Chapter 5: Alarm processing
5-12 Fresenius Medical Care multiFiltrate IFU-EN-UK 15A-2015
5.10 Ratio of UF rate to BP rate
After a short period of time, the alarm limits
will be set to the previous limits.
or
 Press the [START/RESET] key again.
The alarm limit will be set around the current
actual value.
Note
High filtrate rates in combination with low blood flow rates may lead to
an inadequate concentration of blood in the haemofilter (massive
increase of the TMP). To a great extent, the blood concentration
required depends on the individual haemofilter. For this reason, there is
a general risk of clotting in the capillaries.
To avoid this reaction, it is advisable to set the UF rate in postdilution so
as not to exceed 20% of the BP rate.
Substituate + ultrafiltration = UF rate
2000 ml/h + 200 ml/h = 2200 ml/h
= 36.6 ml/min
At a BP rate of 150 ml/min, this equals a
UFR / BPR of 24.4%.
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