Level Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional blood purification devices face challenges in priming, as high liquid level heights in the gas-liquid separator increase the amount of blood extracorporeally circulated during treatment, making the process complicated and inefficient.
Innovation Solution
A blood purification device equipped with a liquid level adjustment unit that includes sensors and a mechanism to control the liquid level height in the gas-liquid separator, allowing for higher levels during priming and lower levels during treatment, thereby reducing blood circulation and simplifying the priming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the liquid level height in the gas-liquid separator is set to high during priming, then the gas-liquid separator is cleaned to the upper part, but the amount of blood to be extracorporeally circulated during treatment is increased
Solution Approach 1:
The liquid level in the gas-liquid separator is made dynamically adjustable between a first liquid level (high) during priming and a second liquid level (low) during treatment. The liquid level adjustment mechanism allows the system to transition between these states, optimizing the liquid level for each operational phase rather than maintaining a fixed level.
Solution Approach 2:
The system changes the liquid level parameter in the gas-liquid separator based on operational mode. During priming, the liquid level is raised to the first level to ensure thorough cleaning. During treatment, it is lowered to the second level to reduce blood circulation volume. This parameter change resolves the contradiction between cleaning effectiveness and blood circulation volume.
2Ease of manufacture
If the liquid level height in the gas-liquid separator is set to high, then the gas-liquid separator is cleaned effectively, but the priming work becomes complicated
Solution Approach 1:
The liquid level adjustment mechanism enables dynamic adaptation to different operational requirements. During priming, the system automatically adjusts the liquid level to the first level, eliminating the need for manual manipulation or complex procedures. This dynamic adjustment simplifies priming work while maintaining effective cleaning.
Solution Approach 2:
The liquid level adjustment mechanism operates automatically based on operational mode detection, eliminating the need for manual intervention during priming. The system self-regulates the liquid level to optimize cleaning effectiveness without complicating the priming procedure through manual operations.
3Quantity of substance
If the liquid level height in the gas-liquid separator is lowered during treatment, then the amount of blood extracorporeally circulated is reduced, but the gas-liquid separator cleaning is insufficient
Solution Approach 1:
The system dynamically adjusts the liquid level based on operational phase. During treatment, the liquid level is lowered to the second level to minimize blood circulation volume. During priming, it is raised to the first level to ensure adequate cleaning. This dynamic behavior allows the system to optimize both parameters for their respective operational contexts.
Solution Approach 2:
The system performs preliminary cleaning action during the priming phase by raising the liquid level to the first level, ensuring the gas-liquid separator is thoroughly cleaned before treatment begins. This preliminary action prepares the system for efficient treatment operation with reduced blood circulation volume.
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 solution effectively suppresses the increase in blood extracorporeally circulated during treatment, enhances cleaning efficiency during priming, and reduces the amount of physiological saline solution used during blood return, facilitating a more efficient and automated priming process.
Implementation Method 1
a liquid level adjustment mechanism that can adjust the liquid level height by introducing air into the gas-liquid separator or discharging air from the gas-liquid separator
Implementation Method 2
a first liquid level detection sensor that is provided at a first height position of the gas-liquid separator and that detects whether a gas is present at the first height position inside the gas-liquid separator
Data Source
AI summary
A blood purification device includes a blood circuit for extracorporeally circulating blood of a patient: a blood purifier provided on the blood circuit; a gas-liquid separator being provided on the blood circuit on the downstream side of the blood purifier on a blood flow and separating air bubbles contained in inflowing blood: and a liquid level adjustment unit capable of adjusting a liquid level height in the gas-liquid separator. The liquid level adjustment unit performs control so that the liquid level height during priming is higher than the liquid level height during treatment.