FujiFilm EG-580UR Operation Manual page 66

Chapter 3 Preparation and Inspection Before Use
(2) Prepare a balloon and balloon attachment tool.
[Note]
Do not use the balloon if the expiration date has expired.
(3) Immerse the balloon into sterile water.
(4) Hold the balloon ring with your fingers and put it around
the balloon attachment tool.
(5) Insert the distal end of the ultrasonic endoscope into the
balloon attachment tool until the balloon ring fits firmly in
the balloon attachment groove.
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