Boston Scientific Vercise DBS Mode D'emploi page 80

Physician Manual
2. In the following chart, look up the battery-longevity based on the amplitude,
rate, and pulse width values that correspond most closely to the settings from
step 1. (Interpolation may be used for improved accuracy.) The battery-longevity
projections are given in years and represent the longevity of a typical Vercise™
Stimulator battery when used continuously. If the rechargeable Stimulator battery
is not used continuously, the battery-longevity should be greater than the value
given.
Note: Cells in the table that are marked with an "*" represent stimulation settings
that cannot be attained with the Vercise DBS System. Interpolation between a
cell with an "*" and another cell is not possible.
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____
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
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+ Rate 3____+ Rate 4 ____