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Table 2 Summary of geometric and hydrodynamic parameters obtained from the final 3D spine model

From: A 3D subject-specific model of the spinal subarachnoid space with anatomically realistic ventral and dorsal spinal cord nerve rootlets

Parameter Average ± std. Maximum Minimum
Perimeter SCa (cm) 1.85 ± 1.00  4.62 0.14
Perimeter DM (cm) 5.26 ± 1.01 11.59 1.25
Perimeter NR (cm) 3.84 ± 2.81 10.08 0.00
Perimeter SSS (cm) 10.96 ± 3.12 19.91 1.6
Area SCa (cm2) 0.33 ± 0.23 1.34 0.00
Area DM (cm2) 2.03 ± 0.79 6.95 0.04
Area NR (cm2) 0.10 ± 0.08 0.28 0.00
Area SSS (cm2) 1.61 ± 0.65 5.62 0.04
Hydraulic diameter HD (cm) 0.59 ± 0.14 1.40 0.10
Re 68.46 ± 39.00 174.9 0.00
α 9.59 ± 2.27 22.96 1.64
Usys (cm/s) − 0.83 ± 0.51 N/A − 2.16
Udia (cm/s) 0.83 ± 0.34 1.47 N/A
Qsys (cm3/s) − 1.29 ± 0.87 N/A − 3.44
Qdia (cm3/s) 1.22 ± 0.39 1.69 N/A
PWV (cm/s) 19.4  N/A N/A
  1. aAverage, maximum and minimum values are based 1 mm slice intervals along the entire spine including the coccygeal nerve