METHOD FOR DIAGNOSING HYPERCAPNIA IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASES

摘要

A method for diagnosing hypercapnia in the patients with the chronic obstructive pulmonary diseases comprises the assay for end-expiratory CO2 concentration and the fraction of the ventilation of the dead space in the total respiratory volume. When end-expiratory CO2 concentration is more than 5.5 % or when end-expiratory CO2 concentration is within 4.5-5.5 % with simultaneously increased fraction of the ventilation of the dead space in the total respiratory volume to 40 % and more, the hypercapnia is diagnosed.