Blood Purification Apparatus with Bidirectional Pumping
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Solution Overview
Problem
Conventional blood purification apparatuses require complex configurations and multiple needle insertions, leading to increased burden on patients and medical workers, and higher blood loss due to needle displacement.
Innovation Solution
A simplified blood purification apparatus design featuring a blood purifier with semi-permeable membranes, bidirectional fluid pumping, and open-close valves in vascular access and drainage flow paths, allowing for blood removal and return processes without forming a loop, thereby minimizing blood loss and needle insertion burden.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a loop configuration with artery-side and vein-side blood circuits is used, then blood purification function is maintained, but device complexity and needle insertion burden increase
Solution Approach 1:
The invention extracts the vein-side puncture needle and vein-side blood circuit from the conventional loop configuration. By removing this component, the apparatus simplifies the blood circuit to only require artery-side needle insertion, thereby reducing patient burden and medical worker workload while maintaining the essential blood purification function through alternative fluid pathways.
Solution Approach 2:
The cleaning solution flow path is designed to serve multiple functions: it acts as a substitute for the removed vein-side blood circuit to maintain blood purification, serves as a fluid replacement pathway, and provides a route for blood pump bidirectional operation. This multi-functionality allows the apparatus to achieve blood purification with simplified configuration.
2Ease of operation
If multiple puncture needles are inserted for loop configuration, then blood circulation is maintained, but patient and medical worker burden increases
Solution Approach 1:
The invention removes the vein-side puncture needle from the system, reducing needle insertion from two sites to one. This extraction eliminates the need for vein access while maintaining blood purification through the cleaning solution flow path, thereby reducing both operational burden and blood loss risk.
Solution Approach 2:
The cleaning solution flow path acts as an intermediary system that compensates for the removed vein-side circuit. By introducing this intermediate fluid pathway with bidirectional pumping capability, the system maintains blood purification function without requiring vein-side needle insertion, thus reducing blood loss and operational complexity.
3Reliability
If vein-side puncture needle is used in loop configuration, then blood return is enabled, but displacement causes blood loss
Solution Approach 1:
The invention extracts the vein-side puncture needle that is prone to displacement and blood loss. By removing this vulnerable component and replacing its function with the cleaning solution flow path and bidirectional blood pump, the system eliminates the blood loss risk associated with needle displacement while simplifying the overall blood circuit configuration.
Solution Approach 2:
The bidirectional blood pump in the cleaning solution flow path provides feedback control capability, allowing the system to monitor and adjust fluid flow direction and pressure. This feedback mechanism ensures reliable blood purification and fluid management without relying on the vulnerable vein-side needle, thereby suppressing blood loss while maintaining functional reliability.
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 apparatus effectively suppresses blood loss during needle displacement and simplifies the configuration, reducing patient and medical worker burden while maintaining efficient blood purification.
Implementation Method 1
a blood purifier (110), having an inner portion divided by a semi-permeable membrane (111) into a first portion (10) and a second portion (11)
Data Source
AI summary
A blood purification apparatus that includes a blood purifier, a vascular access flow path, a cleaning solution flow path, and a drainage flow path. The blood purifier has an inner portion divided by a semi-permeable membrane into a first portion and a second portion. The vascular access flow path is connected to the blood purifier and is in communication with the first portion. The cleaning solution flow path is connected to the blood purifier and is in communication with the first portion. The drainage flow path is connected to the blood purifier and is in communication with the second portion. The cleaning solution flow path is provided with a blood pump capable of bidirectionally feeding a fluid. An open-close valve is provided in each of the vascular access flow path and the drainage flow path.