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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