Detecting empty medical pump reservoir
First Claim
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1. A medical device system comprising:
- a reservoir configured to store a therapeutic fluid;
a medical pump configured to deliver the therapeutic fluid from the reservoir to a patient, the medical pump comprising an actuation mechanism configured to be energized to provide a pump stroke;
a sensor configured to detect a property associated with the energy required to energize the actuation mechanism;
a processor configured to determine when the property associated with the energy required to energize the actuation mechanism indicates the reservoir is empty or near empty; and
wherein the property associated with the energy required to energize the actuation mechanism comprises at least one of a shape of a current waveform through the actuation mechanism when providing for a pump stroke, an energy supplied to the actuation mechanism in order to produce a pump stroke, and a voltage change across the actuation mechanism during a pump stroke.
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Abstract
A medical device system comprises a reservoir configured to store a therapeutic fluid and a medical pump configured to deliver the therapeutic fluid from the reservoir to a patient. The system also comprises a sensor that can detect a characteristic associated with the pump and a processor to determine if the characteristic detected indicates the reservoir is empty or near empty. The characteristic may comprise a property associated with the energization of an actuation mechanism configured to be energized to provide a pump stroke. The characteristic may also comprise a characteristic of a noise made by an actuator within the pump at the end of a pump stroke.
62 Citations
13 Claims
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1. A medical device system comprising:
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a reservoir configured to store a therapeutic fluid; a medical pump configured to deliver the therapeutic fluid from the reservoir to a patient, the medical pump comprising an actuation mechanism configured to be energized to provide a pump stroke; a sensor configured to detect a property associated with the energy required to energize the actuation mechanism; a processor configured to determine when the property associated with the energy required to energize the actuation mechanism indicates the reservoir is empty or near empty; and
wherein the property associated with the energy required to energize the actuation mechanism comprises at least one of a shape of a current waveform through the actuation mechanism when providing for a pump stroke, an energy supplied to the actuation mechanism in order to produce a pump stroke, and a voltage change across the actuation mechanism during a pump stroke. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A medical device system comprising:
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means for storing therapeutic fluid; means for removing therapeutic fluid from the means for storing the therapeutic fluid, the means for removing the therapeutic fluid comprising means for actuating the fluid and means for energizing the means for actuating the fluid to provide a pump stroke; means for detecting a property associated with the energy required to energize the means for actuating the fluid;
means for determining that the property associated with the energy required to energize the means for actuating the fluid indicates the means for storing the therapeutic fluid is empty or near empty; and
wherein the property associated with the energy required to energize the means for actuating the fluid comprises at least one of a shape of a current waveform through the means for actuating the fluid when providing for a pump stroke, an energy supplied to the means for actuating the fluid in order to produce a pump stroke, a voltage change across the means for actuating the fluid during a pump stroke, a time required to recharge the means for energizing the means for actuating the fluid after a selective energization of the means for actuating the fluid in order to produce a pump stroke, an energy required to recharge the means for energizing the means for actuating the fluid after a selective energization of the means for actuating the fluid in order to produce the pump stroke, and a voltage change across the means for energizing the means for actuating the fluid during recharging of the means for energizing the means for actuating the fluid.
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Specification