Esaote O-scan eXP, User Manual

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30 / 48 Chapter 3
Special Precautions for Patient Positioning
When used properly for examinations within the scope of its intended use,
O-scan can be used safely and effectively for most patients. However, the
compact design of the system implies a number of dimensional
restrictions that may limit or exclude the possibility of patient
examinations.
☛
Size constraints of the gantry, dimensions of the magnet and of the
receiving coils - see chapters 8 and 10.
☛
Size constraints of the magnet homogeneity region. See chapters
“Positioning Protocols” further on in this manual, “Image Quality in MR”
and “Examination protocols and sequences” in the user manual MR
Quality and Sequences.
W a r n i n g
It is the full responsibility of the user to ensure that the dimensions of
the anatomical region of the patient to be examined are compatible
with that of the gantry and the coil required for the examination.
It is also the full responsibility of the user to verify that the examination
can be performed without excessive vascular or nervous pressure, or
impaired patient comfort and well-being.
The User should ask the patient if he or she has any nerve-related
impairments or back or leg problems prior to deciding how to position
the patient. If such conditions are present, the User may determine not
to use the device.
W a r n i n g
If the coil is too small with respect to the size of the limb, it may exert
pressure on the nervous and/or vascular structures of the limb under
examination.
In particular, when performing knee examinations, the User is advised
to use caution in order to avoid compression of the postero-lateral site
of the external sciatic-popliteal nerve, especially the area
corresponding to the proximal tibial-fibular joint.
Sciatic-popliteal nerve compression may cause temporary or
permanent impairment of the leg.