Medtronic PROTECTA XT DR D314DRG, Clinician Manual

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A.2 Replacement indicators
The battery voltage and messages about replacement status appear on the programmer
display and on printed reports. The Recommended Replacement Time (RRT) and the End
of Service (EOS) conditions are listed in Table 14.
Table 14. Replacement indicators
Recommended Replacement Time (RRT) ≤ 2.63 V on 3 consecutive daily automatic meas-
urements
End of Service (EOS) 3 months after RRT
RRT date – The programmer displays the date when the battery reached RRT on the Quick
Look II and Battery and Lead Measurements screens.
Replace at EOS – If the programmer indicates that the device is at EOS, replace the device
immediately.
Prolonged Service Period – The Prolonged Service Period (PSP) is the time between the
RRT and EOS. The PSP is defined as 3 months assuming the following conditions: 100%
DDD pacing at 60 bpm, 2.5 V atrial and RV pacing amplitude; 0.4 ms pulse width; 600 Ω
pacing load; and 6 full-energy charges. The EOS may be indicated before the end of 3
months if the device exceeds these conditions.
A.3 Projected service life
The projected service life in years for the device is shown in Table 15. The data is based
on pacing outputs programmed to the specified amplitude and 0.4 ms pulse width and
60 bpm pacing rate.
The projected service life estimates assume the default automatic capacitor formation
setting. As a guideline, each full energy charge decreases projected service life by
approximately 32 days. The service life of the device is affected by the programmed settings
for certain features, such as Pre-arrhythmia EGM storage.
Projected service life estimates are based on accelerated battery discharge data and device
modeling as specified. These values should not be interpreted as precise numbers.
Medtronic PROTECTA™ XT DR D314DRG
448 Clinician Manual