Measurement of bronchial hyperreactivity: comparison of three Nordic dosimetric methods

Clinical testing of bronchial hyperreactivity (BHR) provides valuable information in asthma diagnostics. Nevertheless, the test results depend to a great extent on the testing procedure: test substance, apparatus and protocol. In Nordic countries, three protocols predominate in the testing field: Pe...

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Published in:SCANDINAVIAN JOURNAL OF CLINICAL & LABORATORY INVESTIGATION Vol. 80; no. 3; pp. 222 - 229
Main Authors: Lassmann-Klee, Paul G., Sundblad, Britt-Marie, Malmberg, Leo P., Sovijärvi, Anssi R. A., Piirilä, Päivi
Format: Journal Article Publication
Language:English
Published: England Taylor & Francis 02.04.2020
Subjects:
asthma
Histamine
methacholine
provocative dose
response-dose slope
Histamine
asthma
methacholine
response–dose slope
provocative dose
ISSN:0036-5513, 1502-7686, 1502-7686
Online Access:Get full text
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Summary:Clinical testing of bronchial hyperreactivity (BHR) provides valuable information in asthma diagnostics. Nevertheless, the test results depend to a great extent on the testing procedure: test substance, apparatus and protocol. In Nordic countries, three protocols predominate in the testing field: Per Malmberg, Nieminen and Sovijärvi methods. However, knowledge of their equivalence is limited. We aimed to find equivalent provocative doses (PD) to obtain similar bronchoconstrictive responses for the three protocols. We recruited 31 patients with suspected asthma and health care workers and performed BHR testing with methacholine according to Malmberg and Nieminen methods, and with histamine according to Sovijärvi. We obtained the individual response-dose slopes for each method and predicted equivalent PD values. Applying a mixed-model, we found significant differences in the mean (standard error of mean) response-dose (forced expiratory volume in one second (FEV 1 )%/mg): Sovijärvi 7.2 (1.5), Nieminen 13.8 (4.2) and Malmberg 26 (7.3). We found that the earlier reported cut-point values for moderate BHR and marked BHR between the Sovijärvi (PD 15 ) and Nieminen (PD 20 ) methods were similar, but with the Malmberg method a significant bronchoconstrictive reaction was measured with lower PD 20 values. We obtained a relationship between slope values and PD (mg) between different methods, useful in epidemiological research and clinical practice.
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ISSN:0036-5513
1502-7686
1502-7686
DOI:10.1080/00365513.2020.1719541