Power Management System for a Piston-Based Implantable Infusion Pump
First Claim
1. An implantable infusion device comprising:
- a pump;
a charge storage unit;
a charging circuit configured to supply current to the charge storage unit from a battery in preparation for actuating the pump;
a pump actuator circuit configured to actuate the pump using energy from the charge storage unit; and
a voltage boost circuit configured to provide a boosted battery voltage generated from the battery,wherein the charging circuit is configured to supply current to the charge storage unit from the voltage boost circuit instead of directly from the battery in response to (i) a comparison of a voltage of the battery with a predetermined threshold and (ii) a comparison of a voltage of the charge storage unit with the voltage of the battery.
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Accused Products
Abstract
An implantable infusion device includes a pump, a charge storage unit, and a charging circuit configured to supply current to the charge storage unit from a battery in preparation for actuating the pump. The implantable infusion device also includes a pump actuator circuit configured to actuate the pump using energy from the charge storage unit, and a voltage boost circuit configured to provide a boosted battery voltage generated from the battery. The charging circuit is configured to supply current to the charge storage unit from the voltage boost circuit instead of directly from the battery in response to (i) a comparison of a voltage of the battery with a predetermined threshold and (ii) a comparison of a voltage of the charge storage unit with the voltage of the battery.
26 Citations
26 Claims
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1. An implantable infusion device comprising:
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a pump; a charge storage unit; a charging circuit configured to supply current to the charge storage unit from a battery in preparation for actuating the pump; a pump actuator circuit configured to actuate the pump using energy from the charge storage unit; and a voltage boost circuit configured to provide a boosted battery voltage generated from the battery, wherein the charging circuit is configured to supply current to the charge storage unit from the voltage boost circuit instead of directly from the battery in response to (i) a comparison of a voltage of the battery with a predetermined threshold and (ii) a comparison of a voltage of the charge storage unit with the voltage of the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of operating an implantable infusion device, the method comprising:
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supplying current from a battery to a charge storage unit in preparation for a cycle of a pump; selectively actuating the pump using energy from the charge storage unit; performing a first comparison of a voltage of the battery with a predetermined threshold; performing a second comparison of a voltage of the charge storage unit with the voltage of the battery; determining whether a boosted battery voltage is required in response to the first comparison and the second comparison; and when the boosted battery voltage is required, generating the boosted battery voltage and supplying current to the charge storage unit from the boosted battery voltage instead of directly from the battery. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification