Bioprinter Sterility and Scalability via Extraction
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Solution Overview
Problem
Current 3D bioprinting technologies face challenges in maintaining sterility during cartridge filling, handling, and installation, and lack scalable, repeatable, and cost-effective methods for fabricating 3D cell constructs that accurately reflect in vivo environments, limiting their application in drug discovery and personalized medicine.
Innovation Solution
A bioprinter system with holding reservoirs, a sample loading system, a pump, and a droplet dispensing system, integrated with a laminar air flow system and control units, allowing for precise loading and deposition of samples onto substrates while maintaining sterility and scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cartridges are used for loading substances into the printer, then the printer can be operated, but maintenance of sterility is challenging during cartridge filling, handling and installation
Solution Approach 1:
The patent extracts the sterile environment requirement from the cartridge handling process by implementing a closed system where the cartridge remains sealed within the printer housing. The sample loading system includes a needle that pierces the cartridge seal through a controlled mechanism, allowing sample transfer while maintaining the sterile barrier. This separates the sterile containment function from the operational convenience of cartridge removal.
Solution Approach 2:
The patent introduces an intermediary sterile barrier system consisting of seals and filtered air flow mechanisms. The housing creates a controlled atmosphere between the external environment and the internal cartridge, using filters and laminar flow to maintain sterility without requiring direct handling of the cartridge contents. This intermediary layer mediates between the need for easy operation and sterility maintenance.
2Productivity
If 3D bioprinting is used to fabricate cell constructs, then in vitro models can be created, but the process lacks scalability and repeatability
Solution Approach 1:
The patent segments the fabrication process into discrete, controllable steps: sample loading through sealed cartridges, precise droplet dispensing with controlled volume and positioning, and layer-by-layer construction. Each step is independently optimized and repeatable, allowing the overall process to be scaled while maintaining precision. The modular cartridge system enables parallel processing of multiple samples.
Solution Approach 2:
The patent implements feedback control through computer-controlled positioning systems that track droplet placement accuracy and adjust subsequent deposits accordingly. The system monitors and records parameters such as droplet volume, placement position, and layer thickness, enabling repeatability across multiple fabrication runs and facilitating process optimization for scaling.
3Ease of manufacture
If 2D cell culture is used, then simple plating onto surfaces is achieved, but cellular properties differ fundamentally from in vivo environments
Solution Approach 1:
The patent transitions from 2D cell culture to 3D construct fabrication by depositing droplets in multiple layers with controlled spatial positioning. The system builds three-dimensional architectures that replicate tissue organization, cell-cell interactions, and gradient formations found in vivo. This dimensional transition maintains ease of operation through automated deposition while dramatically improving model accuracy.
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 the fabrication of 3D cell constructs with improved sterility and scalability, enhancing the accuracy of in vitro models for drug discovery and personalized medicine by mimicking in vivo environments effectively.
Implementation Method 1
a pump in fluid communication with the sample loading system, the pump configured to draw the sample out of a sample container and pump the sample into the one or more holding reservoirs
Implementation Method 2
a droplet dispensing system in fluid communication with the one or more reservoirs, the droplet dispensing system configured to print sample droplets from the one or more reservoirs onto a substrate supported by the printstage
Implementation Method 3
an air flow system disposed in the housing, the air flow system configured to induce a laminar air flow within the housing
Data Source
AI summary
A bioprinter for fabricating three-dimensional (3D) cell constructs, the bioprinter comprising one or more holding reservoirs for holding a fluid sample; a printstage for holding a sample container and supporting a substrate on which a 3D cell construct is to be printed; a sample loading system in fluid communication with the one or more holding reservoirs, the sample loading system configured to load a sample from a sample container into the one or more holding reservoirs; a pump in fluid communication with the sample loading system, the pump configured to draw the sample out of a sample container and pump the sample into the one or more holding reservoirs; and a droplet dispensing system in fluid communication with the one or more reservoirs, the droplet dispensing system configured to print sample droplets from the one or more reservoirs onto a substrate supported by the printstage.