Identification of different respiratory rate by a piezo polymer based nasal sensor

Author

Manjunatha, Roopa G. ; Ranjith, N. ; Meghashree, Y.V. ; Rajanna, K. ; Mahapatra, D.R.

Author_Institution

Dept. of Instrum. & Appl. Phys., Indian Inst. of Sci. (IISc), Bangalore, India

fYear

2013

fDate

3-6 Nov. 2013

Firstpage

1

Lastpage

4

Abstract

In this paper, we present a new nasal sensor system developed using Polyvinylidene fluoride (PVDF) piezo polymer in cantilever configuration and its applicability for measuring human Respiration Rate (RR). Two identical PVDF nasal sensors are mounted on a headphone such that they are located below Right Nostril (RN) and Left Nostril (LN), in such a way that the nasal airflow during inspiration and expiration impinge on sensors. Due to nasal airflow, piezoelectric natured PVDF nasal sensors generate corresponding voltage signals. The RR is the number of breaths per minute (bpm). The RR was determined from the filtered respiratory signals, by computing a power spectral density (PSD) spectrum using Welch method of averaged periodograms. The developed PVDF nasal sensors were capable of identifying different RR corresponding to normal (18.5±1.5 bpm), tachypnea (34.5±4 bpm), and bradypnea (10.5±2.2 bpm) similar to `Gold standard´ Respiratory Inductance Plethysmograph (RIP) method and Nasal Prongs (NP).

Keywords

biomedical equipment; medical disorders; piezoelectric devices; pneumodynamics; polymers; PVDF piezo polymer; Welch method; averaged periodograms; bradypnea; cantilever configuration; expiration; headphone; human respiration rate; identical PVDF nasal sensors; inspiration; nasal airflow; piezo polymer based nasal sensor; polyvinylidene fluoride; power spectral density spectrum; respiratory rate identification; tachypnea; voltage signals; Acoustic measurements; Biomedical monitoring; Gold; Inductance; Monitoring; Polymers; Standards; Nasal Prongs; Polyvinylidene fluoride (PVDF); Respiration rate; Respiratory Inductance Plethysmograph; breathing type;

fLanguage

English

Publisher

ieee

Conference_Titel

SENSORS, 2013 IEEE

Conference_Location

Baltimore, MD

ISSN

1930-0395

Type

conf

DOI

10.1109/ICSENS.2013.6688479

Filename

6688479