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bk3000 User Guide (16-01249-EN-01) Safety Information
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VFI - Vector Flow Imaging
1
Puncture and Brachytherapy
1. Vector Flow Imaging on the bk3000 has not been market cleared by the FDA or licensed by Health Canada.
Artifacts
WARNING VFI-w1
Before you turn on VFI, check the B-mode image to make sure there are no artifacts visible
in the blood vessel. If there are strong artifacts in the B-mode image, the arrows in VFI may
be pulled to point in a more axial direction (toward or away from the transducer),
especially in low flow situations with correspondingly low PRF. These artifacts will not
affect the color mode (CFM) image, so it is important to check in B-mode.
Arrow
aliasing
WARNING VFI-w2
Check to make sure the VFI arrows are not aliasing before you activate the assisted
Doppler gate placement. Otherwise, the Doppler gate will not be positioned correctly.
Diameter
markers
WARNING VFI-w3
Check to make sure that the diameter markers correspond to the inner vessel wall and that
the connecting line between the markers is perpendicular to the direction of the vessel.
Otherwise, the real-time volume flow measurement may not be precise.
Doppler gate
large
enough
WARNING VFI-w4
Check to make sure that the Doppler gate covers the entire vessel. Otherwise, the real-
time volume flow measurement may not be precise.
Doppler gate
over only
one vessel
WARNING VFI-w5
Check to make sure that the Doppler gate only covers one vessel. Otherwise, the real-time
volume flow measurement may not be precise.
Doppler
spectrum
aliasing
WARNING VFI-w6
Check to make sure that the Doppler spectrum does not alias. Otherwise, the real-time
volume flow measurement may not be precise.
Verify
transducer
type number
WARNING P-w1
Before you start to imaging, verify that the type number or description of the puncture
attachment you are using match the number displayed on the monitor. Also make sure
that the needle guide is positioned correctly. If the numbers do not match, or if the needle
guide position is not correct, the puncture line on the monitor may not correspond to the
true puncture path in the tissue. In case of any inconsistency, stop imaging, turn off the
system, and contact your local BK Medical representative.