Appendix - Boston Scientific Precision SC-1110 Mode D'emploi

Appendix

Rechargeable Stimulator Battery Longevity
The rechargeable Stimulator battery should provide at least five years of service. In many
cases, the Stimulator battery should provide at least 25 years of service. Battery-longevity
is dependent on the stimulation settings and conditions. The battery-longevity projections
provided in the table below are based on continuous stimulation with one area and one
program. The longevity estimates are generated using projections of typical results based on
Boston Scientific internal testing data. Actual results may vary. To determine battery-longevity
with multiple-area stimulation, please use the Multiple-Area Longevity Worksheet provided
below. To determine battery-longevity with multiple stimulation programs, please use the
Multiple-Program Longevity Worksheet provided below. If stimulation is not used continuously,
the projected battery longevity should exceed the value shown.
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.
Appendix
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