Lung Bioreactor Pressure Control for Functional Airway Maturation
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Solution Overview
Problem
The long wait times and high mortality rates associated with lung transplants due to the unavailability of suitable donor organs necessitate the development of bioreactors that can generate and preserve functional lung tissue for transplantation.
Innovation Solution
The use of lung bioreactors equipped with an organ chamber, ingress and egress lines, a controller, and pressure sensors to facilitate fluid exchange and maturation of lung tissue through wet or dry ventilation, ensuring minimal tracheal pressure fluctuation and maintaining a constant fluid level, thereby producing functional lung organs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lung transplants are performed using donor organs, then patients can receive life-saving treatment, but wait times exceed two years and mortality rate reaches 30%
Solution Approach 1:
The patent applies preliminary action by maturing lung tissue in bioreactors before transplantation. The tissue is prepared in advance through controlled culture processes, allowing it to reach functional maturity prior to implantation. This eliminates the need to wait for donor organs and significantly reduces transplant wait times while maintaining high success rates.
2Productivity
If bioreactors are used to generate lung tissue, then wait time is reduced and functional organs can be produced, but device complexity increases
Solution Approach 1:
The bioreactor system is segmented into modular components including organ chambers, reservoir systems, and control units. Each module performs a specific function (e.g., tissue culture, fluid storage, parameter monitoring) and can be independently optimized or replaced. This modular architecture manages system complexity while maintaining high productivity in organ generation.
Solution Approach 2:
The bioreactor system is designed with multi-functional components that can perform multiple operations. For example, the same apparatus can culture different types of tissue, perform both wet and dry ventilation, and integrate monitoring and control functions. This universality reduces the need for multiple specialized devices, managing overall system complexity.
3Speed
If fluid exchange is increased to accelerate tissue maturation, then organ development speed increases, but tracheal pressure fluctuation increases
Solution Approach 1:
The system incorporates feedback control through pressure sensors that continuously monitor tracheal pressure during fluid exchange. When pressure fluctuations exceed predetermined thresholds, the control system automatically adjusts fluid flow rates and exchange parameters. This feedback mechanism maintains rapid tissue maturation while keeping pressure fluctuations within safe physiological limits.
4Reliability
If wet ventilation is used to promote tissue maturation, then organ development is enhanced, but fluid level stability becomes critical
Solution Approach 1:
The bioreactor system incorporates self-regulating mechanisms for fluid level maintenance. Level sensors detect fluid height in real-time and automatically trigger refilling or drainage operations to maintain optimal levels. This self-service approach ensures continuous stable fluid levels during wet ventilation, supporting reliable tissue maturation without manual intervention.
Data Source
AI summary
Presented is an airway organ bioreactor apparatus, and methods of use thereof, as well as bioartificial airway organs produced using the methods, and methods of treating subjects using the bioartificial airway organs. The bioreactor comprises: an organ chamber: an ingres line connecting the organ chamber and a reservoir system and comprising an arterial line, a venous line and a tracheal line; an egress line connecting the chamber and the reservoir system, pumps in ingress and egress lines; a controller to control fluid exchange; a chamber pressure sensor connected to the organ chamber.