title: The value of bronchodilator administration in asthmatic patients before lung imaging.
abstract: A 17-year-old boy with chest pain and severe bronchospasm underwent lung imaging to exclude pulmonary embolism. This showed widespread nonsegmental defects in both the ventilation and perfusion scans. A repeat study performed immediately after nebulized bronchodilator administration was normal apart from changes consistent with left lower lobe pneumonia and atelectasis which had subsequently evolved on the chest radiograph. Bronchodilator administration is valuable in improving the accuracy of lung scanning in asthmatic patients by reducing the perfusion and ventilation abnormalities caused by hypoxia-induced vasoconstriction.
authors.affiliation: Department of Radiology, Childrens Hospital, Boston, Massachusetts 02115, USA.
authors.forename: P J
authors.initials: PJ
authors.lastname: Roach
authors.forename: S T
authors.initials: ST
authors.lastname: Treves
mesh_terms: D000293:Adolescent; D001249:Asthma / Q000000981:diagnostic imaging* / Q000188:drug therapy*; D001980:Bronchi / Q000187:drug effects*; D001993:Bronchodilator Agents / Q000008:administration & dosage*; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008297:Male; D011652:Pulmonary Circulation / Q000187:drug effects; D011877:Radionuclide Imaging; D013668:Technetium Tc 99m Aggregated Albumin; D014980:Xenon Radioisotopes
chemical_list: D001993:Bronchodilator Agents; D013668:Technetium Tc 99m Aggregated Albumin; D014980:Xenon Radioisotopes