Comment:

The pre‑bronchodilator FEVI, forced vital capacity and spirometric ratio are essentially normal although the raio is low for a young child

There is no significant response to acute bronchodilator therapy but the FEF25‑75 is mildly reduced before bronchodilator, and responds to dilator suggesting reversible airflow limitation. Static lung volumes show a mildly elevated functional residual capacity and severely increased residual volume.

Overall, the results are consistent with very mild airflow limitation with a degree of hyperinflation and gas trapping. On skin prick testing there was a positive response to house dust, house dust mite, timothy grass, rye grass and pea consistent with significant atopy.