Operating Manual
PRODUCT DESCRIPTION
Software 2.6
B|BRAUN
Chapter 2
Page 3 of 15
SHARING EXPERTISE
2.6_CA-EN_03
2.2 FUNCTION
The blood pump (BP) delivers the blood from the patient’s venous access to the plasma filter. The blood
flow is controlled via an arterial pressure transducer (PA). The heparin pump (HP) controls the heparin
output for anticoagulation in the arterial line. The blood inlet pressure into the plasma filter is
monitored via the prefilter pressure (PBE) of the arterial air chamber.
Blood that is separated in the plasma filter is returned via the venous line to the venous air chamber
where it is mixed with the treated plasma which flows back via the reinfusion line. The reinfusion
volume is equivalent to the volume of the separated plasma. The venous air chamber monitors blood
reinfusion via a venous pressure transducer (PV). The venous line is monitored by a safety air detector
(SAD) and closed by a safety air clamp (SAK) as soon as air is detected in the system.
The separated plasma is monitored after the plasma filter by a blood leak detector (BLD). Plasma flow is
regulated via measurement of plasma pressure (PPL).
Plasma and heparinized acetate buffer are delivered via a plasma/buffer pump (PBP), in which a double
pump segment is inserted, to the precipitate air chamber. Plasma and heparinized acetate buffer are
mixed at a ratio of 1:1. The resulting precipitate is filtered in the subsequent precipitate filter. The
precipitate filter pressure transducer (PPF) monitors the inlet pressure of the precipitate filter. The
precipitate air chamber level valve and sensor control the fluid level in the precipitate air chamber.
The filtrate which is free from LDL is routed via the heparin adsorber air chamber to the heparin
adsorber where the excessive heparin is removed. The heparin air chamber level valve and sensor control
the fluid level in the heparin air chamber. The automatic clamp (HAK) in front of the heparin adsorber
closes in case of a bypass during therapy.
In the dialyzer, the plasma is dialyzed with a sterile bicarbonate solution at a ratio of at least 1:4. The
physiological pH-value of the plasma is restored and the induced volume removed by dialysis and
ultrafiltration. The dialyzer pressure (PDF) monitors the inlet pressure of the dialyzer. The ultrafiltration
rate, bicarbonate dialysate and buffer solution are balanced by the load cell (LC).
Dialysate is delivered via the dialysate pump (DP). The solution is heated in a plate warmer before
flowing through the dialyzer. The dialysate air detector (DAD) detects air in the dialysate line. The
pressure on the dialysate side is monitored via the inlet pressure of the dialysate (PDI).
After dialysis, plasma is delivered via the reinfusion pump (PRP) to the venous air chamber and together
with the blood from the plasma separation is reinfused to the patient via the venous line.