Olympus UHI-4 - Page 147

Chapter 7 Troubleshooting
141
HIGH FLOW INSUFFLATION UNIT UHI-4
• If the suction tube is correctly connected, approximately
10 seconds later, the automatic suction function will start
working. Suction will continue until the cavity pressure drops
to the set pressure.
• When relief mode is set to ON (active) and the cavity
pressure is 5 mmHg or more above the setting, the gas is
released through the internal channel until the cavity
pressure readout reaches the set pressure.
Tube obstruction
• When the tube obstruction caution lamp lights and the alarm sounds:
The reason may be that the veress needle’s distal end is clogged, the
insufflation tube has buckled, the stopcock on the veress needle is
closed or insufflation is performed into an abnormally narrow cavity,
such as subcutaneously.
• When a filter is used with the device, backward flow of body fluids (e.g.,
blood) may clog the filter and cause a tube obstruction alarm. In these
conditions, the cavity pressure cannot be measured, so immediately
check the possible reasons and remedy as appropriate.
• This caution is not performed during the STOP MODE.
Insufficient gas supply
• When the bar graph for supply pressure lights only one green LED and
the alarm sounds (approximately 1 second): The remaining gas volume
in the cylinder may be insufficient. Replace with a new cylinder as
outlined in Section 3.3, “Connecting a CO
2
cylinder”.
• When the bar graph for supply pressure lights yellow and the alarm
sounds (approximately 3 seconds followed by 10 seconds of silence):
The cylinder valve may be closed or the cylinder may be empty. If the
bar graph for cylinder pressure still does not light green after the cylinder
valve is opened, replace the cylinder with a new one as outlined in
Section 3.3, “Connecting a CO
2
cylinder”.
• When the medical gas pipeline is connected, improper hose connection
or pressure reduction in the gas supply source may cause an alarm.
Check the hose for proper connection and check the gas supply source
for normal pressure.