Table 4– Examples of predicted functional residual capacity (FRC) measured by multiple-breath washout (MBW) and the upper limit of normal (ULN) for FRCMBW according to height and sex
Height cmMalesFemales
Predicted FRCMBW LULN for FRCMBW LPredicted FRCMBW LULN for FRCMBW L
550.0850.1230.0820.119
600.1070.1540.1030.149
650.1320.1890.1280.184
700.1620.2320.1580.226
800.2370.3380.2290.327
1000.4630.6600.4470.636
1100.6220.8850.5980.851
1200.8161.1610.7841.115
1401.3391.9031.2761.814
1602.0242.8741.9662.792
  • To take age into account, results have been calculated by using the age at which the quoted values for height represent the 50th centile. Thus, 70 cm represents the 50th centile for height at 0.64 years in males but 0.75 years in females, whereas 160 cm represents the 50th centile for height at 13.7 years in boys but 14.1 years in females [21].