Vascular Final Study Guide Part 1
1.
When scanning in the transverse plane, the ECA is usually ________ to the ICA
A.
Medial
B.
Lateral
Correct Answer
A. Medial
Explanation
When scanning in the transverse plane, the ECA is usually medial to the ICA. This means that
the external carotid artery (ECA) is located closer to the midline of the body compared to the
internal carotid artery (ICA).
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2.
,What does tapping of the temporal artery branch do to the ECA waveform?
A.
Causes a systolic pressure change
B.
Causes changes in the diastolic flow pattern
C.
Has no effect on the ECA, but affects diastolic flow in the ICA
D.
None of the above
Correct Answer
B. Causes changes in the diastolic flow pattern
Explanation
Tapping of the temporal artery branch causes changes in the diastolic flow pattern. This means
that the flow of blood during the diastolic phase of the cardiac cycle is altered when the
temporal artery branch is tapped. This tapping may result in changes in the velocity or direction
of the blood flow during diastole, which can be observed in the waveform of the external
carotid artery (ECA). It is important to note that tapping the temporal artery branch does not
have any effect on the ECA during systole or on the diastolic flow in the internal carotid artery
(ICA).
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,3.
A phenomenon associated with pulsed Doppler, which is a misrepresentation of the Doppler
shift in a negative direction, and occurs when the Doppler shift frequency exceeds one-half the
PRF is called
A.
Flow reversal
B.
Resistance
C.
Turbulence
D.
Aliasing
Correct Answer
D. Aliasing
Explanation
Aliasing is a phenomenon associated with pulsed Doppler where the Doppler shift is
misrepresented in a negative direction. This occurs when the Doppler shift frequency exceeds
one-half the Pulse Repetition Frequency (PRF). In other words, when the Doppler shift is too
, high, it wraps around and appears as a negative value, causing aliasing. This can lead to
incorrect interpretation of blood flow direction and velocity. Hence, the correct answer is
aliasing.
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4.
What are the typical color assignments for blood flow in relation to the transducer?
A.
RED = Blood Flow Towards BLUE = Blood Flow Away
B.
BLUE = Blood Flow Towards RED = Blood Flow Away
Correct Answer
A. RED = Blood Flow Towards BLUE = Blood Flow Away
Explanation
The typical color assignments for blood flow in relation to the transducer are red for blood flow
towards and blue for blood flow away. This color scheme is commonly used in medical imaging,
such as Doppler ultrasound, to represent the direction of blood flow. Red is used to indicate
blood flowing towards the transducer, while blue is used to indicate blood flowing away from
the transducer. This color coding helps healthcare professionals visualize and interpret the
direction of blood flow in real-time.
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5.
The Doppler Shift is a function of what variables?
1.
When scanning in the transverse plane, the ECA is usually ________ to the ICA
A.
Medial
B.
Lateral
Correct Answer
A. Medial
Explanation
When scanning in the transverse plane, the ECA is usually medial to the ICA. This means that
the external carotid artery (ECA) is located closer to the midline of the body compared to the
internal carotid artery (ICA).
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2.
,What does tapping of the temporal artery branch do to the ECA waveform?
A.
Causes a systolic pressure change
B.
Causes changes in the diastolic flow pattern
C.
Has no effect on the ECA, but affects diastolic flow in the ICA
D.
None of the above
Correct Answer
B. Causes changes in the diastolic flow pattern
Explanation
Tapping of the temporal artery branch causes changes in the diastolic flow pattern. This means
that the flow of blood during the diastolic phase of the cardiac cycle is altered when the
temporal artery branch is tapped. This tapping may result in changes in the velocity or direction
of the blood flow during diastole, which can be observed in the waveform of the external
carotid artery (ECA). It is important to note that tapping the temporal artery branch does not
have any effect on the ECA during systole or on the diastolic flow in the internal carotid artery
(ICA).
Rate this question:
,3.
A phenomenon associated with pulsed Doppler, which is a misrepresentation of the Doppler
shift in a negative direction, and occurs when the Doppler shift frequency exceeds one-half the
PRF is called
A.
Flow reversal
B.
Resistance
C.
Turbulence
D.
Aliasing
Correct Answer
D. Aliasing
Explanation
Aliasing is a phenomenon associated with pulsed Doppler where the Doppler shift is
misrepresented in a negative direction. This occurs when the Doppler shift frequency exceeds
one-half the Pulse Repetition Frequency (PRF). In other words, when the Doppler shift is too
, high, it wraps around and appears as a negative value, causing aliasing. This can lead to
incorrect interpretation of blood flow direction and velocity. Hence, the correct answer is
aliasing.
Rate this question:
4.
What are the typical color assignments for blood flow in relation to the transducer?
A.
RED = Blood Flow Towards BLUE = Blood Flow Away
B.
BLUE = Blood Flow Towards RED = Blood Flow Away
Correct Answer
A. RED = Blood Flow Towards BLUE = Blood Flow Away
Explanation
The typical color assignments for blood flow in relation to the transducer are red for blood flow
towards and blue for blood flow away. This color scheme is commonly used in medical imaging,
such as Doppler ultrasound, to represent the direction of blood flow. Red is used to indicate
blood flowing towards the transducer, while blue is used to indicate blood flowing away from
the transducer. This color coding helps healthcare professionals visualize and interpret the
direction of blood flow in real-time.
Rate this question:
5.
The Doppler Shift is a function of what variables?
