Table 4.
Doppler and Trephined
| Pre-surgery | Post-surgery | |||||
|---|---|---|---|---|---|---|
| Trephined | Trephined | |||||
| Yes | No | p value | Yes | No | p value | |
| MCA Sitting cm/sec | MCA sitting, defect | |||||
| Systolic | 76.30 | 68.65 | 66.42 | 62.98 | ||
| Dyastolic | 29.67 | 24.72 | 25.40 | 25.13 | ||
| Mean | 46.78 | 40.59 | 38.21 | 38.21 | ||
| MCA Supine cm/sec | MCA supine, defect | |||||
| Systolic | 54.40 | 73.86 | 62.43 | 56.92 | ||
| Dyastolic | 24.18 | 28.58 | 24.26 | 22.46 | ||
| Mean | 35.28 | 43.47 | 36.97 | 35.06 | ||
| ICA sitting cm/sec | ICA sitting, defect | |||||
| Systolic | 32.88 | 56.85 | 0.008 | 37.98 | 41.16 | |
| Dyastolic | 8.13 | 12.65 | 0.024 | 10.50 | 10.44 | |
| Mean | 14.37 | 24.22 | 0.007 | 16.86 | 18.61 | |
| ICA Supine cm/sec | ICA supine, defect | |||||
| Systolic | 38.79 | 36.89 | 37.98 | 41.16 | ||
| Dyastolic | 10.40 | 9.45 | 10.50 | 10.44 | ||
| Mean | 17.26 | 16.53 | 16.86 | 18.61 | ||
| LR | Lindegaard index, defect | |||||
| Sitting | 3.692 | 2.242 | 0.029 | 2.454 | 2.439 | |
| Supine | 2.397 | 2.957 | 2.413 | 2.358 | ||
| ΔLR(sitting-supine) | 1.295 | −0.714 | 0.002 | 0.041 | 0.080 | |
| Pre-surgery | Post-surgery | |||||
|---|---|---|---|---|---|---|
| Trephined | Trephined | |||||
| Yes | No | P value | Yes | No | P value | |
| MCA Sitting cm/sec | MCA sitting, healthy | |||||
| Systolic | 73.29 | 56.81 | 72.26 | 78.03 | ||
| Dyastolic | 30.94 | 19.89 | 29.05 | 30.55 | ||
| Mean | 45.80 | 33.37 | 41.24 | 46.00 | ||
| MCA Supine cm/sec | MCA supine, healthy | |||||
| Systolic | 65.42 | 74.29 | 62.15 | 69.55 | ||
| Dyastolic | 27.45 | 30.48 | 24.89 | 26.47 | ||
| Mean | 39.77 | 45.79 | 36.09 | 41.97 | ||
| ICA sitting cm/sec | ICA sitting, healthy | |||||
| Systolic | 34.66 | 54.47 | 37.20 | 42.00 | ||
| Dyastolic | 10.64 | 13.42 | 9.91 | 10.84 | ||
| Mean | 17.54 | 24.16 | 17.00 | 19.01 | ||
| ICA Supine cm/sec | ICA supine, healthy | |||||
| Systolic | 30.96 | 41.02 | 0.069 | 33.75 | 46.05 | |
| Dyastolic | 9.90 | 11.47 | 9.52 | 10.78 | ||
| Mean | 15.45 | 20.04 | 16.07 | 20.44 | ||
| LR | Lindegaard index, healthy | |||||
| Sitting | 2.797 | 1.715 | 2.941 | 1.815 | ||
| Supine | 3.032 | 2.853 | 2.558 | 2.479 | ||
| ΔLR(sitting-supine) | −0.235 | −1.138 | 0.472 | −0.664 | ||
Student's t-test was applied to compare patients who improved with those who did not (i.e., trephined yes or no). The LR varied greatly when moving from sitting to supine in the defective side of patients who showed improvement, but there was little to no variation after the surgery. This is primarily due to a lower ICA velocity in the sitting position in patients who showed improvement. When Student's t-test resulted in a p value greater than 0.08, the box was left blank.
MCA, middle cerebral artery; ICA, internal carotid artery; LR, Lindegaard ratio.