Why the study?
What are the normal reference values and age/sex variability for blood flow parameters in basal cerebral arteries measured by transcranial color Doppler sonography in healthy subjects?
What are the normal reference values and age/sex variability for blood flow parameters in basal cerebral arteries measured by transcranial color Doppler sonography in healthy subjects?
Establishes that age and sex matching is a prerequisite for interpreting transcranial Doppler sonographic data due to significant age dependence of flow velocities.
Age-adjusted TCD references may aid interpretation; leaves open prospective validation of sex-specific norms.
Flow velocities in basal cerebral arteries range widely and are significantly age dependent. Age and sex matching of Doppler sonographic data is a prerequisite for clinically valuable conclusions.
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Krejza et al. (1999) studied this question.
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