Scanning Basics Flashcards
multiple advantages of ultrasound
visualize anatomic structures beneath the skin
detect aberrant anatomy
observe needle movements in real time
what are the 3 main components of ultrasound systems?
transducer, image processor, and monitor
in B - mode imaging, short axis view is also
transverse view, cross sectional view
in B - mode imaging, long axis view is also
longitudinal view, sagittal plane view
transducers are either
sector, curvilinear, or linear array
which basic functions optimize image resolution?
depth, gain, and color flow doppler
which transducer provides the best resolution for an ultrasound guided radial artery catheter insertion?
linear array transducer
the transducer is oriented to the anesthetist’s ____ in transverse view and towards ___ in sagittal view
left; the patient’s head
five ways a transducer can be manipulated
sliding, tilting, rocking, rotating, compressing
sliding movements
proximal and distal to the intended target site to ensure patency of the vessel
rocking movements
lateral movement along face of transducer
axis of beam doesn’t change, reduce, or eliminate air artifact
tilting movements
changes axis of beam in relation to tissues being imaged
aligns sound beam so that it is perpendicular to structure of interest
gain
compensates for attenuation
it amplifies RETURNING echoes
adjusted so the image contrast is uniform
increasing the depth ____ the resolution
decreases
what is the advantage of in plane need insertion over out of plane needle insertion?
the entire needle is visualized during the procedure
