Back to results
US 11,890,482 B2Granted
Medical device and method for estimating time between voltage levels of a power source
AssigneeMedtronic, Inc.
InventorJenna M.S. Pender
Life of this patent
Estimating the term…
Abstract
A medical device system and method estimate a time from a first voltage of a power source of a medical device to a second voltage of the power source. The medical device includes a sensor coupled to the power source for generating a physiological signal. The medical device system determines a current drain from the power source required for generating the physiological signal and/or processing the physiological signal for detecting events from the physiological signal. A processor of the medical device system is configured to estimate the time from the first voltage of the power source until the second voltage based on at least the determined current drain.
Claims27
A medical device system comprising:
- a power source;
- a therapy delivery circuit configured to deliver electrical stimulation pulses;
- a sensor coupled to the power source and configured to generate a physiological signal;
- a control circuit coupled to the power source, the therapy delivery circuit and the sensor, the control circuit configured to:
- detect events from the physiological signal;
- control the therapy delivery circuit to deliver the electrical stimulation pulses based on at least the events detected from the physiological signal;
- and
- determine a voltage of the power source;
- and
- a processor configured to:
- determine a first current drain including electrical current required from the power source for at least one of generating the physiological signal and detecting the events from the physiological signal;
- determine that the determined voltage of the power source has reached a first voltage;
- start a timer to track an elapsed time in response to determining that the determined voltage of the power source has reached the first voltage;
- determine an estimated time from the first voltage of the power source until a second voltage of the power source based on the first current drain and a power source capacity difference, where the first voltage of the power source corresponds to a first power source capacity, the second voltage corresponds to a second power source capacity less than the first power source capacity, and the power source capacity difference is the difference between the first power source capacity and the second power source capacity;
- determine a value of the timer when the estimated time is determined;
- adjust the estimated time by the value of the timer;
- and
- generate an output based on the adjusted estimated time;
- and
- a memory configured to store data corresponding to the adjusted estimated time in response to the output generated by the processor.
17 more elements
A method comprising:
- generating a physiological signal by a sensor coupled to a power source;
- detecting events from the physiological signal;
- delivering electrical stimulation pulses based on at least the events detected from the physiological signal;
- determining a voltage of the power source;
- determining a first current drain including electrical current required from the power source for at least one of:
- generating the physiological signal and detecting the events from the physiological signal;
- determining that the determined voltage of the power source has reached a first voltage;
- starting a timer to track an elapsed time in response to determining that the determined voltage of the power source has reached the first voltage;
- determining an estimated time from a first voltage of the power source until a second voltage of the power source based on the first current drain and a power source capacity difference, where the first voltage of the power source corresponds to a first power source capacity, the second voltage corresponds to a second power source capacity less than the first power source capacity, and the power source capacity difference is the difference between the first power source capacity and the second power source capacity;
- determining a value of the timer when the estimated time is determined;
- adjusting the estimated time by the value of the timer;
- and
- generating an output based on the adjusted estimated time;
- and
- storing in memory data corresponding to the adjusted estimated time in response to the generated output.
12 more elements
A non-transitory computer readable medium storing a set of instructions that, when executed by processing circuitry of a medical device system, cause the medical device system to:
- generate a physiological signal by a sensor coupled to a power source;
- detect events from the physiological signal;
- deliver electrical stimulation pulses based on at least the events detected from the physiological signal;
- determine a voltage of the power source;
- determine a current drain including electrical current required from the power source for at least one of:
- generating the physiological signal and detecting the events from the physiological signal;
- determine that the determined voltage of the power source has reached a first voltage;
- start a timer to track an elapsed time in response to determining that the determined voltage of the power source has reached the first voltage;
- determine an estimated time from a first voltage of the power source until a second voltage of the power source based on the first current drain and a power source capacity difference, where the first voltage of the power source corresponds to a first power source capacity, the second voltage corresponds to a second power source capacity less than the first power source capacity, and the power source capacity difference is the difference between the first power source capacity and the second power source capacity;
- determine a value of the timer when the estimated time is determined;
- adjust the estimated time by the value of the timer;
- generate an output based on the adjusted estimated time;
- and
- store data corresponding to the adjusted estimated time in response to the generated output.
11 more elements
Dependencies are inferred from the claim text.