Fluid Delivery Device With Autocalibration
2 Assignments
0 Petitions
Accused Products
Abstract
A micro fluid delivery device is particularly useful in medical applications. The device may be worn or carried by the user and may deliver drugs or other medicaments to the user or patient. The device has a control system that accepts input from the user and controls all aspects of operation of the device. The control system measures the output of the pump and adjusts the output of the pump to achieve the desired dosage rate and size. This eliminates differences from pump to pump that result from inevitable variations in the manufacturing of such small scale affordable devices.
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Citations
41 Claims
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1-21. -21. (canceled)
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22. A method, comprising:
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initiating a flow of a liquid through a portion of a pump having a known volume, wherein a shape memory element operatively coupled to a pump element is configured to move the pump element from a first position to a second position to initiate flow of the liquid; determining the time to pump the liquid through the known volume of the portion of the pump using a plurality of sensors, wherein each of the plurality of sensors are configured to detect an interruption of a flow stream of the liquid through the known volume portion of the pump; and determining a volume of a dose of the liquid based at least in part on the determined time to pump the known volume. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A method, comprising:
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initiating pumping of at least one dose using, at least in part, a shape memory element, wherein the shape memory element is operatively coupled to a piston and is configured to move the piston between a plurality of positions within a first portion of the pumping mechanism when pumping the at least one dose; measuring the at least one dose; comparing the measured at least one dose to an expected value of the at least one dose; calculating a ratio based on the comparing the measured at least one dose to the expected value of the at least one dose; and applying the calculated ratio to at least one subsequent dose when delivering the at least one subsequent dose. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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37. A method, comprising:
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pumping a liquid using, at least in part, a shape memory element, wherein the shape memory element is operatively coupled to a pumping element; detecting a liquid at a first sensor and a second sensor; measuring a time between detecting the liquid at the first sensor and the second sensor; determining a flow characteristic of the liquid; calculating a volumetric flow rate of the dispensing device; and adjusting the volumetric flow rate of the dispensing of the device. - View Dependent Claims (38, 39, 40, 41)
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Specification