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Comparison of True Versus Measured Peak Systolic Velocity (PSV) by Carotid Artery Segment.
| Common Carotid | Internal Carotid | External Carotid | Pa | |
|---|---|---|---|---|
| Number of measurements | 16 | 10 | 10 | |
| Mean absolute deviation % | 6 ± 6 | 9 ± 6 | 8 ± 4 | NS |
| True PSV, cm/s | 104 ± 34 | 115 ± 49 | 120 ± 54 | |
| Measured PSV, cm/s | 98 ± 35 | 108 ± 41 | 125 ± 62 | |
| Pb | .001 | NS | NS |
Abbreviation: NS, not significant.
Analysis of variance, difference between artery segments.
Paired t test, true versus measured velocity.
