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Vercise™ DBS Physician Manual
Note: The longevity and recharge interval estimates in this document were generated
using projections of typical results based on Boston Scientific's internal testing
data. Actual results may vary.
Multiple-Area Battery-Longevity Worksheet
Use this method when more than one area is used.
1. Calculate the TOTAL RATE of the stimulation frequencies by adding together the rate
from each area that is used:
TOTAL RATE = Rate 1____+ Rate 2____
+ Rate 3____+ Rate 4 ____
TOTAL RATE = _____Hz
2. Calculate the Rate‑Weighted Pulse Width (RWPW) for each area used by multiplying
the Pulse Width value for each area used by the Rate of that area and then dividing the
result by the TOTAL RATE that was calculated in step 1.
RWPW1 = PW1 x Rate 1/ TOTAL RATE = _____
RWPW2 = PW2 x Rate 2/ TOTAL RATE = _____
RWPW3 = PW3 x Rate 3/ TOTAL RATE = _____
RWPW4 = PW4 x Rate 4/ TOTAL RATE = _____
3. Calculate the Total‑Weighted Pulse Width (TWPW) by adding together the Rate‑
Weighted Pulse Widths calculated in step 2.
TWPW = RWPW1____+ RWPW2____
+ RWPW3____+ RWPW4____
TWPW = _________ µs
4. Determine the area with the largest amplitude.
Largest amplitude = __________ mA
5. Look up the battery‑longevity projection in the table using the Total Rate, TWPW,
and largest amplitude. (Interpolation may be used for improved accuracy.) The
battery-longevity projection is given in years and represents the longevity of a
typical rechargeable Stimulator battery when used continuously. If the rechargeable
Stimulator battery is not used continuously, the battery‑longevity should be greater
than the value given.
Vercise™ DBS Physician Manual
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