
Isolated UF - General
Isolated UF (ultra
fi
ltration) can be performed before, during or after
the hemodialysis treatment. Instructions for each combination can
be read further on in this chapter.
When performing isolated UF, there is no diffusion. This is because
the dialysis
fl
uid in this phase bypasses the dialyzer, and the machine
therefore only performs ultra
fi
ltration.
Note especially that due to the dialysis
fl
uid bypass during isolated UF,
the blood cannot maintain its temperature in the same way as it does
during the diffusion phase.
As the UF rate is high during the isolated UF phase, it is recommended
to optimize the blood
fl
ow rate, within the limits suitable for the
patient, to avoid hemoconcentration in the dialyzer and the blood lines.
Isolated UF can be used if the amount of excessive
fl
uid to be removed
is too large for the speci
fi
c patient to tolerate during hemodialysis
(diffusion). It can also be used if the patient's condition requires
immediate
fl
uid removal.
The hemodialysis treatment is in this context referred to as "the
diffusion phase" and the isolated UF is referred to as "the isolated UF
phase".
The time and UF volume in isolated UF is automatically added to the
diffusion phase and consequently increases the complete treatment
time and the total UF volume. This is on condition that the machine's
manufactured preset (the default preset) has not been changed. It is
possible to change the preset so that time and UF volume will be
included instead of added. The following instructions are based on the
default preset.
6:2
AK 96
®
Operator's Manual - Isolated UF
HCEN12239 Revision 12.2010
Program version 3.xx
Summary of Contents for AK 96
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