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Reproducibility of transcranial Dopplersonography: a validation study
R Totaro1, C Marini, C Cannarsa
1Neurological Department, University of L'Aquila, Italy.
Ultrasound in Medicine & Biology
|January 1, 1992
Summary
Transcranial Doppler-sonography (TCD) offers reproducible intracranial arterial blood flow velocity measurements. This noninvasive technique demonstrates good reliability across multiple arteries, crucial for clinical assessments.
Area of Science:
- Neurosonology
- Vascular Neurology
- Medical Imaging
Background:
- Transcranial Doppler-sonography (TCD) is a noninvasive method for assessing intracranial arterial hemodynamics.
- Evaluating the reproducibility of TCD measurements is essential for its reliable clinical application.
Purpose of the Study:
- To assess the reproducibility of Transcranial Doppler-sonography (TCD) for repeated measurements of blood flow velocity.
- To evaluate TCD reliability in the anterior, middle, and posterior cerebral arteries, and the basilar artery.
Main Methods:
- Thirty-six patients underwent three TCD measurements by the same examiner.
- Measurements were taken with 1-hour and 24-hour intervals between assessments.
- Reproducibility was statistically evaluated using correlation coefficients (r).
Main Results:
- TCD demonstrated good reproducibility for all assessed arteries between repeated measurements (r = 0.78–0.97; p < 0.001).
- The poorest reproducibility was observed in the posterior cerebral artery when middle cerebral artery mean velocity was low (r = 0.42–0.54).
Conclusions:
- Transcranial Doppler-sonography exhibits good reproducibility for intracranial arterial blood flow velocity measurements.
- Clinical application of TCD is supported by its reliable performance, with a note on potential variability in specific low-flow conditions.