i.e. when the pressure falls below the low alarm limit. It must be
observed that under certain pressure/flow conditions a blood loss to
the environment may not be able to cause the venous pressure to fall
below the low alarm limit. To avoid blood loss to the environment
it is essential to ensure that all connections in the extracorporeal
blood circuit are tight and secured, that the fistula needle is correctly
positioned and secured and that the low alarm limit is set as close as
possible to the working venous pressure.
The venous pressure measuring system is the protection against blood
loss to the environment. This measuring system is automatically
checked before each treatment. A failure will make it impossible to
start the treatment.
Blood pump
The supervision of the stop time of the blood pump is the protection
system against patient blood loss due to coagulation during treatment.
The operator will be noti fied via an attention alarm that the blood pump
stop time has been exceeded.
Blood leak detector
The blood leak detector system, which utilizes an optical sensor, is
automatically tested before each treatment for
being able to detect
transparency (no blood) and non-transparency (blood) before each
treatment. If the system cannot detect these states, it is impossible to
start the treatment.
Air detector
The air detector utilizes an ultrasonic sound sensing system in which
the transmitter is handled by one microprocessor and the receiver is
handled by both microprocessors in the protective system. The system
is tested pre-treatment for parameter deviation in terms of sensitivity
change.
Any infusion/transfusion/medication given to the patient via the
extracorporeal blood circuit of the AK 96 dialysis machine during
treatment, must pass the venous drip chamber and the activated air
detector. Instructions for infusions can be read in "Infusions during
Treatment" on page 3:36 in part 1.
Chemical disinfectant intake
The AK 96 dial
ysis machine is designed to take in chemical
disinfectants via a permanent connection. For this reason, the m achine
is equipped with an extra valve within the protective system. The
machine au
tomatically checks before each treatment if a chemical
disinfection program has previously been performed and if so, the
chemical intake valves are automatically checked during function
check. A
failure will make it impossible to start the treatment.
1:16
AK 96
®
Operator's Manual - Before you get started
HCEN12239 Revision 12.2010
Program version 3.xx
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