[Detection of bronchial hyperreactivity using the 1-step histamine test].
An attempt was made to establish whether patients with, and those without, bronchial hyperreactivity can be reliably differentiated on the basis of a single-step histamine provocation test. Thirty-five asymptomatic persons (7 normal subjects, 13 patients with a history of coughing and oppressive sensation, and 13 patients with bronchial asthma) inhaled 10 breaths of a 5% histamine solution after a trial run with physiological NaCl solution. SGaw was determined in a volume constant body plethysmograph. The median dose of histamine was 0.51 mg, the sGaw median after inhalation was 0.37 kPa-1s-1. Between the values for sGaw prior to and following inhalation, and the histamine dose, a linear dose response curve was plotted, from which PD25sGaw was interpolated. On the basis of PD25sGaw, patients with bronchial hyperreactivity and normal subjects could be differentiated. At a PD25sGaw threshold value of 0.27 mg, the sensitivity is 0.85 and the specificity 0.86. Thus, the results obtained with single-step histamine provocation are comparable with those obtained with the conventional provocation methods involving increasing concentrations of histamine, and with those of the methacholine single-step provocation challenge.
Baltsch
J
J
Klinik Kurhessen, Abteilung für Innere Medizin, Bad Sooden-Allendorf.
Gonsior
E
E
D000403:Airway Resistance / Q000187:drug effects; D001249:Asthma / Q000175:diagnosis*; D001985:Bronchial Provocation Tests / Q000379:methods*; D006632:Histamine; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000175:diagnosis; D010993:Plethysmography, Whole Body; D012130:Respiratory Hypersensitivity / Q000175:diagnosis*
D006632:Histamine
Der Nachweis der bronchialen Hyperreagibilität mit dem Einstufen-Histamintest.