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. Author manuscript; available in PMC: 2016 Apr 13.
Published in final edited form as: J Allergy Clin Immunol Pract. 2013 Jun 28;1(4):387–393. doi: 10.1016/j.jaip.2013.05.005

Figure 1. Pulmonary testing in normal volunteer.

Figure 1

21 yo normal volunteer. (A) At baseline. Frequency independent variability of impedance, Z5 with tidal volume is observed. R5–20 and X plots are smooth with low frequency dependent variability. Flow-volume loop is normal. (B) After exercise challenge. Expected increases in respiratory rate, tidal volume and Z5 variability, are seen otherwise other parameters remain unchanged.