Blood Pump Medication Delivery via Pressure Monitoring
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Solution Overview
Problem
Dialysis patients require precise administration of liquid medications during extracorporeal blood treatments, and existing systems lack efficient methods for monitoring and controlling medication delivery, leading to potential overdoses and administrative challenges.
Innovation Solution
A blood treatment device with a pump, control device, and pressure sensors that connect a medication container to an extracorporeal circuit, allowing for real-time monitoring and calculation of medication volume and time required for administration, using check valves and pressure differences to manage medication flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate medication pump is added to the extracorporeal blood treatment device, then the precision of medication delivery is improved, but the device complexity and cost increase
Solution Approach 1:
The existing blood pump in the extracorporeal circuit is made to perform dual functions: pumping blood and delivering medication. The pump can switch between blood pumping mode and medication delivery mode, eliminating the need for a separate medication pump while maintaining precise delivery capability through the same pumping mechanism
Solution Approach 2:
The medication delivery system is merged with the existing blood pump and control system. The control device manages both blood flow and medication delivery parameters, integrating multiple functions into a single coordinated system rather than using separate dedicated components
2Device complexity
If manual medication administration is used, then the device complexity is reduced, but the risk of human error and administrative burden increase
Solution Approach 1:
Pressure sensors provide real-time feedback on medication delivery status, and the control device monitors and adjusts delivery parameters automatically. This closed-loop control ensures accurate medication administration without manual intervention, eliminating human error while maintaining system simplicity
Solution Approach 2:
The system performs self-monitoring and self-regulation of medication delivery. The control device automatically manages the pumping parameters, pressure monitoring, and delivery timing without requiring manual operation, making the system reliable while keeping the physical structure simple
3Measurement precision
If pressure sensors are added to monitor medication delivery, then the measurement precision of medication volume is improved, but the device complexity increases
Solution Approach 1:
Pressure sensors already present in the extracorporeal circuit for blood pressure monitoring are made to serve dual purposes: monitoring blood pressure and measuring medication delivery volume. The same pressure signals are used for both functions, eliminating the need for separate measurement sensors
Solution Approach 2:
The medication volume measurement function is merged with the existing pressure monitoring system. The control device processes pressure signals to calculate both blood pressure parameters and medication delivery volume, combining multiple measurement functions into a single integrated system
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
Ensures accurate and reliable administration of medications without the need for additional pumps, reducing human error and administrative burden, while maintaining low complexity and cost.
Implementation Method 1
a pressure sensor for determining the pressure in the first or second section
Implementation Method 2
The inlet line is connected in fluid communication to a first section of the extracorporeal circuit. The outlet line is connected in fluid communication to a second section of the extracorporeal circuit
Data Source
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AI summary
The invention relates to a method for determining a parameter of a supply of a fluid medicine into a line of an extracorporeal circuit (2000), which is connected to a blood treatment device (3000) for the purpose of a blood treatment of a patient, comprising the step of providing a blood treatment device (3000) having a pump, for example a blood pump (4000), connected to an extracorporeal circuit (2000), wherein the extracorporeal circuit (2000) at least has a medicine container (31) with a fluid medicine, a connection device (27) for connecting the medicine container (31) to the extracorporeal circuit (2000), wherein the connection device (27) has an inlet line (27e) and and outlet line (27a) for respectively connecting an inside of the medicine container (31) to the inside of the line of the extracorporeal circuit (2000), wherein the inlet line (27e) is fluidically connected to a first section of the extracorporeal circuit (2000), and wherein the outlet line (27a) is fluidically connected to a second section of the extracorporeal circuit (2000), said method also comprising the step of determining the parameter which is an amount or a volume of an already applied medicine, or a required remaining time until the complete administration of a predetermined amount or a predetermined volume of the medicine. The invention also relates to a corresponding device.