FujiFilm EB-530US Operation Manual page 77

(1) Check to confirm the site to be punctured using the
Ultrasonic Endoscope.
(2) Contact the transducer at the distal end of Ultrasonic
Endoscope near the puncturing point.
(3) If a balloon is used, contract it until it is small but not
touching the puncture needle, by observing the endoscope
image.
(4) Observe the target lesion with the ultrasonic image.
Chapter 6 Method of Use
6-13