Operating instructions

LIFEPAK 500 Automated External Defibrillator Operating Instructions 5-7
©1996–2003 Medtronic Physio-Control Corp.
Maintenance
5 Maintenance
BATTERY MAINTENANCE
The LIFEPAK 500 AED can be powered by two types of batteries:
• LIFEPAK 500 nonrechargeable lithium sulfur dioxide (LiSO
2
) or lithium manganese dioxide (LiMnO
2
)
battery pak
• LIFEPAK 500 rechargeable sealed lead-acid (SLA) battery pak
Note: Unless stated otherwise, references to nonrechargeable lithium apply to both LiSO
2
and
LiMnO
2
battery technologies.
Either type of battery may be installed. Follow the guidelines described in this section to help maximize
battery life and performance. Use only Medtronic Physio-Control Battery Pak batteries with the
LIFEPAK 500 AED.
Note: When a battery pak is removed from the AED, battery and service indicators appear on the
Readiness Display. After replacing the battery pak, turn on the device to reset the Readiness
Display.
Nonrechargeable Battery Pak
The nonrechargeable lithium battery pak requires less maintenance than the rechargeable SLA battery
pak since it never requires recharging. With the lithium battery pak installed, the LIFEPAK 500 AED
automatically tests it as part of the Daily Auto Test. The AED also performs the battery test during each
charge/discharge cycle and the first time the AED is turned on after a new battery has been installed.
To check the battery level, turn on the AED for at least 10 seconds and look for the
BATTERY status
message during the self-test. If there is no message, turn off the AED for at least one minute and then
turn it on again. The battery status message should display following the self-test. Do not check the
status of more than two lithium or three SLA batteries within a 15-minute period. The AED may not
accommodate more frequent battery checks.
When optimally maintained, a new LiSO
2
battery pak has a capacity of 7.5 Amp hours, which is
equivalent to 14 hours of “on time”
or 312 discharges. A new LiMnO
2
battery pak has a capacity of 10.0
Amp hours, which is equivalent to 18 hours of “on time”
or 416 discharges. Just turning the AED on (“on
time”) uses up battery capacity. Each year, battery capacity decreases while the battery is in the AED
because of the battery’s normal self-discharge rate and the energy used by the AED auto tests.
Figure 5-2 shows the expected capacity of the nonrechargeable lithium battery over 5 years as a result
of AED auto tests and battery self-discharge only. For example, after 4 years with no patient use of the
AED, approximately 35% of the useful life of the LiSO
2
battery remains and approximately 50% of the
useful life of the LiMnO
2
battery remains (LiSO
2
: 4.9 hours of “on time” or 109 discharges and LiMnO
2
:
8.9 hours of “on time” or 208 discharges). Any patient use of the AED, “on time” and shocks, will reduce
the battery’s useful life further.
WARNINGS!
Inability to provide therapy.
The LIFEPAK 500 nonrechargeable lithium manganese dioxide battery pak does not fit in all LIFEPAK
500 AEDs. Use only with AEDs marked
-003 inside the battery well.
Possible AED shutdown.
When the LIFEPAK 500 AED displays the REPLACE BATTERY message, replace the battery
immediately.
Possible loss of power during patient care.
Using an improperly-maintained battery to power the AED may cause power failure without warning.
Maintain batteries as described in these Operating Instructions.