Fresenius Medical Care 5008, Operating Instructions Manual

Page: 219 / 328

Chapter 11: System Description
Fresenius Medical Care 5008 OP 5/09.06 11-9
UFC measurement At the beginning of the treatment, a measurement of the ultrafiltration
coefficient (UFC) of the dialyzer connected is performed. This value is
taken as initial value for different parameters (e.g. TMP monitoring).
If this measurement can not be performed successfully 3 times because
of malfunctions, a message will be displayed:
3
rd
invalid UFC measure-
ment with the appropriate information about possible causes. As long
as no current value is measured, a default value is used for the calcula-
tion instead of the measured value
.
Balancing Accuracy: ±0.1 % related to the total dialysate volume
Maximum balancing error
Example:
Ultrafiltration error: with 1000 ml in 1 hour: ±1 % = ±10 ml/h
Balancing error: with 30 l fluid flow in 1 hour at a dialysate flow of
500 ml/min: ±0.1 %= ± 30 ml/h
Maximum balancing error:
F = F
UF
+ F
Bil
= (±10 ml/h) + (±30 ml/h) = ±40 ml/h
Degassing Method: Negative pressure
Dialysate concentration
(conductivity) Display range: 12.8 to 15.7 mS/cm
Resolution: 0.1 mS/cm
Accuracy: 0.1 mS/cm
Method:
Temperature-compensated electronic conductivity meter with
adjustable alarm limits.
Concentrates Entering concentration types
Adjustment range: 125 to 151 mmol/l, depending on the concentrate
used ±10 % of the base value.
Bicarbonate readjustment range: corresponds to ±8 mmol/l
bi b ag
®
Bicarbonate concentrate preparation from the bi b ag
®
Temperature range: 15 to 35 °C
Dialysate temperature Adjustment range: (prescribed temperature) 34.0 °C to 39.0 °C
Resolution: 0.5 °C
Measuring accuracy: + 0.2 °C / – 0.5 °C
(measuring accuracy under calibration conditions for a dialysate flow of 500 ml/min.)
Dialysate flow Display range: 100 to 1000 ml/min
Resolution: 100 ml/min
Desired values: 100 to 1000 ml/min
Measurement by means of time pulse monitoring and balancing
chamber volume
AutoFlow: The AutoFlow function automatically regulates the dialysate
flow, depending on the dialyzer type and blood flow.
F =
F
UF
+
F
Bil
F =
Maximum balancing error
F
UF
=
Ultrafiltration error
F
Bil
=
Balancing error