Product Info
Information for Prescribers
WaveWriter Alpha™ & WaveWriter Alpha™ Prime Systems Information for Prescribers
92395224-01 20 of 23
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 Scientic
rechargeable system.
Longevity, Years
Energy Use Index
Longevity, Years
Energy Use Index
Figure 1: Longevity estimates based on 12 hour
per day usage
Figure 2: Longevity estimates based on 24 hour
per day usage
Example: Estimating Battery Longevity with Nominal Program Settings
Nominal Program Settings* Energy
Use Index
Mode of Operation Battery Longevity
4.1 mA, 280 us, 40 Hz, 1 area, 730
Ohms, 2 contacts
10 Hours of stimulation
per day: 12
Approximately 5.1
years
*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 (for Non-Rechargeable Systems)
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
stimulator, and stimulation not being available soon. The stimulator 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 Stimulator, although leads may stay in place while the stimulator is
exchanged.