Review Article
Transcranial Doppler Ultrasound: A Review of the Physical Principles and Major Applications in Critical Care
Table 3
Grading of vasospasm severity [
31,
32].
| | Degree of MCA or ICA vasospasm | MFV (cm/s) | | LR |
| | Mild (<25%) | 120–149 | A
N
D | 3–6 | | Moderate (25–50%) | 150–199 | 3–6 | | Severe (>50%) | >200 | >6 |
| | Degree of BA vasospasm | MFV (cm/s) | | Modified LR |
| | May represent vasospasm | 70–85 | A
N
D | 2–2.49 | | Moderate (25–50%) | >85 | 2.5–2.99 | | Severe (>50%) | >85 | >3 |
|
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