Olympus Evis Exera II Instructions Manual page 58

Chapter 3 Preparation and Inspection
Inspection of the objective lens cleaning function
54
4.
Uncover the hole in the air/water valve and confirm that no air bubbles are
emitted from the air/water nozzle.
If a stream of air bubbles is emitted from the air/water nozzle
even though the air/water valve is not being operated and the
distal end of the insertion tube is 10 cm or more below the
surface of the sterile water, there may be an irregularity in the
air feeding function. If the endoscope is used while air is
continuously fed, over-insufflation and patient injury may
result. If air bubbles are emitted from the air/water nozzle,
remove and reattach the air/water valve correctly, or replace
it with a new one. If this fails to stop air bubbles from being
emitted, do not use the endoscope, as there may be a
malfunction. Contact Olympus.
When the distal end of the insertion tube is immersed less
than 10 cm below the surface of the sterile water, a small
amount of air bubbles may be emitted from the air/water
nozzle even when the air/water valve is not operated. This
does not indicate a malfunction.
Use sterile water only. Non-sterile water may cause patient
cross-contamination and/or infection.
• When the air/water valve is depressed for the first time, it
may take a few seconds before water is emitted.
• If the air/water valve returns to its original position slowly
after water feeding, remove the air/water valve and moisten
the seals with sterile water.
• During the inspection, place the distal end of the endoscope
in a beaker or other container so that the floor does not get
wet.
1.
Keep the air/water valve's hole covered with your finger and depress the
valve. Observe the endoscopic image and confirm that water flows on the
entire objective lens.
2.
Release the air/water valve. Observe the endoscopic image and confirm
that the emission of water stops and that the valve returns smoothly to its
original position.
EVIS EXERA II GIF/CF/PCF TYPE 180 Series OPERATION MANUAL