Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

A Low-Cost Air Flow Sensor/Transducer for Medical Applications: Design and Experimental Characterization

Version 1 : Received: 19 January 2021 / Approved: 20 January 2021 / Online: 20 January 2021 (16:14:23 CET)

How to cite: Calderón, J.; Rincón, C.; Agreda, B.; Calero, S.; Bornas, M.; Jiménez de Cisneros, J.J. A Low-Cost Air Flow Sensor/Transducer for Medical Applications: Design and Experimental Characterization. Preprints 2021, 2021010404 (doi: 10.20944/preprints202101.0404.v1). Calderón, J.; Rincón, C.; Agreda, B.; Calero, S.; Bornas, M.; Jiménez de Cisneros, J.J. A Low-Cost Air Flow Sensor/Transducer for Medical Applications: Design and Experimental Characterization. Preprints 2021, 2021010404 (doi: 10.20944/preprints202101.0404.v1).

Abstract

Mechanical ventilation systems, which are used for breathing support when a person is not able to do it by their own, requires a device for measuring the air flow to the patient in order to monitoring and a assure the magnitude establish by a medical staff. Flow sensors are the conventional devices used for the air flow measuring; however, there were not available in Peru, because of the international demand during COVID-19 pandemic. In this sense, a novel air flow sensor based on orifice plate and an intelligent transducer stage were developed as an integrated design. Advanced methodologies in simulations and experiments using specially designed equipment for this application were carried out. The obtained data was used for a mathematical characterization and dimensions validation of the integrated design. The device was tested in its real working conditions, it was implemented in a breathing circuit connected to a low-cost mechanical ventilation system based on cams. Results indicate that the designed air flow sensor/transducer is a low-cost complete medical device for mechanical ventilators able to provide satisfactorily all the ventilation parameters air flow, pressure and volume over time by measuring the air flow and calculating the others. Furthermore, this device provides directly a filtered equivalent electrical signal for a display or a computer.

Subject Areas

air flow medical sensor; emergency air flow sensor; low-cost air flow sensor; COVID-19

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