Normative data for the new setup of the SF6 multiple-breath washout in unsedated infants

Background: The multiple-breath washout (MBW) with 4% sulphur hexafluoride (SF₆) is a sensitive method to detect and monitor ventilation inhomogeneity (VI) in infancy. A new infant SF6 MBW methodology using currently available equipment was recently proposed. Aims: We compared lung clearance index (LCI) and functional residual capacity (FRC) outcomes in healthy infants from the new SF6 MBW technique with published...