Chapter 5 Operation
99
HIGH FLOW INSUFFLATION UNIT UHI-4
• 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 cavity
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 or vacuum line with a
capacity of at least 40 L/min (at 0C, 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.
• After connecting the suction tube, automatic suction will start
operating if an additional veress needle or trocar, etc. is
inserted (due to the momentarily high cavity pressure). To
prevent the suction function from activating, either disconnect
the suction tube, close the stopcock on the trocar to which
the suction tube is connected or press the STOP switch.
• Always use suction tube (MAJ-591). Using any other tube will
not only impair performance, but may lead to incorrect
operation.
1. Ensure that the suction tube is connected properly as described in Section
3.9, “Connecting the insufflation tube and suction tube” on page 58.
2. When the cavity pressure exceeds the set pressure by 5 mmHg, the
excessive pressure caution lamp will light and an alarm will sound. If the
pressure is exceeded for 10 seconds or longer, automatic suction will be
performed until the cavity pressure drops to the set pressure.
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