The method of study is explained to all patients, and patient who do not express their consent in writing are not studied. If there are no prohibition factors for the patients based on the inclusion criteria and if there are no exclusion criteria, the sample size of the patients is randomly divided into two groups of case(120 member) and control(120 member). according to the severity of the asthma attack, they will undergo standard asthma treatment according to the reference book protocols . Patients with severe and severe moderate are treated with 2.5 mg inhaled albotrol and 0.5 mg inhalation ipratropium 0.5 mg with a 20 minute interval. Patients with severe onset of severe asthma received 5 mg inhalable albuterol and 0.5 mg inhalation epirubenol At intervals of 20 minutes, three non-vial doses. and 50 mg oral prednisolone are given.
In the experimental group, 1mg / kg of ketamine was inhaled in addition to the standard treatment mentioned in 1 doses of 0, minute, and measured PEFR and FEV1in all patients at 0, 20, 40, 60, and 90 minutes after the intervention, . Meanwhile, in the 60th minute, the clinical status of patients (according to Rosen 2014) based on clinical symptoms, the state of consciousness, speaking,HR , RR, , paradoxical rat, the use of accessory respiratory muscles, and wheezing are reassessed and evaluated. Clinical parameters, PEFR and FEV1 are measured before and after 0, 20, 40, 60, and 90 minutes. Respiratory rate, heart rate, blood pressure and oxygen saturation are also recorded. Finally, the difference between the two parameters is the two groups receiving the treatment and statistical analysis