Blood Pump and Compressed Air Device Control for Bubble Trap Safety
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Solution Overview
Problem
Existing blood treatment apparatuses lack effective control mechanisms to ensure safe and regulated operation of blood pumps and compressed air devices, potentially leading to excessive venous flow rates and unintended air supply into the bubble trap.
Innovation Solution
A control device that independently regulates both the blood pump and the compressed air device, ensuring that the venous flow rate does not exceed the blood flow rate set for the blood pump, and preventing unintended air supply by automatically closing clamps during unthrottled compressed air conveyance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the compressed air device operates independently without coordination with the blood pump, then the compressed air device can function freely, but the venous flow rate may exceed the blood pump flow rate causing safety issues
Solution Approach 1:
The patent merges the control of the compressed air device and blood pump into a single integrated control device that coordinates their operations. The control device receives signals from both devices and generates coordinated control signals, ensuring the compressed air device only operates when the blood pump is running and maintaining proper flow rate relationships.
Solution Approach 2:
The control device implements feedback mechanisms by receiving operational signals from both the compressed air device and blood pump, then adjusting control signals accordingly. This feedback loop ensures that the venous flow rate never exceeds the blood pump flow rate and prevents air supply when the blood pump is not operating.
2Productivity
If the compressed air device conveys air without coordination, then air can be supplied to the bubble trap, but unintended air infusion may occur into the patient
Solution Approach 1:
The control device checks whether the blood pump is operating before allowing the compressed air device to convey air. This preliminary verification prevents air infusion into the patient by ensuring the blood pump is running and the venous line is properly established before air enters the system.
Solution Approach 2:
The control device continuously monitors the operational status of the blood pump and uses this feedback to control the compressed air device. When the blood pump stops or encounters an error, the control device immediately stops air conveyance, preventing harmful air infusion into the patient.
3Reliability
If the control device regulates both blood pump and compressed air device, then patient safety is improved, but the control system becomes more complex
Solution Approach 1:
The control device is designed as a universal controller that handles multiple functions: regulating the blood pump, controlling the compressed air device, monitoring operational status, and preventing safety hazards. This multi-functional approach consolidates what could be separate complex systems into a single coordinated controller.
Solution Approach 2:
The patent combines the control functions for the blood pump and compressed air device into a single integrated control device. This merging reduces overall system complexity by eliminating the need for separate independent control systems while maintaining comprehensive safety regulation.
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 control device enhances patient safety by preventing excessive blood flow rates and unintended air infusion, thereby ensuring reliable operation of the blood treatment apparatus and protecting both the patient and the blood tubing set.
Implementation Method 1
The compressed air device (1003) is provided and/or suitable for generating pressure and/or an air flow within the compressed air line (1005)
Implementation Method 2
a blood pump configured to convey blood all the way through a blood tubing set
Data Source
AI summary
The present disclosure relates to a control device for controlling a blood treatment apparatus when the blood treatment apparatus comprises a compressed air line, a compressed air device being in fluid communication with the compressed air line, a blood pump for conveying blood in a blood tubing set, as well as an arterial patient tube clamp and a venous patient tube clamp. In this, the compressed air device is provided and/or suitable for generating pressure and air flow within the compressed air line. The blood tubing set comprises a venous bubble trap. The control device is configured in order to control or regulate both the blood pump and the compressed air device. The control device is further configured to convey using the blood pump depending on, or as a function of, a conveyance by the compressed air device and/or vice versa.