In order to enable a medical worker to certainly and easily know whether a patient on a home oxygen therapy, who continues to inhale an oxygen-enriched gas at home, performs the inhalation as prescribed, a history of a supply condition of the oxygen-enriched gas supplied to the patient is recorded and...http://www.google.de/patents/US7740013?utm_source=gb-gplus-sharePatent US7740013 - Oxygen concentrating apparatus and execution support method of home oxygen therapy using the same
