Key result
Continuous transcranial Doppler measurements showed significant variations in mean velocity signals, with average peak-to-trough differences of 11% in normal subjects and 14% in patients.
Why the study?
Are there significant periodic variations in transcranial Doppler mean velocities during short time periods in normal subjects and neurosurgical patients?
Population
29 subjects (11 normal subjects and 18 patients with a variety of neurosurgical disorders)
Design
Cross-sectional
Follow-up
5 to 10 minutes
Authors
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TCD velocity fluctuations may confound serial monitoring; leaves open need for standardized protocols in future studies.
Observational (n=29)
Are there significant periodic variations in transcranial Doppler mean velocities during short time periods in normal subjects and neurosurgical patients?
Absolute Event Rate: 14% vs 11%
Significant periodic variations in transcranial Doppler mean velocities occur over short periods, which should be recognized as they may confound the interpretation of serial studies.
Giller et al. (1993) conducted an observational in Neurosurgical disorders (n=29). Continuous transcranial Doppler measurements vs. Normal subjects was evaluated on Average difference between the peak and the trough in the waves. Continuous transcranial Doppler measurements showed significant variations in mean velocity signals, with average peak-to-trough differences of 11% in normal subjects and 14% in patients.
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