Patent ID: 8131365
Filing Date: 2012-03-06
Classification: A61N,G01R

Abstract:
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, the remote physiological sensor configured to transmit data related to a voltage of the battery; and a pulse generator configured to communicate with the remote physiological sensor via telemetry, wherein the pulse generator includes a memory configured 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 configured 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, the processor further configured to subtract the active state charge consumption and inactive state charge consumption from the initial charge capacity to determine an estimated remaining charge capacity of the battery, the processor further configured to periodically receive the data related to the voltage of the battery from the remote physiological sensor and determine a verifying remaining charge capacity based on the voltage of the battery, wherein the processor is further configured to compare the estimated remaining charge capacity to the verifying remaining charge capacity to ensure accuracy of the estimated remaining charge capacity.