which of the following statements is false regarding intraoperative duplex evaluation during carotid endarterectomy - Answer- due to the increased attenuation of sound caused by air in the extra cranial vessels, the lowest probe frequency available is preferred for the exam
which renal arteries ...
which of the following statements is false regarding intraoperative duplex evaluation during carotid endarterectomy
which renal arteries are evaluated with doppler in an ultrasound
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CCI Practice Test #2
which of the following statements is false regarding intraoperative duplex evaluation
during carotid endarterectomy - Answer- due to the increased attenuation of sound
caused by air in the extra cranial vessels, the lowest probe frequency available is
preferred for the exam
which renal arteries are evaluated with Doppler in an ultrasound exam that is used to
perform a direct evaluation for renal artery stenosis - Answer- main renal artery
if you are performing an arterial Doppler exam on the lower extremities and
inadvertently select the lower extremity venous preset on the machine, how will this
affect your exam? - Answer- aliasing of the arterial waveforms will occur
the supraorbital artery is a direct branch from the _______________ and joins the
_______________ which is a branch of the ECA - Answer- ophthalmic artery,
superficial temporal artery
venography is usually performed with the patient in what position - Answer- supine with
table at 60 degree reverse Trendelenberg
which transcranial window is most commonly used to evaluate the carotid siphon and
the ophthalmic artery - Answer- orbital
all of the following are branches of the opthmalic artery, except - Answer- posterior
auricular artery
which of the following causes an increase in the resistive Index(RI) of the distal common
carotid artery - Answer- 90% proximal ICA stenosis
when evaluating suspected thoracic outlet syndrome, a PPG exam can be performed
with he transducer placed on the __________ or a Doppler can be performed with the
transducer placed - Answer- 2nd digit, on the radial artery
a patient presents for a mesenteric Doppler to rule out stenosis. they have a history of
diabetes, HTN, pain and nausea post-prandially. which of the following times would be
best for this exam to be scheduled - Answer- 8am, NPO 6-8hrs prior
a patient complains of right leg pain and color changes in the leg. when he lies down,
the entire right leg become pale. when he sits up on the edge of the bed, the entire right
leg become reddened. the left leg is asymptomatic. what is the most likely cause of
these color changes - Answer- signifiant right iliac stenosis
, during a color evaluation of the common femoral vein, the patient is asked to perform
the Valsalva maneuver. the cephalic flow indicated by the blue color in the CFV
immediately disappears until the patient releases their muscles. the blue color returns
and completely fills the vessel. what do these color Doppler findings indicate - Answer-
the response described is a normal result for the CFV
all of the following are benefits of a lower extremity arterial exam, except: - Answer-
provides pressure information at 3 or more levels in the legs
why is an acute arterial occlusion in the lower extremity considered a critical finding -
Answer- the collaterals have not had time to redistribute the blood
what is the primary factor that determines the resistance characteristics of the arterial
signal displayed by PW Doppler - Answer- part it is supplying
quality assurance tasks required by ICAVL for lab accreditation include all of the
following, except: - Answer- record of all informed consent forms for patients that
underwent interventional procedures
which of the following statements best describes the Doppler tracing found in the stalk
of a pseudoaneurysm - Answer- high resistance to and fro flow
____________ is the term used to describe the concentric layers of blood flow within a
normal vessel - Answer- laminar flow
what is the gold standard method of diagnosing temporal arteritis - Answer- biopsy
a mesenteric to aortic ratio is considered normal when it is - Answer- 1.0 or less
all of the following are potential causes of a false negative diagnosis of ICA stenosis,
except: - Answer- tortuosity
_______________ uses a catheter with a rotating head and suction capabilities to break
up the plaque and remove it from the artery - Answer- an atherectomy procedure
which of the following exams does not use PW or CW Doppler - Answer- pulse volume
recording
which artery supplies the brainstem with arterial blood - Answer- basilar artery
why would exposure to cold increase symptoms of lower extremity arterial stenosis -
Answer- increased resistance due to vasoconstriction
the ECA is normally ______________ to the ICA - Answer- medial
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