Boston Scientific Precision SC-1110 Serie Manual De Uso página 73

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 = _________ 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-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.
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
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 previously calculated.
RWPW1 = PW1 x Rate 1/ TOTAL RATE =
(30 x 200)/90 = 66.67
RWPW2 = PW2 x Rate 2/ TOTAL RATE =
(60 x 400)/90 = 266.667
9055959-008 Rev A 71 of 327
Appendix B
Clinician Manual