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4.2 Insertion
BF-190 Series OPERATION MANUAL
Ch.4
Observation of the endoscopic image
• Do not rely on the NBI observation mode alone for primary detection of lesions or to
make a decision regarding any potential diagnostic or therapeutic intervention.
• If the endoscopic image seems to be dark in the NBI observation mode, change to
the normal observation mode. Otherwise, the examination might not be done
safely.
The color tone and brightness of the NBI observation mode is different from the
WLI observation mode. Use the NBI observation only after fully understanding its
features.
Angulation of the distal end
• When rotating the insertion section, the bending section bends to a different
direction against the control section. Before operating the angulation control lever,
make sure to check the position of the projection of the insertion tube rotation ring.
Otherwise, the bending section may bend to a different direction as intended and
patient injury, bleeding, and/or perforation could result.
• Operate the UP/DOWN angulation control lever slowly while observing the
endoscopic image. Otherwise, patient injury may result.
Avoid forcible or excessive angulation, as this imposes load on the wire controlling
the bending section and may cause stretching or tearing of the wire and trouble in
the action of the bending section.
Refer to the light source’s instruction manual for instructions on how to adjust the
brightness.
Operate the UP/DOWN angulation control lever slowly to guide the distal end for
insertion and observation.
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