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Am. J. Respir. Crit. Care Med., Volume 162, Number 3, September 2000, 857-860

Efficacy and Safety of Methacholine Bronchial Challenge Performed by Auscultation in Young Asthmatic Children

CHAIM SPRINGER, SIMON GODFREY, ELIE PICARD, KAMAL UWYYED, MOSHE ROTSCHILD, SHAI HANANYA, NATAN NOVISKI, and AVRAHAM AVITAL

Institute of Pulmonology, Hadassah University Hospital and Hebrew University-Hadassah Medical School, Jerusalem, Israel

The measurement of bronchial reactivity is an important aid in the diagnosis of asthma, but the technique using spirometry is not feasible in young children. The aim of the present study was to determine the efficacy and safety of a modification of the chest auscultation method in the assessment of bronchial reactivity to inhaled methacholine in young asthmatic children. One hundred forty-six young children with asthma (mean age, 4.3 yr) underwent bronchial challenges with nebulized methacholine using the auscultation method (PCW). The end point was defined as the appearance of wheezing, oxygen desaturation, or tachypnea. For comparison, 30 children and young adults with asthma underwent bronchial provocation with methacholine using spirometry (PC20). A positive response using the auscultation method was observed in 95.9% of the younger children, and wheezes alone or in combination with other signs appeared in 80.8% of them. The mean desaturation at the end point was 4.6% (PCW) and 5.0% (PC20), with a similar pattern in the two groups. Cough was not helpful in determining the end point. We conclude that the modified auscultation method is effective and safe, with wheeze appearing at the end point in the large majority of the children.




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