Nasal continuous positive airway pressure device and system

A - Human Necessities – 61 – M

Patent

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A61M 16/00 (2006.01)

Patent

CA 2631808

An nCPAP device including a generator body defining first and second fluid flow circuits each including a tube and first and second nozzles. The tube defines a passageway forming an axial centerline. The first and second nozzles are associated with the tube and each defines an inlet and an outlet. The inlets are open to a fluid supply, whereas the outlets are open to the passageway. Each nozzle is adapted to emit a fluid jetstream from the outlet along a flow direction axis. The nozzles are arranged such that the flow direction axes are non-parallel relative to each other and relative to the axial centerline. This configuration readily induces vortex shedding during an expiratory phase, thus facilitating jet fluid flow disruption and reducing a patient's work of breathing.

L'invention concerne un dispositif d'apport de pression positive continue aux voies nasales qui comprend un corps générateur définissant un premier et un deuxième circuit d'écoulement de fluide, chaque circuit comprenant un tube et une première et une deuxième buse. Le tube définit un passage formant une ligne centrale axiale. Les première et deuxième buses sont associées au tube et définissent chacune une entrée et une sortie. Les entrées sont reliées à une alimentation en fluide, et les sorties au passage. Chaque buse est conçue pour produire un jet de fluide depuis la sortie suivant un axe de direction d'écoulement. Les buses sont placées de sorte que les axes de direction d'écoulement ne sont ni parallèles entre eux, ni par rapport à la ligne centrale axiale. Cette configuration induit aisément un décollement de tourbillon pendant la phase expiratoire, ce qui facilite l'interruption du jet de fluide et permet de réduire le travail respiratoire du patient.

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