Flow rate controller for a medication infusion pump

Details Flow rate controller for a medication infusion pump Flow rate controller for a medication infusion pump

A - Human Necessities

61

M

A61M 5/175 (2006.01) A61M 5/142 (2006.01) A61M 5/168 (2006.01) A61M 31/00 (2006.01)

Patent

CA 2230316

A flow rate controller is provided for regulating the flow rate of medication delivered to a patient by an implantable medication infusion pump of the constant flow type, to minimize or prevent flow rate increases attributable to fluctuations in ambient pressure. The infusion pump comprises an implantable pump housing with a pressurized medication reservoir therein for continuous flow delivery to the patient through a baseline flow path including a restrictor such as a capillary tube. The controller comprises a pressure responsive control valve for connecting a secondary restrictor such as an additional capillary tube in series with the baseline flow path, to prevent undesired increase in the medication flow rate in the event that the patient temporarily encounters a high altitude ambient pressure.

Régulateur de débit d'un médicament administré à un patient par une pompe à perfusion implantable de type débit constant, afin de réduire ou d'empêcher des augmentations de débit attribuables à des fluctuations de la pression ambiante. La pompe à perfusion comprend un boîtier de pompe implantable pourvu d'un réservoir de médicament pressurisé permettant une administration à débit continu au patient par une voie d'acheminement de base comportant un restricteur comme un tube capillaire. Le régulateur comprend une vanne de régulation sensible à la pression qui permet de relier en série un restricteur secondaire, comme un tube capillaire supplémentaire, à la voie d'acheminement de base, afin d'empêcher une augmentation non voulue du débit du médicament au cas où le patient serait temporairement touché par une pression ambiante en haute altitude.

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