A method of preventing the formation of dangerous underpressure in a respiratory system,, which comprises a respirator (1) connected to the patient, and a sampling device (11) and a gas analyzer (3) connected thereto, in which method inspired and expired air is aspirated at a predetermined pressure for...http://www.google.com/patents/US5873361?utm_source=gb-gplus-sharePatent US5873361 - Method of preventing the formation of a dangerous underpressure in a respiratory system