Table 4. Recommended comparative values for the interpretation of TCD examinations in children (0–18 y) in the pediatric intensive care unit by age (mean [SD]) 2 10 .
| Age | MCA | ICA | ACA | PCA | BA |
|---|---|---|---|---|---|
| Systolic peak velocity: | |||||
| 0–10 d | 46 (10) | 47 (9) | 35 (8) | – | – |
| 11–90 d | 75 (15) | 77 (19) | 58 (15) | – | – |
| 3–11.9 mo | 114 (20) | 104 (12) | 77 (15) | – | – |
| 1–2.9 y | 124 (10) | 118 (24) | 81 (19) | 69 (9) | 71 (6) |
| 3–5.9 y | 147 (17) | 144 (19) | 104 (22) | 81 (16) | 88 (9) |
| 6–9.9 y | 143 (13) | 140 (14) | 100 (20) | 75 (10) | 85 (17) |
| 10–18 y | 129 (17) | 125 (18) | 92 (19) | 66 (10) | 68 (11) |
| Mean flow velocity a : | |||||
| 0–10 d | 24 (7) | 25 (6) | 19 (6) | – | – |
| 11–90 d | 42 (10) | 43 (12) | 33 (11) | – | – |
| 3–11.9 mo | 74 (14) | 67 (10) | 50 (11) | – | – |
| 1–2.9 y | 85 (10) | 81 (8) | 55 (13) | 50 (12) | 51 (6) |
| 3–5.9 y | 94 (10) | 93 (9) | 71 (15) | 48 (11) | 58 (6) |
| 6–9.9 y | 97 (9) | 93 (9) | 65 (13) | 51 (9) | 58 (9) |
| 10–18 y | 81 (11) | 79 (12) | 56 (14) | 45 (9) | 46 (8) |
| End-diastolic peak velocity: | |||||
| 0–10 d | 12 (7) | 12 (6) | 10 (6) | – | – |
| 11–90 d | 24 (8) | 24 (8) | 19 (9) | – | – |
| 3–11.9 mo | 46 (9) | 40 (8) | 33 (7) | – | – |
| 1–2.9 y | 65 (11) | 58 (5) | 40 (11) | 35 (7) | 35 (6) |
| 3–5.9 y | 65 (9) | 66 (8) | 48 (9) | 35 (9) | 41 (5) |
| 6–9.9 y | 72 (9) | 68 (10) | 51 (10) | 38 (7) | 44 (8) |
| 10–18 y | 60 (8) | 59 (9) | 46 (11) | 33 (7) | 36 (7) |
Abbreviations: ACA, anterior cerebral artery; BA, basilar artery; ICA, internal carotid artery; MCA, middle cerebral artery; PCA, posterior cerebral artery; SD, standard deviation; TCD, transcranial Doppler ultrasonography.
a
Mean flow velocity = time mean of the maximal velocity envelope curve.