1. A method for monitoring an asthma patient to determine decreased ability to perceive severe respiratory distress, comprising: measuring the patient's respiration vital capacity for establishing controlled patient tidal volume; measuring the patient's respiration maximal inspiratory pressure capacity for establishing controlled patient inspiratory resistive load; establishing visual patient inspiration and expiration breathing pattern comprising determined tidal volume, respiratory rate, inspiration to expiration time ratio, and inspiration and expiration waveforms; applying external inspiratory flow resistance determined from maximal inspiratory pressure while maintaining substantially controlled patient respiration; and evaluating patient dyspnea subjective perception response to said inspiratory flow resistance under conditions of controlled breathing to determine patient dyspnea perception to severe or potentially fatal asthma attack due to the patient's inability to perceive asthma severity.