Structured Cell Growth Matrix for Uniform Bioreactor Flow

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Solution Overview

Problem

Existing bioreactors with non-structured cell growth matrices face issues of reproducibility, non-homogeneous cell culture environments, difficulty in determining cell culture surface, laborious packing, and high costs due to variable carrier sizes and shapes, leading to uneven nutrient and oxygen distribution and reduced cell production rates.

Innovation Solution

A structured cell growth matrix assembly with alternating spacer and immobilization layers, creating a tortuous path for cell and medium flow, ensuring homogeneous distribution and efficient nutrient delivery, while minimizing pressure drop and facilitating easy packing and scalability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If non-structured cell growth matrixes with variable carrier sizes and shapes are used, then flexibility in material selection is improved, but manufacturing precision and reproducibility deteriorate due to variable sizes and shapes causing non-homogeneous packing

Engineering Contradiction:

Improvematerial selection flexibilityVSAvoidpacking homogeneity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent applies homogeneity by using carriers with uniform size, shape, and density characteristics. All carriers are spherical with identical diameter (0.5-2mm), ensuring homogeneous packing and consistent flow distribution throughout the bioreactor, eliminating the non-homogeneous environments caused by variable carrier dimensions

Inventive Principle:

Principle #33Homogeneity

Solution Approach 2:

The patent changes the physical parameters of carriers to standardized values - spherical shape, uniform diameter (0.5-2mm), and controlled density (0.8-1.2g/cm³). This parameter standardization transforms the system from variable to controlled, enabling reproducible packing and homogeneous cell culture environments while maintaining material versatility through different polymer compositions

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If non-structured cell growth matrixes are used, then ease of manufacture is improved, but device complexity increases due to the need for internal or external circulation mechanisms to achieve homogeneous medium distribution

Engineering Contradiction:

Improvematrix production simplicityVSAvoidcirculation mechanism complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent implements self-service by designing a system where the standardized carriers themselves create the homogeneous flow distribution through their uniform packing structure. The regular geometry and consistent size distribution enable natural, uniform flow patterns without requiring complex internal or external circulation mechanisms, allowing the matrix to serve its own flow distribution function

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If carriers with variable sizes and shapes are used, then adaptability in cell growth surface area is improved, but productivity deteriorates due to non-homogeneous nutrient and oxygen distribution reducing cell production rate

Engineering Contradiction:

Improvecell growth surface areaVSAvoidcell production rate

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #33Homogeneity

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

4Ease of operation

If non-structured cell growth matrixes are used, then ease of operation is improved, but measurement precision deteriorates as the cell culture surface cannot be determined with precision

Engineering Contradiction:

Improveoperation simplicityVSAvoidcell culture surface determination

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP4700112A2Cell growth matrix

Publication Date: 2026.02.25 UNIVERCELLS SA

Figure 1A~1B
Figure 2A~2D
Figure 3A~3B

AI summary

The invention provides a structured cell growth matrix or assembly comprising a one or more spacer layers and one or more cell immobilization layers. The invention further provides a bioreactor comprising said matrix or assembly.