Exposure Unit Groove Design for Gas-Phase Cell Culture

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Solution Overview

Problem

Existing gas-liquid interface culture methods struggle to maintain a suitable thickness of the liquid layer covering cells when exposing gas-phase substances, while preventing cell drying, which is crucial for effective substance interaction and observation.

Innovation Solution

An exposure unit with a base body featuring grooves and storage portions to retain cells and buffer solution, ensuring a constant liquid layer thickness and continuous supply to prevent drying, allowing for controlled exposure of gas-phase substances to cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the liquid layer thickness is reduced to enable gas-phase substance contact with cells, then the substance can effectively interact with cells, but the cells are at risk of drying out

Engineering Contradiction:
Improveliquid layer thicknessVSAvoidcell drying prevention
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The device is segmented into distinct functional zones: a cell culture region with controlled liquid layer thickness for gas-substance exposure, and a buffer solution storage region for maintaining cell hydration. This spatial segmentation allows simultaneous achievement of thin liquid layer for gas contact and sufficient buffer supply for drying prevention

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

A hydrophilic groove structure acts as an intermediary element between the cell culture area and buffer storage area. The groove's hydrophilic properties enable automatic buffer solution supply to the cell region while maintaining a controlled thin liquid layer, thus mediating between the conflicting requirements of thin layer exposure and adequate hydration

Inventive Principle:
Principle #24Intermediary (Mediator)

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 exposure unit effectively maintains a suitable liquid layer thickness, preventing cell drying and facilitating prolonged exposure and observation of gas-phase substance interactions with cells, enhancing the reliability and duration of cell response monitoring.

Implementation Method 1

a groove formed in the base body so as to be exposed to an outside and retaining the cell together with the buffer solution

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Implementation Method 2

the thickness of this liquid layer is a constant thickness in accordance with the configuration (for example, dimensions, hydrophilicity) of the groove

Methodology Applied
Scientific EffectHydrophilicity-driven flow: Hydrophile

Data Source

PatentUS20230272319A1Exposure unit, observation device, and exposure method
Publication Date: 2023.08.31 HAMAMATSU PHOTONICS KK
  • US20230272319A1 patent drawing
  • US20230272319A1 patent drawing
  • US20230272319A1 patent drawing

AI summary

An exposure unit is used in order to expose a gas-phase substance to a cell in a buffer solution. The exposure unit includes a base body. The base body has a groove formed in the base body so as to be exposed to an outside and retaining the cell together with the buffer solution, and a first storage portion connected to one end of the groove and storing the buffer solution to be supplied to the groove.