Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học 'Respiratory Research cung cấp cho các bạn kiến thức về ngành y đề tài:" Comparison of exhaled breath condensate pH using two commercially available devices in healthy controls, asthma and COPD patients. | Respiratory Research BioMed Central Open Access Comparison of exhaled breath condensate pH using two commercially available devices in healthy controls asthma and COPD patients Rembert Koczulla1 2 Silvano Dragonieri1 Robert Schot1 Robert Bals2 Stefanie A Gauw1 Claus Vogelmeier2 Klaus F Rabe1 Peter J Sterk1 3 and Pieter S Hiemstra 1 Address Department of Pulmonology Leiden University Medical Center the Netherlands 2Department of Pulmonology Philipps University Marburg Germany and 3Department of Respiratory Medicine Academic Medical Center Amsterdam the Netherlands Email Rembert Koczulla - rembertkoczulla@ Silvano Dragonieri - Robert Schot - Robert Bals - bals@ Stefanie A Gauw - Claus Vogelmeier - Klaus F Rabe - Peter J Sterk - Pieter S Hiemstra - Corresponding author Published 24 August 2009 Received 9 December 2008 Respiratory Research 2009 10 78 doi 1465-9921-10-78 Accepted 24 August 2009 This article is available from http content 10 1 78 2009 Koczulla et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background Analysis of exhaled breath condensate EBC is a non-invasive method for studying the acidity pH of airway secretions in patients with inflammatory lung diseases. Aim To assess the reproducibility of EBC pH for two commercially available devices portable RTube and non-portable ECoScreen in healthy controls patients with asthma or COPD and subjects suffering from an acute cold with lower-airway symptoms. In addition we assessed the repeatability in healthy controls. Methods EBC was collected .