Rns ® System Longevity - Neuropace RNS System User Manual

Responsive Neurostimulator System
programmer may experience telemetry artifacts or errors, or may freeze. In the event of a
programmer freeze, refer to the troubleshooting section.
®
RNS S L
YSTEM ONGEVITY
®
RNS Neurostimulator Battery
Neurostimulator longevity depends on the amount of stimulation delivered to the patient. Each time
the neurostimulator delivers stimulation, a small amount of charge is drained from the battery. The
battery information for each neurostimulator can be obtained through the PDMS. Battery
measurements can be taken using a programmer.
®
RNS Neurostimulator Battery Life Estimation for Model RNS-300M
The following battery information is theoretical. In actual use, the programmed stimulation parameters
and other factors, such as lead impedance, may vary. Therefore, the following battery longevity
estimates from beginning of battery life to end of service were calculated utilizing three patient-use
profiles: Low (5th Percentile), Medium (50th Percentile), and High (95th Percentile). It is important to
®
note that the RNS
and low operating settings.
Patient Use Profile
th
Low (5 Percentile)
Medium (50
th
High (95
* Estimated battery longevity following 9 months of shelf storage.
These patient-use profiles were derived from data collected during the RNS
Investigations in Epilepsy through May 12, 2011. The data (battery use in mAh/day) at the 5th, 50th,
and 95th percentile levels were used to calculate the battery longevity estimates presented in the
table above.
These same data have been converted into the profiles in the table below to illustrate typical therapy
parameters that would lead to the specified battery use. (Note that, e.g., half as many bursts per day
with twice the burst duration would provide identical battery life.)
®
RNS System User Manual
Neurostimulator is a responsive neurostimulator and does not have high, medium,
Calculated Battery Longevity to End of Service (EOS)
(Model RNS-300M)
th
Percentile)
Percentile)
Battery Capacity
(mAh)
705
705
705
26
Longevity Estimate *
(years)
4.26
3.91
2.64
®
System Clinical