Synchronizing continuous signals and discrete events for an implantable medical device
First Claim
1. A system comprising:
- an implantable medical device, the implantable medical device comprising;
at least one electrical input, to receive sensed electrical activity of a heart;
a sampler circuit, coupled to the at least one electrical input, operable to generate sampled values of the sensed electrical activity;
a clock circuit, the clock circuit operable to generate readable values, wherein the clock circuit and the readable values roll over every few minutes;
a memory, including an event marker buffer; and
a controller circuit, coupled to the sampler circuit, the clock circuit, and the memory, the controller circuit operable to;
process the sampled values to generate at least one marker to indicate a detected event related to the sensed electrical activity,read a clock circuit value as a timestamp denoting when the detected event occurred referenced with respect to a clock circuit time window of a clock circuit that rolls over every few minutes; and
store the at least one marker with the timestamp in the event marker buffer of the memory; and
an external device operable to receive information, including the marker with the timestamp, in substantially real time from the implantable medical device and to use the timestamp to align the information on a display.
1 Assignment
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Accused Products
Abstract
A system comprises an implantable medical device (IMD). The IMD includes at least one electrical input to receive sensed electrical activity of a heart and a sampler circuit coupled to the at least one electrical input. The sampler circuit generates sampled values of the sensed electrical activity. The IMD includes a clock circuit that generates readable values representative of absolute time. The IMD also includes a controller circuit coupled to the sampler circuit and the clock circuit. The controller circuit processes the sampled values and generate at least one marker to indicate a detected event related to the electrical activity. The controller circuit also stores a timestamp of absolute time of the detected event with the at least one marker in memory.
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Citations
32 Claims
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1. A system comprising:
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an implantable medical device, the implantable medical device comprising; at least one electrical input, to receive sensed electrical activity of a heart; a sampler circuit, coupled to the at least one electrical input, operable to generate sampled values of the sensed electrical activity; a clock circuit, the clock circuit operable to generate readable values, wherein the clock circuit and the readable values roll over every few minutes; a memory, including an event marker buffer; and a controller circuit, coupled to the sampler circuit, the clock circuit, and the memory, the controller circuit operable to; process the sampled values to generate at least one marker to indicate a detected event related to the sensed electrical activity, read a clock circuit value as a timestamp denoting when the detected event occurred referenced with respect to a clock circuit time window of a clock circuit that rolls over every few minutes; and store the at least one marker with the timestamp in the event marker buffer of the memory; and an external device operable to receive information, including the marker with the timestamp, in substantially real time from the implantable medical device and to use the timestamp to align the information on a display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 32)
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18. A method comprising:
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sensing electrical activity of a heart using an implantable device; detecting, using the implantable device, events associated with the electrical activity; generating and storing event markers representing the events in a memory included within the implantable device, the generating of each event marker including generating a timestamp of when a corresponding event occurred, the timestamp denoting when the event occurred referenced with respect to a clock circuit time window generated by a clock circuit, in the implantable device, including using the clock circuit to generate a clock circuit time window that rolls over every few minutes; transmitting the event markers, including respective timestamps, from the implantable device to an external device in substantially real time; and using the timestamp to align information on a substantially real time display of the external device. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification