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• EUROSETS recommends using the pump
speed regulator to reduce or slowly stop the
arterial flow.
• Do not use the pump on/off switch until the
pump speed is zero.
I. INITIATING BYPASS
1) OPENING THE ARTERIAL AND VENOUS LINES
First remove the clamp from the arterial line
and then the clamp from the venous line. Start
bypass with a blood flow appropriate for the
patient's size. Constantly check the blood level in
the cardiotomy/venous reservoir. If performing
vacuum-assisted drainage (VAVD), please read
carefully section L of these instructions for use.
J. DURING BYPASS
1) CHECKING THE VENOUS RETURN
If a higher venous return flow is necessary, lower
both the oxygenator and the cardiotomy/venous
reservoir respect to the patient's position.
If
performing
(VAVD), please read carefully section L of these
instructions for use.
WARNINGS
• The ACT (Activated Coagulation Time)
must always be greater than or equal to
480 seconds in order to ensure adequate
anticoagulation of the extracorporeal circuit.
• If administration of anticoagulant to the
patient is necessary, use the luer connector
of the central stopcock (white handle) on the
sampling manifold.
• The cardiotomy/venous reservoir minimum
operating volume is 200 ml at 8 l/min and 150
ml at 5 l/min. Minimum operating volume is
yellow highlighted on the reservoir volume
graduated scale. To allow sufficient reaction
time in case of sudden venous flow stop,
preventing gaseous emboli passing to the
patient, it is recommended to maintain the
operating level at the double of the minimum
operating volume.
• It is recommended to monitor the cardiotomy/
venous reservoir volume using a reservoir
level sensor.
2) CARDIOTOMY/VENOUS
MANAGEMENT
If
performing
(VAVD), please read carefully section L of these
instructions for use. If you need to add priming
34
vacuum-assisted
drainage
RESERVOIR
vacuum-assisted
drainage
solution to the venous reservoir, use the 1/4" or
the luer-lock or the Pos-lock ports located on the
turrets of the cardiotomy/venous reservoir.
WARNING
• If you wish to change from vacuum-assisted
drainage to conventional venous drainage
please read carefully section L of these
instructions for use.
K. TERMINATING BYPASS
This must be carried out depending on the condition
of each individual patient.
CAUTION
If extracorporeal circulation has to be restarted,
maintain a minimum blood flow inside HORIZON
CVR reservoir.
L. BLOOD RECOVERY AFTER BYPASS
1) Recover all the blood contained in the venous line
into the cardiotomy/venous reservoir as soon as
the surgeon has removed the cannula from the
patient's vena cava.
2) Perfuse through the aortic cannula as required
by the patient's condition, slowly decreasing the
level in the cardiotomy/venous reservoir.
3) If desired, blood in the oxygenator may also be
returned by adding clear prime to the venous
reservoir when the blood in the reservoir has
reached the minimum volume. Pump the prime
slowly through the oxygenator ensuring that the
reservoir never be emptied.
4) When the cardiotomy/venous reservoir is nearly
empty, stop the arterial pump and clamp the
arterial line.
M. USE OF THE VACUUM-ASSISTED VENOUS
DRAINAGE TECHNIQUE (VAVD)
The device can be used with vacuum-assisted
drainage as it is fitted with a pressure relief valve.
To apply safely a vacuum to the device, carefully
read the following instructions for use.
1) CONNECTING THE VACUUM LINE
If performing venous drainage using the vacuum-
assisted technique (VAVD), the vacuum line must
be connected to the VENT/VACUUM port. Ensure
that label and yellow protection cap have been
removed from VENT/VACUUM port.
Connect the Eurosets VAVD connection kit (figure
