Chapter 5 Operation
87
HIGH FLOW INSUFFLATION UNIT UHI-4
• If smoke evacuation continues for an extended period of
time, a large amount of CO
2
will be exchanged and the
patient’s body temperature may drop. Always prepare
temperature monitoring equipment and closely observe the
patient’s body temperature and other parameters. Also
observe the volume indicator to monitor the amount of CO
2
used during the operation.
• Confirm that the suction tube is securely attached. If the
suction tube becomes disconnected, CO
2
discharge will not
be possible. In this case, further supply of CO
2
will increase
the cavity pressure.
• Connect the suction tube after the insufflation tube has been
connected. If only the suction tube is connected, smoke
evacuation and the automatic suction function will cause the
cavity pressure to drop and the pressure cannot be restored
by insufflation.
• Never connect any other equipment to the foot switch
connector.
• Before pressing a foot switch, be sure to confirm that it is the
right switch. Otherwise, unintended output may be generated
from a wrong unit.
• In the following cases, the safety function disables the
automatic smoke evacuation system/function even during
output.
When the abdominal cavity pressure is below about
2 mmHg.
When the flow mode of the high flow insufflation unit is
“Low”
When the high flow insufflation unit is in the gas flow stop
mode.
When this instrument is in the excessive pressure caution
status.
When this instrument is in the tube obstruction caution
status.
When the insufflation tube is not connected to the patient
because of the need of inspection, etc.
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