・ Carefully adjust the pump speed to control the
blood flow, because the blood flow varies
depending on the load applied to the pump (the
patient's arterial pressure, resistance of the circuit).
・ Control blood flow by adjusting the pump speed.
Partially clamping the outlet of the pump to control
the blood flow may increase the blood damage.
・Entry of massive air into the pump will cause the
pump
to deprime and the blood flow to stop.
When resuming circulation, stop the pump
once and remove the air.
・ After-load pressure higher than the pump's outlet
pressure causes back flow. When decreasing
the pump speed, adjust the pump speed
taking care not to cause back flow.
1.
Collect blood from the sampling line of the oxygenator
(Figure 21).
Never collect blood from branch lines of the arterial
line (red) and the venous line (blue). Otherwise,
bubbles may enter the circuit.
2.
Measure blood gases and make necessary adjustments as
follows:
a)
Control PaO
2
by changing concentration of oxygen in
ventilating gas using gas blender.
-
To decrease PaO
2
, decrease FiO
2
.
-
To increase PaO
2
, increase FiO
2
.
b)
Control PaCO
2
by changing the total gas flow.
-
To decrease PaCO
2
, increase total gas flow.
-
To increase PaCO
2
, decrease total gas flow.
•
A minimum of 0.5L/min oxygen gas flow is needed
when blood is circulated. Less than 0.5L/min oxygen
gas flow may result in inadequate gas exchange.
Figure 21
CAUTION
WARNING
CAUTIONS
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