Estudio de la hiperrespuesta bronquial a la metacolina mediante la auscultación traqueal en niños sanos menores de 4 años

As a means for assessing bronchial hyperresponsiveness, the tracheal auscultation method is appropriate, is simple to apply, and can be safely administered to unsedated children aged less than 4 years. The lowest concentration at which a response to methacholine occurs in healthy children of this age group is 8 mg/mL.