Cardiac stimulator 4427 Easypace - Instructions for use
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10. Continuously monitor the Patient to change the set values or to put a dislodged
catheter in place, as necessary.
CAUTION !
The lead allows a low-resistance contact with the heart. It is thus
indispensable that the catheter sockets be not touched with bare hands nor
with metal or wet objects.
11. SPECIAL SAFETY FUNCTIONS
11.1. SELF-TEST program and error messages
Whenever the 4427 Easypace is turned on, the controlling microprocessor carries
out a fast but complete self-test of it. This includes a check for the correct operation of the
CPU, internal and external logic, memory, timer and charge levels of main and stand-by
batteries.
Messages on display may be as indicated in the table below:
MESSAGE MEANING AND ACTION
TEST IN PROGRESS Test is under way. Wait for completion thereof
TEST OK Positive test. The unit is ready for use
TEST FAIL N.# Test failed. The unit is out of order. Do not use it and contact
FIAB Technical Service
MAIN BATTERY LOW Insufficient charge of the main batteries. Replacement of
batteries is indispensable before proceeding with normal
activity
STAND-BY BATTERY
LOW
Insufficient level of stand-by batteries. Replacement of main
batteries is inhibited. After a few seconds, necessary to read
the message, the normal activity can be resumed.
Should the unit be turned off after a MAIN BATTERY LOW message, a suitable circuit
would prevent the unit to be turned on afterwards unless the same batteries are replaced.
11.2. Checking the lead connection
The unit is provided with a sentinel circuit intended to check the connection or
disconnection between the catheter and the 4427 Easypace, by measuring the voltage at
the terminals of the stimulation sockets. Such measurement is carried out only for
impulses with amplitude in the range of 2.8 to 20 mA.
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