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Related Experiment Video

Updated: Sep 18, 2025

Author Spotlight: Advancing Human Cardiac Anatomy Through Multi-Scale Analysis of Hearts

Author Spotlight: Advancing Human Cardiac Anatomy Through Multi-Scale Analysis of Hearts

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Adding the 'heart' to hanging drop networks for microphysiological multi-tissue experiments.

Saeed Rismani Yazdi¹, Amir Shadmani, Sebastian C Bürgel

¹ETH Zurich, Department of Biosystems Science and Engineering, Bio Engineering Laboratory, Mattenstrasse 26, CH-4058 Basel, Switzerland. olivier.frey@bsse.ethz.ch.

|September 25, 2015

Summary

This summary is machine-generated.

This study presents a novel microfluidic pump for controlling fluid flow in hanging-drop networks, enabling advanced multi-tissue models. This technology facilitates organ-on-a-chip research by simulating physiological conditions and inter-tissue communication.

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Area of Science:

Bioengineering
Microfluidics
Tissue Engineering

Background:

Microfluidic hanging-drop networks are crucial for culturing 3D microtissues and studying inter-tissue communication.
Existing flow control methods can be complex and limit parallel processing capabilities.

Purpose of the Study:

To introduce a compact, on-chip pumping approach for precise flow control in microfluidic hanging-drop networks.
To demonstrate the system's capability for parallel operation and closed-loop medium circulation in multi-tissue formats.

Main Methods:

Development of a pneumatic pumping system utilizing surface tension at the liquid-air interface for flow actuation.
Implementation of pneumatic protocols for generating diverse flow profiles (pulsatile, continuous).
Integration of a real-time feedback control loop based on cardiac microtissue beating for physiological simulation.

Main Results:

The proposed pump allows high-fidelity, parallel operation of multiple independent hanging-drop networks using a single actuation line.
Demonstrated closed-loop medium circulation between different organ models for multi-tissue assays.
Successful real-time feedback control of pump actuation synchronized with cardiac microtissue function.

Conclusions:

The developed microfluidic pump offers a versatile and efficient solution for advanced organ-on-a-chip systems.
This technology enhances the ability to simulate complex physiological interactions and test drug responses in multi-tissue models.
Enables sophisticated studies of inter-organ communication and disease modeling on a chip.