Patient B., 35 years old, was taken to the clinic by an ambulance with complaints of tightness in the chest, shortness of breath, especially exhalation, and a painful cough. Sick for 10 years with bronchial asthma. Before that, he was observed for several years with a diagnosis of chronic bronchitis. For 5 years, he took Prednisolone 2 tablets per day and Berotek inhalation for breathlessness. Exacerbations of bronchial asthma 3-4 times a year, often requiring hospitalization. The present worsening of the condition is associated with the quitting of Prednisolone a week ago. Allergic anamnesis is nothing to note. A brief episode of painful cough precedes the exacerbations of severe dyspnea. At the end of the attack, it intensifies, and a small amount of viscous mucous bronchial discharge appears. Objectively: patient looks severely ill severe on examination; the patient's skin is pale, with a bluish tinge. The patient sits in the "orthopnea" position. A patient with increased body