ECO MEDICS presented the pulmonary function testing devices, ANALYZER CLD 88 and EXHALYZER®D at the GPP congress, which was held in Bern (Switzerland) from September 28-30. Many scientific contributions reported studies, which have been performed with the ANALYZER CLD 88 and EXHALYZER®D and it was emphasized that the lung clearance index (LCI) derived from multiple breath washout (MBW) tests is more sensitive than the spirometry-derived FEV1.