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WaveWriter Alpha™and WaveWriter Alpha™ Prime Implantable Pulse Generator
Estimating Longevity
After the optimal settings have been identified for a program, click on Battery Estimate in the Program
Options Menu in the Bionic Navigator™ 3D software to obtain the Energy Use Index. Use Figure 1 (if
estimated usage of stimulation is 12 hours) or Figure 2 (if estimated usage of stimulation is 24 hours) to
identify the longevity that corresponds to this Energy Use Index. Figures 1 and 2 take into account nominal
non-therapy power consumption, including shelf-life and patient remote control use. If the estimate
for longevity obtained by these Figures is below 12 months, consider evaluating a Boston Scientific
rechargeable System.
Figure 1. Longevity estimates based on 12 hour
per day usage
Example: Estimating Battery Longevity with Nominal Program Settings.
Nominal Program Settings*
4.1 mA, 280 µs, 40 Hz,
1 Area, 730 Ohms, 2 Contacts
*Nominal settings based on Oakley et al. Stimulation Power by Disease Diagnosis in Spinal Cord
Stimulation. Presented at American Academy of Pain, 2006.
Elective Replacement
When the battery is nearing depletion, the IPG will enter the Elective Replacement mode. The Elective
Replacement Indicator (ERI) will appear on the Remote Control and Clinician Programmer. Failure to
replace the IPG may lead to reduced programming capabilities, limited communication with the IPG,
and stimulation not being available soon. The IPG must be replaced to continue receiving stimulation.
Batteries that have lasted 12 months or more without entering ERI mode will have a minimum of 4 weeks
between entering ERI mode and reaching End of Battery Life. Surgery is required to replace the implanted
non-rechargeable IPG. Leads may stay in place while the IPG is exchanged.
Implantable Pulse Generator
92959607-02
8 of 503
Figure 2. Longevity estimates based on 24 hour
per day usage
Energy Use Index Mode of Operation
10
Hours of stimulation
per day: 12
Battery Longevity
Approximately 5.1 years
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