Inspiratory airway pressure system

A - Human Necessities – 61 – M

Patent

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A61M 16/00 (2006.01)

Patent

CA 2206784

An apparatus and method for facilitating the respiration of a patient are disclosed which are particularly useful in treating mixed and obstructive sleep apnea and certain cardiovascular conditions, among others, by increasing nasal air pressure delivered to the patient's respiratory passages just prior to inhalation and by subsequently decreasing the pressure to ease exhalation effort. The preferred apparatus includes a patient-coupled gas delivery device for pressurizing the patient's nasal passages at a controllable pressure, and a controller coupled with the delivery device having a pressure transducer for monitoring the nasal pressure and a microcontroller for selectively controlling the nasal pressure. In operation, the controller determines a point in the patient breathing cycle just prior to inhalation and initiates an increase in nasal pressure at that point in order to stimulate normal inhalation, and subsequently lowers the nasal pressure to ease exhalation efforts.

Appareil et méthode facilitant la respiration d'un patient, particulièrement utiles dans le traitement de l'apnée du sommeil mixte et obstructive et de certains états cardiovasculaires, entre autres, en augmentant la pression d'air nasal dans les voies respiratoires du patient juste avant l'inhalation et en la diminuant ensuite pour faciliter l'effort d'expiration. L'appareil préféré comprend un dispositif de livraison de gaz couplé au patient, qui pressurise les voies nasales du patient à une pression contrôlable, ainsi qu'un régulateur couplé à un dispositif de livraison muni d'un transducteur de pression permettant de surveiller la pression nasale, et d'un microrégulateur permettant le contrôle sélectif de la pression nasale. Lorsque l'appareil fonctionne, le régulateur détermine un point précis du cycle respiratoire du -patient précédant immédiatement l'inhalation où amorcer une augmentation de la pression nasale afin de stimuler l'inhalation normale, et abaisse ensuite la pression nasale pour faciliter l'effort d'expiration.

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