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Vascular Board Review| 50 QUESTIONS| WITH COMPLETE SOLUTIONS

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2022/2023 Written for academic year
Institution Liberty University
Course Vascular
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Can CHF dampen waveforms? CORRECT ANSWERS: Yes What are limitations of doppler waveform analysis? CORRECT ANSWERS: -casts or bandages -temperature can affect waveform quality -CHF may dampen waveforms -Cannot discriminate stenosis from occlusion When a wave is reflected from a moving target, the frequency of the wave received is different (doppler shift) from the transmitted wave CORRECT ANSWERS: Doppler effect -2 PZT crystals: 1 constantly sending ultrasound, 1 constantly receiving reflected waves CORRECT ANSWERS: CW doppler What are the types of Doppler velocimetry (doppler measurements)? CORRECT ANSWERS: Analong, spectral analysis Type of Doppler velocimetry that employs a zero crossing frequency meter, to display signals graphically on a strip chart recorder CORRECT ANSWERS: Analog Type of Doppler velocimetry; individual frequencies displayed by Fast Fourier Transform (FFT) method CORRECT ANSWERS: Spectral analysis What axis is time displayed on with spectral analysis? CORRECT ANSWERS: X-axis (horizontal) What axis is frequency shifts displayed on with spectral analysis? CORRECT ANSWERS: Y- axis (Vertical) What are the characteristics of a triphasic waveform? CORRECT ANSWERS: -rapid upstroke -sharp peak -rapid downstroke -flow reversal -resumption of forward flow What are the characteristics of a biphasic waveform? CORRECT ANSWERS: -rapid upstroke -Sharp peak -fairly rapid downstroke

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