Closed Circuit Perfusion System for Organ Integrity
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Solution Overview
Problem
Current perfusion systems for organ explants do not maintain anatomic and functional tissue integrity for extended periods, as they often allow organs to set their own physiological flow rates, leading to deteriorating functional capacity and inefficient nutrient and waste disposal.
Innovation Solution
A novel perfusion system with an essentially closed circuit via circuit tubing provides a constant flow rate of nutrients and oxygen to organ explants for at least six hours, using two peristaltic pumps for bidirectional transport and fresh medium supply, ensuring optimal nutrient delivery and waste removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If organs are allowed to set their own physiological flow rates during perfusion, then the system operates with minimal external control, but the functional capacity of the organ continuously deteriorates and nutrient/waste exchange becomes inefficient
Solution Approach 1:
The system incorporates flow sensors that continuously monitor perfusate flow through the organ and provide feedback to the control unit. The control unit adjusts pump operation to maintain target flow rates, ensuring consistent nutrient delivery and waste removal while preventing functional deterioration that occurs with uncontrolled physiological flow variation
Solution Approach 2:
The organ itself contributes to flow regulation through its inherent physiological mechanisms - the organ's vascular resistance and pressure gradients naturally modulate flow distribution to match metabolic demands, reducing the need for complex external control while maintaining functional integrity
2Ease of operation
If perfusion flow rate is not externally controlled, then the system is simpler to operate, but nutrient supply and waste disposal become inefficient over time
Solution Approach 1:
Flow sensors monitor perfusate delivery and provide real-time feedback to the control unit, which automatically adjusts pump speed to maintain optimal flow rates for nutrient supply and waste removal, ensuring sustained productivity without requiring complex manual intervention
Solution Approach 2:
The system dynamically adjusts flow rate parameters based on organ metabolic activity and perfusion conditions, optimizing nutrient delivery efficiency while maintaining operational simplicity through automated parameter modulation rather than fixed manual settings
3Device complexity
If perfusion is performed without external flow control, then the apparatus requires fewer control mechanisms, but the organ's ability to dispose of metabolic waste components progressively deteriorates
Solution Approach 1:
The control system uses flow sensors to monitor perfusate circulation and automatically adjusts pump operation to maintain flow rates sufficient for effective waste removal, preventing the progressive deterioration of waste disposal capacity that occurs with uncontrolled perfusion while adding minimal complexity through automated feedback loops
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 system effectively preserves the anatomic and functional integrity of organ explants for prolonged periods, enabling improved research and therapeutic applications by maintaining physiological parameters and reducing cell damage markers.
Implementation Method 1
two peristaltic pumps for bidirectional transport and fresh medium supply
Data Source
Figure 1
Figure 2a~2c
Figure 3a~3c
AI summary
The present invention relates to a perfusion system for perfusing organ explants, i.e. transplantable organs or parts thereof, derived from patients, healthy organ donors or animal sources. The system components are integrated in an essentially closed circuit via circuit tubing for the provision of a constant flow rate, being supplied with nutrients and oxygen, to said explants for at least six hours. The system comprises a bowl (10) for supporting an explant, a vessel (11) for storing the perfusion medium reservoir, a circulation pump (12), an aquarium pump comprising an airstone (131) for measuring and controlling the oxygen concentration in said perfusion medium, and sampling means (141, 142) for collecting the perfusion medium and for applying nutrients. A second perfusion pump (20) may be provided to enable continuous influx of fresh perfusion medium.