alexa Assessment of a Low Cost Thin Film Bidirectional Airflow Probe for Pulmonary Applications | OMICS International | Abstract
ISSN: 2168-9652

Biochemistry & Physiology: Open Access
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Special Issue Article

Assessment of a Low Cost Thin Film Bidirectional Airflow Probe for Pulmonary Applications

Charles E. Forbes*, Robert E. Coifman and Stephen L. Monfre
Feather Sensors, LLC, 1122 North High Street, Millville, NJ 08332, USA
Corresponding Author : Charles E. Forbes
Feather Sensors, LLC, 1122 North High Street
Millville, NJ 08332, USA
Tel: 908-581-3166
Fax: 856-327-8030
E-mail: [email protected]
Received July 31, 2012; Accepted August 01, 2012; Published August 04, 2012
Citation: Forbes CE, Coifman RE, Monfre SL (2012) Assessment of a Low Cost Thin Film Bidirectional Airflow Probe for Pulmonary Applications. Biochem Physiol S1:001. doi:10.4172/2168-9652.S1-001
Copyright: © 2012 Forbes CE, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

As a device for measuring lung function in pulmonary medicine, we have developed a probe containing a strain gauge housed in a plastic form with two wires that connect to an audio jack, for communication with electronic equipment. This device is proposed as an alternative to sensors currently employed in instruments, such as spirometers and forced oscillation technique devices (FOT). The ruggedness and low cost of the probe make it suitable for personal monitoring devices. The physical properties of our sensor appears to be responsible for two classes of anomaly, in its ability to measure airflow. The first is polymer creep, for which we have developed a correction algorithm yielding a square wave voltage output to a square wave airflow input. The second anomaly is a “hump” in the voltage airflow curve that slightly lowers the accuracy at low flow rates. Other tests show minimal airflow resistance, promise for conformity to American Thoracic Society spirometry waveform standards, utility as a device for measuring bidirectional airflow, and promise for FOT applications. The probes have a simple form factor and are easily manufactured.

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