Blood Purification Pump Layout for Faster Priming and Discharge
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Solution Overview
Problem
Conventional blood purification devices face limitations in increasing the speed of priming or discharge of replacement solution due to the balance with the pressure (suction force) of the water removal pump.
Innovation Solution
A blood purification device with a separate liquid discharge pump that can be driven independently from the liquid supply pump, allowing for the connection of the blood circuit and effluent discharge flow path to perform suction and discharge operations, thereby bypassing the dialyzer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a water removal pump is used to suction the blood circuit for priming or discharge, then the configuration remains simple, but the speed of priming or discharge is limited due to pressure balance constraints
Solution Approach 1:
The pump system is segmented into two independent pumps: a liquid supply pump for supplying dialysate and a liquid discharge pump for discharging effluent and performing priming/discharge operations. This segmentation allows each pump to be optimized for its specific function, enabling faster priming and discharge speeds without compromising the simplicity of the overall configuration.
Solution Approach 2:
The liquid discharge pump is designed to perform multiple functions: discharging effluent from the dialyzer and performing priming operations by suctioning the blood circuit. This multi-functionality eliminates the need for separate dedicated pumps, maintaining configuration simplicity while achieving high-speed priming and discharge operations.
2Productivity
If the liquid discharge pump is provided separately and driven independently, then the speed of priming or discharge can be increased, but the device complexity increases
Solution Approach 1:
The liquid discharge pump is designed to perform multiple functions: discharging effluent from the dialyzer and performing priming operations by suctioning the blood circuit. This multi-functionality eliminates the need for separate dedicated pumps, maintaining configuration simplicity while achieving high-speed priming and discharge operations.
Solution Approach 2:
The priming function and effluent discharge function are merged into a single liquid discharge pump system. By combining these functions into one pump unit that can operate independently, the system achieves faster priming and discharge speeds without requiring additional separate pump components.
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
Enables rapid priming and discharge of replacement solution with a simple configuration, eliminating the need for additional high-pressure pumps and enhancing the efficiency of the process.
Implementation Method 1
a liquid discharge pump that is arranged on the effluent discharge flow path, is provided separately and can be driven independently from the liquid supply pump, and causes pressure for discharge from the blood purifier to be applied to the effluent
Implementation Method 2
a liquid in the blood circuit is suctioned into the effluent discharge flow path by driving the liquid discharge pump
Data Source
AI summary
A blood purification device to purify blood of a patient through a blood purifier includes a blood circuit to circulate the blood through the blood purifier, a dialysate supply flow path to supply dialysate to the blood purifier, an effluent discharge flow path to discharge effluent from the blood purifier, a liquid supply pump to cause pressure for supply to the blood purifier to be applied to the dialysate, and a liquid discharge pump that causes pressure for discharge from the blood purifier to be applied to the effluent. A liquid in the blood circuit is suctioned into the effluent discharge flow path by driving the liquid discharge pump in a state in which the blood circuit and the effluent discharge flow path are connected in a manner that allows for liquid feeding through the blood purifier.