EVENT-BASED BATTERY MONITOR FOR IMPLANTABLE DEVICES
First Claim
1. A cardiac rhythm management system comprising:
- a remote physiological sensor powered by a battery having an initial charge capacity, wherein the remote physiological sensor includes an active state, during which the remote physiological sensor performs at least one function, and an inactive state, during which no functions are performed by the remote physiological sensor; and
a pulse generator configured to communicate with the remote physiological sensor via telemetry, wherein the pulse generator includes a memory operable to store parameters associated with charge consumption for each function performed by the remote physiological sensor and a leakage current associated with the inactive state, wherein the pulse generator further includes a processor operable to determine an active state charge consumption based on the stored parameters and an inactive state charge consumption based on the stored leakage current and a time the device is in the inactive state, and wherein the processor is further operable to subtract the active state charge consumption and inactive state charge consumption from the initial charge capacity to determine a remaining charge capacity of the battery.
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Accused Products
Abstract
A remaining charge capacity of a battery having an initial charge capacity is monitored. The battery powers a remote implantable medical device (IMD) that includes an active state, during which the remote IMD performs at least one function, and an inactive state, during which the remote IMD performs no functions. An active state charge consumption is computed based on stored parameters associated with an operational charge consumption for each function, and an inactive state charge consumption is computed based on a leakage current associated with the inactive state and a time the remote IMD is in the inactive state. The active state charge consumption and inactive state charge consumption are subtracted from the initial charge capacity to determine the remaining charge capacity.
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Citations
20 Claims
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1. A cardiac rhythm management system comprising:
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a remote physiological sensor powered by a battery having an initial charge capacity, wherein the remote physiological sensor includes an active state, during which the remote physiological sensor performs at least one function, and an inactive state, during which no functions are performed by the remote physiological sensor; and a pulse generator configured to communicate with the remote physiological sensor via telemetry, wherein the pulse generator includes a memory operable to store parameters associated with charge consumption for each function performed by the remote physiological sensor and a leakage current associated with the inactive state, wherein the pulse generator further includes a processor operable to determine an active state charge consumption based on the stored parameters and an inactive state charge consumption based on the stored leakage current and a time the device is in the inactive state, and wherein the processor is further operable to subtract the active state charge consumption and inactive state charge consumption from the initial charge capacity to determine a remaining charge capacity of the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for monitoring a remaining charge capacity of a battery having an initial charge capacity, wherein the battery powers a remote implantable medical device (IMD) that includes an active state, during which the remote IMD performs at least one function, and an inactive state, during which the remote IMD performs no functions, the method comprising:
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activating the remote IMD from the inactive state to perform one or more functions; receiving data related to the one or more functions from the remote IMD; returning the remote IMD to the inactive state; computing an active state charge consumption based on stored parameters associated with an operational charge consumption for each function; computing an inactive state charge consumption based on a leakage current associated with the inactive state and a time the remote IMD is in the inactive state; and subtracting the active state charge consumption and inactive state charge consumption from the initial charge capacity. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A system for monitoring a remaining charge capacity of a battery in an implantable device, wherein the battery has an initial charge capacity, and wherein the implantable device includes an active state, during which the implantable device performs at least one function, and an inactive state, during which the implantable device performs no functions, the system comprising:
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a memory operable to store parameters associated with charge consumption for each function and a leakage current associated with the inactive state; and a processor operable to determine an active state charge consumption based on the stored parameters and an inactive state charge consumption based on the stored leakage current and a time the device is in the inactive state, wherein the processor is further operable to subtract the active state charge consumption and inactive state charge consumption from the initial charge capacity to determine the remaining charge capacity. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification