FIAB 4427 Easypace - Checking the Charge and Replacing the Batteries

Cardiac stimulator 4427 Easypace - Instructions for use
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In such case the stimulation mode automatically shifts from VVI mode to V00 mode with
the parameters of stimulation set up before. The User is warned of electromagnetic
interference by means of two signals, acoustic (a “beep” every 5 seconds) and visual
(indication of EMI on the display).
Consequently impulses with rate below 300 ppm (periods exceeding 200 ms), being in the
frequency range of the heart spontaneous activity, cannot be interpreted as noises,
Therefore the solution in these cases is to remove the source of the interference or shift to
the V00 mode.
Before beginning the procedure it is advisable to:
• check the contact between electrocatheter and the sockets;
• check the state of the electrocatheter itself;
• optimize the device sensibility in order to assure a steady harnessing value of
spontaneous heart activity and an effective noise rejection;
• make sure that no electromagnetic fields or interferences are present in the
environment where the 4427 device (cf. § 2.1 - Electromagnetic immunity - note (1)
WARNING!).
11.5. Checking the charge and replacing the batteries
Assessment of the main and stand-by batteries charge is made during the self-test
(see the relevant paragraph) and during normal operation.
Under normal operating conditions, with fresh alkaline batteries, the stimulator has an
autonomy of at least 10 days. By the moment the microprocessor detects an insufficient
charge level of the main batteries, the remaining autonomy is at least 12 hours, during
which time it is possible to replace the main batteries as described here below. The
insufficient charge level is signalled both by a “beep” sound, at intervals of 4 minutes, and
by the message “LOWB” appearing on the display.
When acting on BATTERY CHANGE in order to activate a replacement of the main
batteries, the microprocessor - before shifting the supply to the stand-by batteries - carries
out an instantaneous test on the charge level of the latter and, if found insufficient -