AIRWAY SYSTEM, OPERATING MEHTOD THEREOF AND VENTILATOR OR ANESTHETIC MACHINE HAVING SUCH SYSTEM
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United States of America Patent
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Issued Date -
Jul 2, 2009
app pub date -
Dec 1, 2008
filing date -
Dec 28, 2007
priority date (Note) -
Abandoned
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Abstract
The present invention discloses an airway system and operating method thereof in the medical equipments such as a ventilator and an anesthetic machine. The airway system comprises: a respiratory circuit (2) comprising an inspiratory branch (21) and an expiratory branch (22); a control unit (1) connected to the respiratory circuit (2) for controlling the opening and closing of the inspiratory and expiratory branches; an airway pressure sensor (7) located in the respiratory circuit (2) for measuring the airway pressure, wherein an ambient pressure sensor (5) is also located in the respiratory circuit (2), and wherein in the normal operating mode, the ambient pressure sensor (5) is used to measure the ambient pressure, while when failures occur in the airway pressure sensor (7) it is used to roughly measure the airway pressure. The airway system and operating method thereof according to the present invention guarantee the stable and continuous operation of the respiratory system when the airway pressure sensor can not measure the airway pressure because of failures so that the safety of the patient is ensured.
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