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This product has not been returned to boston scientific, and as a result, laboratory analysis could not be conducted.The associated investigation determined that battery status indicators were different than expected based on information provided to boston scientific.Factors influencing the estimated longevity remaining calculation include pacing rate, amplitude, pulse-width and lead impedance.Any changes in these factors will impact the battery consumption calculation and therefore the remaining longevity estimate.Please note this pacemaker's battery was designed to estimate remaining longevity based on the pacing capacitor charge time, which progressively increases as the battery depletes.These pacemakers were not designed with an ability to calculate remaining longevity for every possible current drain, which may cause replacement indicators to trigger earlier than what was previously estimated; however, it does not negatively impact the use, operation, safety, or performance of the device.
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It was reported that this pacemaker device had less than six months remaining battery upon interrogation last december.However, when checked in april device showed one year remaining battery.Boston scientific technical services (ts) discussed gas gauge behavior, possible reasons and was referred to the physician for further discussion of changed in programmed parameters.To date, this device remains in service.No adverse patient effects were reported.
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