Olympus UHI-4 - Alarm Functions

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Chapter 7 Troubleshooting
HIGH FLOW INSUFFLATION UNIT UHI-4
7.2 Alarm functions
Excessive pressure
• To prevent gas embolism caused by intra-cavity
over-pressurization from the combined use of an insufflator
and a laser device, argon-enhanced coagulator, or other gas
supply devices, carefully read and understand the following
before using.
 When performing endoscopy using the insufflator and a
laser device, argon-enhanced coagulator, or other gas
supply devices simultaneously, both devices become a
source of supply for gas. Accordingly, the desired
pressure in the cavity is reached in a shorter time than
when a pneumoperitoneum device is used alone. Be
careful that the cavity does not become over-pressurized.
The laser device, argon-enhanced coagulator, and other
gas supply devices are not equipped to monitor the cavity
pressure (automatic termination of insufflation, caution
lamp or alarm). Although the insufflator is equipped with
these functions, it does not always prevent gas embolism
inasmuch as this depends on the patient and the
condition of the infected area. We ask that the physicians
make a suitable judgment from a professional standpoint.
 If the insufflator emits a caution (caution lamp or alarm)
for intra-cavity 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-cavity
over-pressurization.
• Carefully monitor the patient’s condition. Patients coming out
of anesthesia may have increasing cavity pressures.
• When the excessive pressure caution lamp lights and the
alarm sounds:
The pressure within the cavity is 5 mmHg or more above the
set pressure. Immediately perform the appropriate remedial
actions.