DRUG-DELIVERY PUMP WITH INTELLIGENT CONTROL
First Claim
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1. A drug pump device comprising:
- a drug reservoir;
an exit member for fluidically connecting the reservoir with a drug injection site;
a flow sensor;
an electrolysis pump operable to continuously force fluid from the drug reservoir into the exit member during a continuous pumping cycle; and
control circuitry configured to;
(a) store a range of an operating parameter defined by an upper parameter boundary and a lower parameter boundary;
(b) based on signals received from the sensor, measure a volume of fluid through the exit member during a first time window;
(c) compare the measured volume to an expected volume;
(d) based on the comparison, alter an operating parameter during a second time window following the first time window, the altered operating parameter being within the parameter range; and
(e) repeat (b)-(d) during the continuous pumping cycle.
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Abstract
Embodiments of the present invention utilize a closed-loop feedback control system to ensure accurate drug delivery. This control system may, for example, utilize a flow sensor to measure the volume of delivery and an intelligent control algorithm to anticipate and compensate for overdoses and underdoses. Feedback control systems in accordance herewith can be applied to any piston- or plunger-driven pump system utilizing sensors that measure flow directly or indirectly. Depending on the mode of operation, fluid may be dispensed continuously or in discrete pulses, and the manner of adjustment or calibration may be tailored to the operational mode in use.
29 Citations
15 Claims
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1. A drug pump device comprising:
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a drug reservoir; an exit member for fluidically connecting the reservoir with a drug injection site; a flow sensor; an electrolysis pump operable to continuously force fluid from the drug reservoir into the exit member during a continuous pumping cycle; and control circuitry configured to; (a) store a range of an operating parameter defined by an upper parameter boundary and a lower parameter boundary; (b) based on signals received from the sensor, measure a volume of fluid through the exit member during a first time window; (c) compare the measured volume to an expected volume; (d) based on the comparison, alter an operating parameter during a second time window following the first time window, the altered operating parameter being within the parameter range; and (e) repeat (b)-(d) during the continuous pumping cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a drug pump device comprising a drug reservoir, an exit member for fluidically connecting the reservoir with a drug injection site, and an electrolysis pump operable to continuously force fluid from the drug reservoir into the exit member during a continuous pumping cycle, a method of controlling an actual delivery volume of fluid to conform to a target delivery volume, the method comprising:
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(a) providing a range of an operating parameter, the range being defined by an upper parameter boundary and a lower parameter boundary; (b) measuring a volume of fluid through the exit member during a first time window; (c) comparing the measured volume to an expected volume; (d) based on the comparison, altering an operating parameter during a second time window following the first time window, the altered operating parameter being within the parameter range; and (e) repeating steps (b)-(d) during the continuous pumping cycle. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification