Extracorporeal Blood Circuit And Safety Systems - Fresenius Medical Care multiFiltrate Instructions For Use Manual

Chapter 12: Specifications

12.11 Extracorporeal blood circuit and safety systems

Pressure transducer
(art. / ven. / pre-filter
pressure)
Arterial pressure
Venous pressure
System safeguarding
against blood loss into the
environment
TMP
pF
12-14
A filled pressure transducer is identified by the fact that no more
pressure fluctuation is detected at the pressure transducer within
5 minutes (arterial and pre-filter pressure) or 2 minutes (venous).
Display range: –280 mmHg to +300 mmHg
Resolution: 20 mmHg
Accuracy: 10 mmHg
Alarm window width: 20 mmHg to 200 mmHg, size and position
adjustable around actual pressure
Display range: –80 mmHg to +500 mmHg
Resolution: 20 mmHg
Accuracy: 10 mmHg
Alarm window width: 20 mmHg to 200 mmHg, size and position
adjustable around actual pressure
Minimum alarm limits:
The optical detector senses non-opaque fluid: –20 mmHg during
treatment
The optical detector senses opaque fluid: 0 mmHg during treatment
The optical detector senses opaque fluid: –20 mmHg when
disconnecting
When the upper venous alarm limit is exceeded, the venous clamp will
not be closed to allow for release of the pressure in the system. In the
event of a simultaneous air detector alarm, the clamp will close.
Display range: –60 mmHg to +520 mmHg
Resolution: 20 mmHg
Accuracy: 10 mmHg
Alarm window width: 20 mmHg to 200 mmHg, size and position
adjustable around actual pressure
In MPS, the upper alarm limit is limited to 100 mmHg.
The TMP will be calculated using the following formula and will then be
displayed:
P + P
ven PHF
TMP = -------------------------------- - P
–
2
TMP = transmembrane pressure
Pven = venous pressure
P = pre-filter pressure
pHF
P = filtrate pressure
Fil
Display range: –60 mmHg to +520 mmHg
Resolution: 20 mmHg
Accuracy: 10 mmHg
Alarm window width: 20 mmHg to 200 mmHg, size and position
adjustable around actual pressure
The pF is calculated using the following formula and then displayed:
pF = P – P
pHF ven
Fresenius Medical Care multiFiltrate IFU-EN-UK 15A-2015
Fil