Method and apparatus for providing positive airway pressure...

A - Human Necessities – 61 – M

Patent

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A61M 16/00 (2006.01)

Patent

CA 2323455

A system including methods and apparatus for treatment of a medical disorder such as obstructive sleep apnea or congestive heart failure. The system involves applying separate and independent gains (24) to flow rates of pressurized gas delivered to a patient (12) during inspiratory, expiratory phases of a respiratory cycle to deliver the pressurized gas in proportion to the respective gains during inspiration and expiration. A base pressure profile may be employed to assist or control inspiration. The system may be fully automated responsive to feedback provided by a flow sensor (22) that determines the estimated patient flow rate. A leak computer (32) can be included to instantaneously calculate gas leakage from the system. The system may be utilized in connection with conventional continuous positive airway pressure (bi-level PAP) equipment to effect various beneficial treatment applications.

L'invention concerne un système comprenant des procédés et un appareil destinés à traiter un trouble d'ordre médical, par exemple l'apnée obstructive du sommeil ou l'insuffisance cardiaque globale. Le système de cette invention consiste à appliquer des gains séparés indépendants (24) aux débits d'un gaz sous pression administré à un patient (12), au cours des phases inspiratoire et expiratoire d'un cycle respiratoire, de manière à administrer une quantité de gaz sous pression proportionnelle aux gains respectifs pendant l'inspiration et l'expiration. Un profil de pression de départ peut en outre être utilisé pour favoriser ou réguler l'inspiration. Ce système peut être entièrement automatisé en réponse à la rétroaction fournie par un capteur de flux (22), destiné à déterminer approximativement le débit du patient. Un système de détection des fuites (32) peut par ailleurs servir à calculer instantanément toute fuite de gaz provenant du système. Ce système peut enfin être utilisé en association avec un équipement de pression positive expiratoire continue traditionnel (PAP à deux niveaux) conçu pour appliquer différents traitements bénéfiques.

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