Boston Scientific Precision SC-1110 Serie Manual De Uso página 72

Precision™ System Clinician Manual
Defining End of Battery Longevity
The expected battery longevity is defined as
the longer of either:
a) Typical case: the time from initiating
therapy to the time at which therapy
cannot be maintained with daily
charging
OR
b) High energy case: when the maximum
time between charging has decreased
by more than 50% from the initial
maximum time between charging.
Effect of Impedance on Battery-Longevity
Projections
This chart assumes a maximum impedance
of 750 ohms between any 2 contacts in use.
For lower impedance values, the projected
battery longevity should slightly exceed the
value shown, for higher impedances, the
projected battery longevity should be slightly
less than the value shown. For example, the
following stimulation settings/conditions give
battery-longevity projections of 10.2 years:
Amplitude: 6 mA
Rate: 240 Hz
Pulse width: 400 micro seconds
Impedance: 750 ohms
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.
Clinician Manual
9055959-008 Rev A 70 of 327
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 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 Precision System. Interpolation
between a cell with an "*" and
another cell is not possible.
• 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.