Ultrasound
What is color bruit artifact?
Color bruit artifacts are motion artifacts in which motion is generated within an organ rather than involving an entire organ most often due to vascular tissue vibration.
How does color bruit artifacts appear in color flow Doppler ultrasound imaging?
Speckled/mixed/mosaic pattern.
True or false? Color bruit artifact on color flow Doppler ultrasound appears as a homogeneous single color pattern.
False. Color bruit artifact appears on color flow Doppler ultrasound as multiple colors.
What causes a palpable thrill at an arteriovenous fistula region?
Arterial vascular pulsations.
How are color Doppler and pulse repetition frequency (PRF) gains optimization important in the assessment of color bruit artifacts?
Too much color gains or too much PRF gains may result into augmented speckles/color signals hence leading to misdiagnosis.
At the anastomosis/fistulation point of the left proximal anterior elbow, of the brachial artery and the cephalic vein, color Doppler mapping reveals speckled/mixed signals of color hues ranging from deep blue, to sky blue, to orange, to yellow consistent with color bruit artifacts primarily attributed to both the arterial and the venous intra-luminal flows.
Pulsed Doppler assessment of the fistula point exhibits turbulence and pulsatile venous flow downstream from the arteriovenous (AV) connection (expected). No aneurysmal change, peri-fistula collections or thrombosis.
There is subcutaneous tissue edema of the left upper limb with echogenic fat pads interspersed with hypoechoic linear fluid spaces akin to a labyrinthine pattern appearance.