Inhalation/exhalation respiratory phase detection circuit

Details Inhalation/exhalation respiratory phase detection circuit Inhalation/exhalation respiratory phase detection circuit

A - Human Necessities

61

B

A61B 5/087 (2006.01) A61M 16/00 (2006.01) A61M 16/20 (2006.01) H03K 5/08 (2006.01) A61M 16/06 (2006.01)

Patent

CA 2112884

An apparatus (10) for controlling the pressure of a respiratory gas delivered to a patient includes a phase detection circuit (24) for determining the inhalation and exhalation phases of the patient's respiratory cycle. More particularly, a flow signal representative of the respiratory flow is compared to second signal, offset in time and scaled in magnitude relative to the flow signal, in order to determine the transition from one phase to the next.

Appareil (10) pour contrôler la pression d'un gaz respiratoire distribué à un patient. L'appareil comprend un circuit de détection (24) qui détermine les phases d'inhalation et d'expiration du cycle respiratoire d'un patient. Particulièrement, un signal d'écoulement indicatif de la circulation respiratoire est comparé à un deuxième signal, décalé dans le temps et proportionné selon une échelle de magnitude par rapport au signal d'écoulement, afin de déterminer la transition d'une phase à la prochaine phase.

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