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Precision™ Spinal Cord Stimulator System Clinician Manual
Clinician Manual
90607862-30 66 of 309
en
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-Weight-
ed Pulse Widths calculated in step 2.
TWPW = RW RW RW RWPW4____
TWPW = _________ micro seconds
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-lon-
gevity 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.
Multiple-Area Battery Longevity Worksheet Example 1
In this example two stimulation areas are used with the following settings:
Area 1: Amplitude = 5.0 mA, Rate = 30 Hz, PW = 200 micro sec
Area 2: Amplitude = 8.0 mA, Rate = 60 Hz, PW = 400 micro sec
1. Calculate the TOTAL RATE (TR) of the stimulation frequencies by adding together the
rate from each area that is used:
TOTAL RATE = Rate 1 30 Hz + Rate 2 60 Hz
TOTAL RATE =
90 Hz
Содержание Precision Spinal Cord Stimulator System
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