Table 1.
Geometric and hydrodynamic results
| Parameter | Control Avg.a ± std. |
ALS Avg.a ± std. |
|---|---|---|
| Perimeter SC (cm) | 1.87 ± 0.22 | 1.88 ± 0.26 |
| Perimeter DM (cm) | 5.66 ± 0.78 | 5.25 ± 0.83 |
| Perimeter SSS (cm) | 7.53 ± 0.89 | 7.13 ± 0.96 |
| Cross-sectional area SC (cm2) | 0.35 ± 0.07 | 0.35 ± 0.08 |
| Cross-sectional area DM (cm2) | 2.13 ± 0.54 | 1.89 ± 0.49 |
| Cross-sectional area SSS (cm2) | 1.78 ± 0.53 | 1.53 ± 0.48 |
| Volume SC (Vc) (cm3) | 20.99 ± 2.55 | 22.53 ± 2.29 |
| Volume DM (Vd) (cm3) | 129.19 ± 18.67 | 119.83 ± 21.74 |
| Volume SSS (Vcs) (cm3) | 108.20 ± 18.67 | 97.30 ± 20.51 |
| Surface area SC (cm2) | 113.52 ± 7.67 | 119.37 ± 6.59 |
| Surface area DM (cm2) | 344.12 ± 27.30 | 333.54 ± 39.72 |
| Surface area SSS (cm2) | 457.64 ± 29.89 | 452.91 ± 43.82 |
| Hydraulic diameter (cm) | 0.96 ± 0.21 | 0.89 ± 0.21 |
| Reynolds number (cm) | 194.74 ± 80.75 | 209.37 ± 37.34 |
| Womersley number (α) | 12.71 ± 1.48 | 11.92 ± 1.51 |
| Usys (cm/s) | − 1.30 ± 0.34 | − 1.29 ± 0.33 |
| Udia (cm/s) | 0.76 ± 0.30 | 0.70 ± 0.28 |
| Qsys (cm3/s) | − 1.88 ± 0.62 | − 1.58 ± 0.31 |
| Qdia (cm3/s) | 1.06 ± 0.29 | 0.83 ± 0.17 |
| PWV (cm/s) | 347.41 ± 88.13 | 473.19 ± 162.04 |
DM dura matter, PWV pulse wave velocity, SC spinal cord, SSS spinal subarachnoid space, Qdia average diastolic CSF flowrate, Qsys average systolic CSF flowrate, Usys average systolic CSF velocity, Udia average diastolic CSF velocity
aAverage values are based 1 mm slice intervals along the entire spine