The utility of hand-held mobile spirometer technology in a resource-constrained setting

The utility of hand-held mobile spirometer technology in a resource-constrained setting

BACKGROUND: Mobile phone-linked spirometry technology has been designed specifically for evaluating lung function at primary care level. The Air-Smart Spirometer is the first mobile spirometer accepted in Europe for the screening of patients with chronic respiratory diseases OBJECTIVES: To prospectively assess the accuracy of the device in measuring forced expiratory volume in the first second (FEV1) and forced vital capacity (FVC) in a South African population, and to investigate the ability of the device to detect obstructive ventilatory impairment METHODS: A total of 200 participants were randomly assigned to perform spirometry with either the mobile spirometer connected to a smartphone or the desktop spirometer first, followed by the other. The FEV1/FVC ratio as well as the absolute FEV1 and FVC measurements were compared, using each participant as their own control. A Pearson correlation and Bland-Altman analysis were performed to measure the agreement between the two devices. We defined obstructive ventilatory impairment as FEV1/FVC <0.7 measured by desktop spirometry in order to calculate the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the Air-Smart Spirometer RESULTS: There was a strong correlation between the absolute FEV1 and FVC values and FEV1/FVC ratio measured with the mobile AirSmart Spirometer and more conventional pulmonary function testing, with r=0.951, r=0.955 and r=0.898, respectively. The Air-Smart Spirometer had a sensitivity of 97.6%, specificity of 74.4%, PPV of 73.0% and NPV of 97.8% for obstructive ventilatory impairment CONCLUSIONS: The mobile Air-Smart Spirometer compared well with conventional spirometry, making it an attractive and potentially affordable tool for screening purposes in a primary care setting. Moreover, it had a high sensitivity and NPV for obstructive ventilatory impairment

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Main Authors: du Plessis,E, Swart,F, Maree,D, Heydenreich,J, van Heerden,J, Esterhuizen,T M, Irusen,E M, Koegelenberg,C F N
Format: Digital revista
Language:English
Published: South African Medical Association 2019
Online Access:http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0256-95742019000400011
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spelling oai:scielo:S0256-957420190004000112019-04-17The utility of hand-held mobile spirometer technology in a resource-constrained settingdu Plessis,ESwart,FMaree,DHeydenreich,Jvan Heerden,JEsterhuizen,T MIrusen,E MKoegelenberg,C F NBACKGROUND: Mobile phone-linked spirometry technology has been designed specifically for evaluating lung function at primary care level. The Air-Smart Spirometer is the first mobile spirometer accepted in Europe for the screening of patients with chronic respiratory diseases OBJECTIVES: To prospectively assess the accuracy of the device in measuring forced expiratory volume in the first second (FEV1) and forced vital capacity (FVC) in a South African population, and to investigate the ability of the device to detect obstructive ventilatory impairment METHODS: A total of 200 participants were randomly assigned to perform spirometry with either the mobile spirometer connected to a smartphone or the desktop spirometer first, followed by the other. The FEV1/FVC ratio as well as the absolute FEV1 and FVC measurements were compared, using each participant as their own control. A Pearson correlation and Bland-Altman analysis were performed to measure the agreement between the two devices. We defined obstructive ventilatory impairment as FEV1/FVC <0.7 measured by desktop spirometry in order to calculate the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the Air-Smart Spirometer RESULTS: There was a strong correlation between the absolute FEV1 and FVC values and FEV1/FVC ratio measured with the mobile AirSmart Spirometer and more conventional pulmonary function testing, with r=0.951, r=0.955 and r=0.898, respectively. The Air-Smart Spirometer had a sensitivity of 97.6%, specificity of 74.4%, PPV of 73.0% and NPV of 97.8% for obstructive ventilatory impairment CONCLUSIONS: The mobile Air-Smart Spirometer compared well with conventional spirometry, making it an attractive and potentially affordable tool for screening purposes in a primary care setting. Moreover, it had a high sensitivity and NPV for obstructive ventilatory impairmentSouth African Medical AssociationSAMJ: South African Medical Journal v.109 n.4 20192019-04-01journal articletext/htmlhttp://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0256-95742019000400011en
institution SCIELO
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country Sudáfrica
countrycode ZA
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libraryname SciELO
language English
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author du Plessis,E
Swart,F
Maree,D
Heydenreich,J
van Heerden,J
Esterhuizen,T M
Irusen,E M
Koegelenberg,C F N
spellingShingle du Plessis,E
Swart,F
Maree,D
Heydenreich,J
van Heerden,J
Esterhuizen,T M
Irusen,E M
Koegelenberg,C F N
The utility of hand-held mobile spirometer technology in a resource-constrained setting
author_facet du Plessis,E
Swart,F
Maree,D
Heydenreich,J
van Heerden,J
Esterhuizen,T M
Irusen,E M
Koegelenberg,C F N
author_sort du Plessis,E
title The utility of hand-held mobile spirometer technology in a resource-constrained setting
title_short The utility of hand-held mobile spirometer technology in a resource-constrained setting
title_full The utility of hand-held mobile spirometer technology in a resource-constrained setting
title_fullStr The utility of hand-held mobile spirometer technology in a resource-constrained setting
title_full_unstemmed The utility of hand-held mobile spirometer technology in a resource-constrained setting
title_sort utility of hand-held mobile spirometer technology in a resource-constrained setting
description BACKGROUND: Mobile phone-linked spirometry technology has been designed specifically for evaluating lung function at primary care level. The Air-Smart Spirometer is the first mobile spirometer accepted in Europe for the screening of patients with chronic respiratory diseases OBJECTIVES: To prospectively assess the accuracy of the device in measuring forced expiratory volume in the first second (FEV1) and forced vital capacity (FVC) in a South African population, and to investigate the ability of the device to detect obstructive ventilatory impairment METHODS: A total of 200 participants were randomly assigned to perform spirometry with either the mobile spirometer connected to a smartphone or the desktop spirometer first, followed by the other. The FEV1/FVC ratio as well as the absolute FEV1 and FVC measurements were compared, using each participant as their own control. A Pearson correlation and Bland-Altman analysis were performed to measure the agreement between the two devices. We defined obstructive ventilatory impairment as FEV1/FVC <0.7 measured by desktop spirometry in order to calculate the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of the Air-Smart Spirometer RESULTS: There was a strong correlation between the absolute FEV1 and FVC values and FEV1/FVC ratio measured with the mobile AirSmart Spirometer and more conventional pulmonary function testing, with r=0.951, r=0.955 and r=0.898, respectively. The Air-Smart Spirometer had a sensitivity of 97.6%, specificity of 74.4%, PPV of 73.0% and NPV of 97.8% for obstructive ventilatory impairment CONCLUSIONS: The mobile Air-Smart Spirometer compared well with conventional spirometry, making it an attractive and potentially affordable tool for screening purposes in a primary care setting. Moreover, it had a high sensitivity and NPV for obstructive ventilatory impairment
publisher South African Medical Association
publishDate 2019
url http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0256-95742019000400011
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