[Simplified methods of expiratory hydrogen (H2) analysis--clinical testing of two H2 breath test devices].

Clinical application of two devices available for breath hydrogen (H2) analysis in the gastroenterologist's or hospital practice was investigated. Breath H2 analysis by gaschromatography was used as reference method. Apparatus A was inadequate for measurements of H2 concentrations in endexpiratory air. With the second apparatus (B) valid measurements were obtained. Both, sensitivity and precision suggest that this device may be an alternative for gaschromatographic H2 analysis which will be suitable for the clinical and practising gastroenterologist's purposes.