PT  - JOURNAL ARTICLE
AU  - Hmeidi, Hamza
AU  - Chadwick, Ed
AU  - Lenney, Warren
AU  - Gilchrist, Francis
AU  - Alexander, John
AU  - Wilson, Rachel
AU  - Motamedi-Fakr, Shayan
AU  - Iles, Richard
TI  - Non-invasive, non-contact measurement of tidal breathing parameters in children aged 3-17 years using structured light plethysmography (SLP)
AID  - 10.1183/13993003.congress-2015.PA3643
DP  - 2015 Sep 01
TA  - European Respiratory Journal
PG  - PA3643
VI  - 46
IP  - suppl 59
4099  - http://erj.ersjournals.com/content/46/suppl_59/PA3643.short
4100  - http://erj.ersjournals.com/content/46/suppl_59/PA3643.full
SO  - Eur Respir J2015 Sep 01; 46
AB  - Introduction: Measurement of lung function aids diagnosis and treatment of respiratory conditions, but spirometry is not possible in young children. SLP is a novel technique for measuring chest and abdominal wall movement during tidal breathing that would allow us to obtain measurements in patients where this is not currently possible.Aims: We investigated the use of SLP for measuring tidal breathing in children aged 3-17 years.Methods: Using a Thora-3Di™ (PneumaCare, Cambridge, UK), a structured light pattern was projected onto the chest and abdomen of a seated child. Movement with respiration is captured using stereo-photogrammetry to produce a trace of tidal breathing. Clinically-useful respiratory indices can be calculated such as respiratory rate (RR), inspiratory time ratio (Ti/Ttot) and ratio of inspiratory to expiratory flow at 50% of tidal movement (IE50). The relative contribution of chest wall movement to total movement (RC2Tot) can also be captured.Results: 44 children (22 female) aged 3-17 years underwent assessment with SLP. Normative data are summarized in the table below. View this table:Tidal breathing dataConclusion: We have demonstrated the feasibility of obtaining objective measures of tidal breathing using SLP in children.