50
Preparation and inspection
3
Caution
If air bubbles are continuously discharged from the air/ water nozzle at the distal end of the
endoscope when the hole on the top of the air/ water feeding valve is NOT closed, stop use
immediately and replace the air/ water feeding valve with a new one. Continuous use of an air/
water feeding valve with abnormalities could cause unintended continuous air feeding and pose
a risk of pain to the patient.
5. Block the hole in the top of the air/ water feeding valve. Confirm that a steady stream of air bubbles is
being released from the air/ water nozzle on the distal end of the endoscope.
Figure 3.52
6. Check that the discharge of air bubbles stops when you remove your finger from the hole in the button
of the air/ water feeding valve.
Figure 3.53
7. Pull the endoscope out of the container, and depress the air/ water feeding valve. Check that a certain
amount of water flows out from the air/ water nozzle. (It takes a few seconds until water comes out
the first time.)
Figure 3.54
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