Medtronic Affinity NT Gebrauchsanweisung Seite 12

9.3. Recirculation
1. After placing tubing into a properly occluded pump raceway, remove clamp from recirculation outlet
per Figure 8 to allow recirculation between the oxygenator and venous reservoir.
2. Begin recirculation flow at 500 mL/min and gradually increase flow to 5 L/min.
3. Ensure that oxygenator is bubble-free.
4. Carefully purge any remaining air from the venous reservoir.
5. Gradually reduce flow, stop the pump, and clamp the recirculation line.
9.4. Priming A/V circuit
1. Unclamp the venous reservoir inlet line.
2. Unclamp the arterial outlet; slowly pump prime solution into the remaining circuit while carefully removing air
from the venous reservoir purge port. Purge air from the arterial sample port and access port at this time.
3. The arterial filter should now be primed per manufacturer's instructions.
4. Inspect the entire circuit and all components for leaks.
5. Upon completion of priming and debubbling, gradually reduce blood flow and stop the pump, close all purge
lines, and clamp the arterial, venous, and recirculation lines.
6. Ensure that the entire extracorporeal circuit is free of bubbles before initiating bypass.
9.5. Initiation of bypass
Warning: The blood phase pressure must be greater than the gas phase pressure at all times.
Note: Priming solution may be prewarmed through the heat exchanger before initiation of bypass.
1. Check for adequate levels of anticoagulation before initiation of bypass.
2. Remove the arterial and venous clamps and gradually increase blood flow. Then initiate gas to blood flow
ratio of 1:1 with a minimum FiO
3. Initiate water flow through the heat exchanger.
Warning: Do not allow air to enter the circuit.
9.6. Operation during bypass
1. Arterial PO is controlled by varying the percent concentration of oxygen present in the ventilating gas.
2
a. To decrease the PO
your oxygen blender.
b. To increase the PO
your oxygen blender.
2. PCO is controlled primarily by varying total gas flow rate.
2
a. To decrease PCO
10 Instructions for Use
of 80%.
2
, decrease the amount of oxygen in the ventilating gas by decreasing the FiO
2
, increase the amount of oxygen in the ventilating gas by increasing the FiO
2
, increase the total gas flow rate to increase the amount of CO
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English
Figure 8.
Figure 9.
on
2
on
2
removed.
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