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Transcranial Doppler Sonography Exam Practice Questions with complete Solutions Graded A+ $7.99   Add to cart

Exam (elaborations)

Transcranial Doppler Sonography Exam Practice Questions with complete Solutions Graded A+

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  • Course
  • Vascular Sonography
  • Institution
  • Vascular Sonography

Transcranial Doppler Sonography Exam Practice Questions with complete Solutions Graded A+ Transcranial Doppler (TCD) - Answers Measure blood velocities in the basal arteries and the circle of Willis. Evaluate Vascular Abnormalities. TCD Instrumentation - Answers 2 MHz, pulsed wave doppler with a...

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  • October 8, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Vascular Sonography
  • Vascular Sonography
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TutorJosh
Transcranial Doppler Sonography Exam Practice Questions with complete Solutions Graded A+

Transcranial Doppler (TCD) - Answers Measure blood velocities in the basal arteries and the circle of
Willis.

Evaluate Vascular Abnormalities.

TCD Instrumentation - Answers 2 MHz, pulsed wave doppler with a good directional resolution, small
sample volume and 0 degree angle .

Transcranial color-coded duplex sonography

(TCCS) - Answers Combine B-mode imagining with Color flow and doppler.

TCCS technique - Answers Allow angle-corrected measurement of velocities.

Use 1.8-3.6 MHz phase array sector transducer.

3D TCCS - Answers Power-based

Use ultrasound contrast to enhance images.

Contrast agent - Answers Addition of contrast agent during TCD.

Improve the evaluation of intracranial blood flow.

Additional instrument requirement - Answers Narrow bandwidth

Large SNR

Transmitting Power between 10-100 mW/cm/sec

PRF < or = 20KHz

Adjustable doppler gate depth.

Capabilities of TCD - Answers Detection of Intracranial stenosis & occlusion.

Monitoring of Intracranial vessels.

Other capabilities of TCD - Answers Evaluation of hemodynamics effect of extra cranial occlusive disease.

Technique and Protocol - Answers Use appropriate window : start with transtemporal window.

Note the velocity change, flow direction & traceability.

Ultrasonic Windows - Answers 1. Transtemporal

2. Transorbital

, 3. Suboccipital

4. Submandibular

Transtemporal Window - Answers *Anterior orientation: MCA, CS, ACA, ACoA.

*Posterior orientation: PCA , BA, PCoA

FLOW DIRECTION - Answers MCA - TOWARD TRANSDUCER

ACA - AWAY FROM TRANSDUCER

Transorbital Window - Answers Anterior Cerebral Circulation, Ophthalmic artery and CS

FLOW DIRECTION - Answers Ophthalmic artery: toward transducer.



C2: away from transducer

C4: toward the transducer

C3: bidirectional

Suboccipital Window - Answers Vertebral arteries, basilar artery.

FLOW DIRECTION - Answers VA & BA: BOTH AWAY FROM TRANSDUCER

Submandibular Window - Answers Distal ICA

Depth of vessels - Answers MCA: Shallowest

BA : Deepest.

Primary TCD parameters - Answers Insonation depth.

direction of blood flow at that depth.

flow velocities.

site of probe position.

direction of ultrasound beam.

traceability of vessel.

Factors Affecting blood flow velocities - Answers Age : decrease with increasing age.

Gender: 3-5 % higher in male than female.

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