Infusion pump system and method
First Claim
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1. A portable infusion pump system, comprising:
- a portable housing defining a space to receive a medicine;
a pump drive system positioned in the portable housing to dispense the medicine from the pump device when the medicine is received in the space of the portable housing;
control circuitry configured to electrically communicate with the drive system to control dispensation of the medicine from the portable housing;
a clearance hole formed in the exterior of the portable housing; and
a channel extending through the portable housing that defines an open airflow passageway, the channel being in fluid communication with the clearance hole, an interior surface of the channel defining a narrowed restriction region having a reduced width that is less than a corresponding width of the open airflow passageway at another region, the restriction region dimensioned to inhibit ingress of liquid to an interior of the portable housing while allowing the channel to provide air pressure equilibrium between an exterior of the portable housing and the interior of the portable housing, wherein the narrowed restriction region of the channel is free of an occupying structure.
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Abstract
Some embodiments of an infusion pump system may be configured to provide a desired level of resistance to liquid ingress to the pump casing while contemporaneously providing air transmissibility for equalization of air pressure differentials between the interior and exterior of the pump casing. Further, some embodiments can detect when moisture inside a casing of the infusion pump system is greater than or equal to a threshold level and can initiate one or more patient safety countermeasures.
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Citations
20 Claims
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1. A portable infusion pump system, comprising:
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a portable housing defining a space to receive a medicine; a pump drive system positioned in the portable housing to dispense the medicine from the pump device when the medicine is received in the space of the portable housing; control circuitry configured to electrically communicate with the drive system to control dispensation of the medicine from the portable housing; a clearance hole formed in the exterior of the portable housing; and a channel extending through the portable housing that defines an open airflow passageway, the channel being in fluid communication with the clearance hole, an interior surface of the channel defining a narrowed restriction region having a reduced width that is less than a corresponding width of the open airflow passageway at another region, the restriction region dimensioned to inhibit ingress of liquid to an interior of the portable housing while allowing the channel to provide air pressure equilibrium between an exterior of the portable housing and the interior of the portable housing, wherein the narrowed restriction region of the channel is free of an occupying structure. - View Dependent Claims (2, 3, 4, 8, 9, 10, 11)
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5. A portable infusion pump system, comprising:
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a portable housing defining a space to receive a medicine; a pump drive system positioned in the portable housing to dispense the medicine from the pump device when the medicine is received in the space of the portable housing; control circuitry configured to electrically communicate with the drive system to control dispensation of the medicine from the portable housing; and a channel extending through the portable housing that defines an open airflow passageway, the channel being in fluid communication with an opening in an exterior of the portable housing, an interior surface of the channel at least partially defining a narrowed restriction region having a reduced width that is less than a corresponding width of the open airflow passageway at another region, the restriction region dimensioned to inhibit ingress of liquid to an interior of the portable housing while allowing the channel to provide air pressure equilibrium between an exterior of the portable housing and the interior of the portable housing. - View Dependent Claims (6, 7)
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12. A medical infusion pump system, comprising:
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a portable housing defining a space to receive a medicine; a pump drive system to dispense medicine from the portable housing when the medicine is received in the space; control circuitry that electrically communicates with the pump drive system to control dispensation of the medicine from the portable housing when the medicine is received in the space; and a liquid ingress resistance structure positioned in the portable housing and exposed to both an exterior of the portable housing and an interior of the portable housing, the liquid ingress resistance structure defining a predefined airflow passageway that provides air pressure equilibrium between the exterior of the portable housing and the interior of the portable housing and that inhibits ingress of water to the interior of the portable housing when the portable housing is submerged in water for a period of time, wherein the liquid ingress resistance structure comprises; a first portion exposed to the exterior of the portable housing; a second portion exposed to the interior of the portable housing; and a third portion positioned between the first portion and second portion, the third portion being narrowed to inhibit ingress of liquid from the first portion to the second portion; wherein the first, second, and third portions are defined by one or more inner surfaces of the liquid ingress resistance structure. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification