DOSE MEASUREMENT SYSTEM AND METHOD
2 Assignments
0 Petitions
Accused Products
Abstract
Embodiments described herein generally relate to devices, systems and methods for measuring the dose remaining in a drug delivery device that is used for delivering a dose to a patient. In some embodiments, a dose measurement system for measuring the liquid volume in a container includes a plurality of light sources which are disposed and configured to emit electromagnetic radiation toward the container. A plurality of sensors are located in the apparatus that are optically coupleable to the plurality of light sources and are disposed and configured to detect the electromagnetic radiation emitted by at least a portion of the light sources. The apparatus also includes a processing unit configured to receive data representing the portion of the detected electromagnetic radiation from each of the plurality of sensors. The processing unit is further operable to convert the received data into a signature representative of the electromagnetic radiation detected by the plurality of sensors.
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Citations
63 Claims
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1-43. -43. (canceled)
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44. An apparatus, comprising:
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at least one light source configured to emit electromagnetic radiation, the electromagnetic radiation including a plurality of light rays; a plurality of sensors configured to detect at least a portion of the plurality of light rays emitted by the at least one light source; and a processing unit configured to generate a signal signature representative of at least one of a transmitted portion, a refracted portion, and a reflected portion of the detected portion of the plurality of light rays. - View Dependent Claims (45, 46, 47, 48, 49, 50, 52, 53)
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51. The apparatus of 50, wherein the signal signature is representative of transmitted portion of the first light ray, refracted portion of the second light ray, reflected portion of the third light ray, and reentered portion of the fourth light ray into the signal signature.
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54. An apparatus, comprising:
a processing unit operably coupled to a light source and a plurality of sensors, the processing unit configured to; operate the light source to generate a dark state; operate each sensor in the plurality of sensors to detect electromagnetic radiation in a container in the dark state; generate a background signal signature representative of the detected electromagnetic radiation in the dark state; and associate the background signal signature as a signal signature to correct for background noise. - View Dependent Claims (55, 56, 57, 58, 59, 60)
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61. An apparatus for estimating a dose delivered from an injection pen, the apparatus comprising:
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a communication interface; a memory to store processor-executable instructions; and at least one processor communicatively coupled to the memory and the communication interface, wherein upon execution of the processor-executable instructions by the at least one processor, the at least one processor; generates a first signal signature representative of a portion of detected electromagnetic radiation from each of a plurality of sensors at a first time, the plurality of sensors optically coupleable to a light source disposed and configured to emit electromagnetic radiation including a plurality of light rays toward the injection pen, the plurality of sensors disposed and configured to detect at least two light rays of the plurality of light rays; compares the first signal signature to a plurality of reference signatures to determine a first volume of liquid in the injection pen; generates a second signal signature representative of a portion of the detected electromagnetic radiation from each of the plurality of sensors at a second time after the first time; compares the second signature to the plurality of reference signatures to determine a second volume of liquid in the injection pen; and estimates a dose delivered from the injection pen based on the first volume and the second volume. - View Dependent Claims (62, 63)
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Specification