Boston Scientific SC-5210 Manuel page 50

Patient System Handbook
If impedance is 500 ohms rather than 750 ohms, the battery-longevity projection is extended to 11.3 years. Likewise if the impedance
is 1000 ohms, the battery-longevity projection decreases to 9.7 years. Thus, impedance has a small impact on battery-longevity
projections.
Determining Longevity
1. Fit the Precision System to patient, make note of the amplitude, rate and pulse width for each of the areas. For multi-area
stimulation please use the Multiple-Area Battery-Longevity Worksheet.
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 Precision battery when used continuously. If the rechargeable implant 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 Precision 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' 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 = _______
Patient System Handbook
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