Blood Circuit Type Detection via Pressure Measurement
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Solution Overview
Problem
Existing extracorporeal blood treatment systems face challenges in accurately and efficiently detecting the type of blood circuit connected to the console, which can lead to inappropriate operational settings being used for patients, potentially causing harm.
Innovation Solution
A system comprising a pump and controller that uses a priming liquid to determine the dimensional characteristics of the blood passage, such as diameter, by measuring pressure changes, and generates signals to indicate whether the circuit is for an adult or pediatric patient, ensuring proper settings are applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual setting selection is used, then operator control is maintained, but risk of incorrect settings increases
Solution Approach 1:
The system automatically detects blood circuit type and configures operational settings without requiring operator intervention. The console performs self-identification of the connected blood circuit type through automated sensing and configuration, eliminating manual selection and preventing human error in settings configuration.
2Measurement precision
If automated detection is implemented, then accuracy of settings improves, but system complexity increases
Solution Approach 1:
The system uses hydraulic principles by pumping liquid through the blood circuit and measuring pressure changes to detect circuit type. This approach achieves accurate automated detection using simple pressure measurements and liquid pumping, avoiding complex electronic sensors or identification systems while maintaining high measurement precision.
3Measurement precision
If pressure measurement method is used, then detection accuracy improves, but priming time increases
Solution Approach 1:
The system performs pressure measurements and dimensional characteristic detections during the priming process itself, before patient connection. By integrating the detection function into the existing priming sequence, the system achieves accurate blood circuit verification without adding separate time-consuming measurement steps.
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 method allows for automatic recognition and verification of the blood circuit type, preventing accidental use of inappropriate settings and ensuring safe and effective blood treatment.
Implementation Method 1
measuring pressure changes
Data Source
AI summary
A method to determine a type of blood circuit attached to an extracorporeal blood treatment console including: pumping a liquid through a blood passage of the blood circuit, sensing a first pressure in: the blood passage while the passage is closed and pumping stopped, pumping an additional amount of the liquid into the blood passage while the blood passage is and remains closed and thereafter sensing a second pressure, and determine a dimensional characteristic of a fluid passage in the blood passage based on the additional amount of the liquid and the second pressure.