title: A new method of expired gas collection for the measurement of breath hydrogen (H2) in infants and small children.
abstract: The measurement of hydrogen (H2) in breath is becoming increasingly useful as a diagnostic and research tool, but there is still no satisfactory method of sampling expired air in infants and small children. We tested a modified open-flow hood method where the child's head is put in a perspex box and expired air is collected by sucking air from the box by means of an air pump. Comparison of this method with end-expiratory sampling by a modified Haldane-Priestly and nasopharyngeal catheter gave a correlation coefficient of 0.83 and 0.65, respectively. We conclude that expired air sampling in children with this method is a more satisfactory and as reliable a method as any available at present, and has the added advantage of being quantitative.
authors: Department of Physiology, Chinese University, Hong Kong, Shatin.
authors: K
authors: K
authors: Tadesse
authors: D T
authors: DT
authors: Leung
authors: S P
authors: SP
authors: Lau
mesh_terms: D001944:Breath Tests / Q000379:methods*; D002675:Child, Preschool; D005260:Female; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D013048:Specimen Handling / Q000379:methods
chemical_list: D006859:Hydrogen