Extract
Analysis of tidal breathing flow–volume (TBFV) curves is a convenient method to assess lung function in infants. We have shown that impedance pneumography (IP) is a valid method to assess overnight TBFV profiles in young children [1] and infants [2] and that certain specific curve shapes are related to symptom presentation and asthma risk [3]. We have also shown that the reduced variability of TBFV curves may be an indicator of airway obstruction in children [4–6]. However, in infants, it is unknown whether overnight TBFV variability is associated with respiratory symptoms or asthma risk.
Abstract
Impedance pneumography enables the measurement of the expiratory variability index (EVI) at home during a night's sleep in infants with recurrent respiratory symptoms. EVI is associated with asthma risk, symptoms and lung function. https://bit.ly/2PF2cx8
Acknowledgments
We acknowledge Prof. Seppo Sarna, Helsinki University Hospital, Helsinki, Finland for advice regarding statistical reporting.
Footnotes
Support statement: This study was supported by Tampereen Tuberkuloosisäätiö, Suomen Kulttuurirahasto, the Foundation for Allergy Research, Lastentautien Tutkimussäätiö, Tekes, Helsinki University Hospital Research Funds and Sigrid Juséliuksen Säätiö. Funding information for this article has been deposited with the Crossref Funder Registry.
Conflict of interest: V-P. Seppä reports three patents with royalties paid to Revenio Group Inc. and is an employee of Revenio Group Inc., which commercialises impedance pneumography technology.
Conflict of interest: J. Gracia Tabuenca has nothing to disclose.
Conflict of interest: A. Kotaniemi-Syrjänen has nothing to disclose.
Conflict of interest: K. Malmström has nothing to disclose.
Conflict of interest: A. Hult is an employee of Revenio Group Inc., which commercialises impedance pneumography technology.
Conflict of interest: A.S. Pelkonen has nothing to disclose.
Conflict of interest: M.J. Mäkelä has nothing to disclose.
Conflict of interest: J. Viik has three patents with royalties paid to Revenio Group Inc.
Conflict of interest: L.P. Malmberg has nothing to disclose.
- Received April 3, 2020.
- Accepted August 5, 2020.
- Copyright ©ERS 2020
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