Dictionary of Allergies .. Astograph

A device with which it is possible to measure the continuous changes of respiratory resistance during bronchial inhalation challenge in adults. This method, however, is not suitable for younger children because of wide variations in respiratory resistance.

Reference

Mochizuki H, Mitsuhashi M, Tokuyama K, Tajima K, Morikawa A, Kuroume T. A new method of estimating bronchial hyper-responsiveness in younger children. Ann Allergy. 1985 Aug;55(2):162-6.