Chapter 5 Operation
85
HIGH FLOW INSUFFLATION UNIT UHI-4
5.8 Insufflation
• Before use and after replacement of a CO
2
cylinder, allow at
least 2 L of CO
2
to flow through the insufflation tube. This
expels air from the system and ensures that only CO
2
is
insufflated.
• When a veress needle is used, select LOW flow mode before
insufflation. Insufflation in other modes is dangerous because
the cavity pressure may exceed the set pressure.
• If this instrument will not stop gas feed even when the gas
feed switch is pressed during gas feed, stop the gas supply
by turning the cylinder valve clockwise. If the CO
2
gas is
supplied from the medical gas pipeline of the hospital,
disconnect the medical gas supply hose from the CO
2
supply
port of the hospital.
The cavity may be moved by the gas fed from this
instrument. Be very careful during treatment.
Perform the syringe test, etc. to confirm that the veress
needle is properly inserted into the cavity, when a veress
needle is used. Improper insertion may result in
complications such as subcutaneous emphysema or gas
embolism.
• When using the port device for transanal access in
combination with the high flow insufflation unit, carefully read
and understand the following before using:
To avoid an excessive pressure in the lumen, do not use
this instrument with another endoscopic instrument that
feeds CO
2
gas. Immediately start suction whenever an
excessive pressure is detected.
To prevent activation of the excessive pressure caution,
do not insufflate gas from this instrument.
To decrease the pressure inside the cavity, stop
insufflation from this instrument before starting suction. If
suction was started without stopping the insufflation, auto
insufflation would start making it impossible to decrease
the pressure.
Also read the instructions manual for the port device for
transanal access.
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