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Chapter 5 Operation
HIGH FLOW INSUFFLATION UNIT UHI-3
• Smoke evacuation is not possible when the UHI-3 is set to LOW.
• Smoke is most effectively evacuated if smoke evacuation is performed
simultaneously with smoke generation.
• If the flow resistance of the connected instrument is large, or if the
suction capacity of the wall suction system is low, the smoke evacuation
function may become inoperative in order to maintain the safety of the
operation. Use an instrument with low flow resistance.
1. Connect the suction tube as outlined in Section 3.6, “Connecting the
insufflation tube and suction tube”.
2. Insert the connector of the foot switch (MH-317) into the foot switch
connector on the UHI-3’s rear panel until a click is heard (see Figure 5.3).
Figure 5.3
3. If smoke is generated inside the abdominal cavity, press the foot switch to
perform smoke evacuation. If the abdominal pressure is below 3 mmHg, the
smoke evacuation function will not operate. (If the insufflation tube is not
connected, the smoke evacuation function will not operate.)
4. If required, change the insufflation flow rate.
Flow setting Flow rate
HIGH or MED at above 10 L/min 10 L/min
MED at 6 − 10 L/min Set flow rate
MED at 1.1 − 5 L/min 5 L/min
LOW not possible
To disconnect, push this
button while pulling outward.
Foot switch