Impaired gas exchange associated with asthma can be attributed to alveolar-capillary membrane changes brought on by obstructive lung disease and can produce various subjective findings .Subjective findings include shortness of breath,vision changes,a headache when waking up,and a sense of impending doom.Objective findings include restlessness or irritability,sluggishness,confusion,altered breathing,tachycardia,diaphoresis,and abnormal ABGs,indicating hypoxemia.Assess the patient for factors that contribute to the impairment,improve or correct the deficiencies,and promote wellness by advising the patient how to decrease risk and prevent declining lung function.Close monitoring is warranted,depending on the degree of severity. Complete functional assessment measurements as prescribed,and report any abnormal levels promptly to the HCP. Administer supplemental oxygen as indicated.Administer medications as prescribed. Avoid central nervous system depressants in periods of acute asthma exacerbation. Preferred outcomes for the patient include improved ventilation and oxygenation as well as diminished respirator distress.