Minimal Universal Respirator

In this post, we highlight the creation of a low-cost and easily reproducible emergency respiration device, designed with minimum material and using components accessible to many people worldwide. This is called a Minimal Universal Respirator, or MUR.

Resuscitation doctors have validated the design, and it is being tested in collaboration with the AP-HP hospitals in Paris, France. The design is still in an early stage and the developers are calling for contributors to add the missing skills.

Minimal Universal Respirator

The goal is to develop an easy to use, efficient and intuitive minimal universal respirator

Following the above statement, the design has inexpensive components and only a few parts. It is easy to reproduce and to deploy. Any air source powerful enough will do to provide respiratory help. It must be possible to regulate the airflow precisely, to assure there is no risk to the patient.

Available settings of the device:

  • – Number of cycles per minute (respiration rate)
  • – Inhalation / exhalation ratio
  • – Peak pressure (in cm H2O)
  • – Plateau pressure (in cm H2O)
  • – Expiratory pressure (in cm H2O)

Click here to see a demo video of the settings.

Bill of Materials:

  • – (4x) 3D printed valves (3 closed-loop and one manual)
  • – (3x) actuators (simple standard actuators)
  • – (1x) barometric sensor (pressure)
  • – (1x) physical control box (with 5 potentiometers)
  • – (1x) alarm and safety system to monitor patient status (peak pressure alarm and plateau alarm) and expiratory pressure (in cm H2O)
  • – (1x) physical control box (with 5 potentiometers)
  • – (1x) electronic board to control the whole (any type of Arduino)
  • – (1x) activated carbon air filtration system
  • – (1x) 5V stabilized power supply
  • – (1x) blower

The developers took their inspiration for the design of the device from this document in French language. There is also a training available.

The project is Open-Source under the GPLv3 license and the design files are available on GitHub.

The development team invites you to take part in the project. You can do so by visiting the source page for this article and click the button “I can help” at the bottom.

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