RT Journal Article
SR Electronic
T1 Validation of a portable lung volume testing system
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP P1994
VO 44
IS Suppl 58
A1 Victoria Batsford
A1 James Stockley
A1 Brendan Cooper
YR 2014
UL http://erj.ersjournals.com/content/44/Suppl_58/P1994.abstract
AB Aim: We wanted to validate the ndd Easy One Pro Lab Plus for static lung volumes using multiple breath nitrogen washout (MBW) technique, against standard helium dilution (HD) equipment.Method: We tested healthy volunteers (n=16) and routine respiratory patients (n=22) [Mean (SD) Age (years) 44.1 (17.8); Height (m) 1.66 (0.10); M:F 12:26) by both MBW (Easy One Pro Lab Plus, ndd, Zurich, Switzerland) and HD (Jaeger Masterscreen PFT, Hochburg, Germany) and compared Functional Residual Capacity (FRC), Residual Volume (RV) and Total Lung Capacity (TLC) using student's paired t-test and Bland & Altman (B&A) analysis.Results: There was no significant difference in TLC, FRC or RV between MBW and HD (Table 1).View this table:Lung Volumes measured by MBW and HDThe B&A analysis (Fig 1.) shows that the difference in RV was homoscedastic and not clinically significant. This was similar in FRC and RV (see table).Conclusion: There was no clinically significant difference (all <0.50 Litres) in FRC, RV or TLC when measured by MBW or HD methods. Sub-analysis of patients and healthy volunteers showed similar patterns (not shown).