– 35 –
The examples above are indications that service is required to avoid
more serious problems with the angulation control system, including the
possibility of a “frozen” distal bending section.
A “frozen” bending section can make instrument extraction from a patient
more difcult.
6) Insufflation should be controlled by the combined use of the air/water feeding
valve to increase the amount of insufation and the suction control to decrease
the level of insufation.
WARNING:
Be careful not to deliver too much air.
It must be recognized that variations in air flow (pressure and volume)
for patient insufflation may exist from one manufacturer’s equipment
(light source, video processor and/or endoscope type) to another. It is,
therefore, important to closely monitor the patient at all times to prevent
the pain and/or gas embolism that is caused by excessive air aspiration.
7) Procedures involving poorly prepped patients should be avoided as excessive
patient material can negatively affect certain endoscope channel functions as well
as the ability to maintain a clear endoscopic view.
8) Mucous, fluids and/or other patient material should be aspirated via the
instrument/suction channel and suction control valve to improve visualization.
Maintain a clear view during aspiration, avoid prolonged suction time and use the
minimum level of negative pressure required to perform the clinical procedure.
CAUTION:
Do not apply excessively negative pressures (high suction settings) and/
or prolonged contact of the distal instrument channel opening (endoscope
tip) against mucosal surfaces to avoid “suction polyps”, bleeding and/or
other trauma to the patient. During aspiration keep an endoscopic view
of patient anatomy as clear as possible and maintain some distance from
endoscope tip to tissue to avoid suctioning of mucosa onto/into the distal
channel opening.
CAUTION:
Avoid suctioning foreign objects and solid particles that are large enough
to potentially clog the Suction Channel and Suction Control Valve. If such
objects and/or particles have been suctioned into the endoscope, insure
that they have been completely removed from the endoscope before
continuing to use it. If the Suction Control Valve has been clogged to the
extent that it is not possible to stop the suctioning operation, detach the
Suction Source Tube that is attached to the endoscope from the suction
source, detach the Suction Control Valve from the endoscope, and remove
any trapped debris that might be preventing the Suction Control Valve
from operating properly.
If it is impossible to conrm that all foreign objects and solid particles have
been removed from the Suction Channel, do not use the endoscope and
contact your local PENTAX service facility.
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