Chapter 5 Operation
47
HIGH FLOW INSUFFLATION UNIT UHI-3
−
If the insufflator emits a warning (warning light or alarm)
for intra-abdominal over-pressurization, quickly open the
stopcock or valve of the trocar.
In this event, reduce the amount of outflow from the laser
device, argon-enhanced coagulator, or other gas supply
device.
If use is continued while the alarm is sounding, there is a
risk of gas embolism due to intra-abdominal
over-pressurization.
• Never connect the suction tube and the insufflation tube to
the same veress needle or trocar. Doing so will impede
measurement of the abdominal pressure which may result in
excessive abdominal pressure, or make it impossible to
maintain the selected abdominal pressure.
• Confirm that the suction tube is securely connected so that it
will not become dislodged during use. If the suction tube is
detached from the suction control pinch valve or the
connection is incorrect, continuous suction may occur. This
may prevent operators from maintaining the selected
abdominal pressure.
• Confirm that the suction tube (especially the thin part inserted
into the pinch valve) is free of twists, folds, and collapsed
areas. Such anomalies will prevent appropriate suction.
• Always connect to a suction pump with a capacity of at least
40 L/min (at 0
°
C, 101.3 kPa) and adjust to
−
400 to
−
300 mmHg. If the flow rate suction pressure is not between
−
500 to
−
300 mmHg automatic suction will not operate
normally.
• Always use suction tube (MAJ-591). Using any other tube will
not only impair performance, but may lead to incorrect
operation.