Fresenius Medical Care 5008, Руководство по эксплуатации

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Chapter 11: System Description
Fresenius Medical Care 5008 OP 5/09.06 11-33
The illustration (Influence of the RBV on the UF rate) shows an example
of a treatment performed with UF rate control depending on the blood
volume.
The BVM rate is initially higher than during a treatment performed
without control.
In the later phase of the treatment, the BVM rate then will be
continuously reduced, preventing the blood volume from falling below a
predefined value which is individually critical for each patient (crit. RBV).
Whereas the blood volume is not monitored during a treatment with a
constant UF rate or with a UF profile - representing a permanent risk of
a blood pressure drop due to insufficient refilling - this treatment mode
is characterized by continuous monitoring of the RBV. Each event and
each measure having an effect on the blood volume will be detected. As
a countermeasure, the BVM rate may be reduced immediately in case
of unfavorable changes of the blood volume. Continuous monitoring
and control therefore result in a significant improvement of the patients'
stability and well-being, especially for patients suffering from blood
circuit instability.
The BVM rate may be limited depending on the blood pump rate and the
measured hematocrit, to avoid a too important hemoconcentration in
the dialyzer.