Boston Scientific Vercise DB-1110-C Manual página 81

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 1500 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.
Determining Longevity
1. Fit the Vercise™ DBS System to the 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 Vercise™ Stimulator
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 Vercise DBS System. Interpolation between a cell with
an "*" and another cell is not possible.
Appendix
Vercise™ DBS Physician Manual
91098825-11 77 of 341