<s>[INST] i Just had a spirometry test with results of prebronchldilator revealing severe obstruction with fev1 of 35% of predicted or 1.18 liters. fev1/fvc ration is 51% erv is 62% oximetry is 92% . spirometry reveals severe obstruction fev1 increased from 35% to 43% and fef25-75% increased from 17% to 30%. What does all this mean? [/INST] Hello and welcome in HCMThis result mean that actually you have a low lung function.After the prove with bronchodilatators the lung volumes are relatively improved which means that you probably may benefit from  their use.Your doctor will probably prescribed them.Take careDr.Jolanda </s>