| Total | REF | iNPH | cHC | SIH | AC | PC | IIH |
---|---|---|---|---|---|---|---|---|
Total (N) | 85 | 23 | 32 | 5 | 4 | 7 | 11 | 3 |
Direction-independent flow | Â | Â | Â | Â | Â | Â | Â | Â |
dP (mmHg/cm) | 0.079 ± 0.035 | 0.068 ± 0.029 | 0.097 ± 0.035b | 0.064 ± 0.020 | 0.060 ± 0.063 | 0.091 ± 0.034 | 0.056 ± 0.020 | 0.072 ± 0.025 |
Total flow/cycle (ml) | 0.145 ± 0.175 | 0.067 ± 0.057 | 0.269 ± 0.223c | 0.077 ± 0.038 | 0.058 ± 0.054 | 0.140 ± 0.129a | 0.041 ± 0.023 | 0.052 ± 0.013 |
Absolute net flow (ml/cycle) | 0.008 ± 0.013 | 0.004 ± 0.002 | 0.011 ± 0.012b | 0.003 ± 0.002 | 0.011 ± 0.017a | 0.018 ± 0.031a | 0.004 ± 0.004 | 0.007 ± 0.011 |
Estimated absolute net flow (L/24 h) | 0.790 ± 1.217 | 0.382 ± 0.232 | 1.087 ± 1.226b | 0.236 ± 0.143 | 1.127 ± 1.659a | 1.650 ± 2.836a | 0.330 ± 0.374 | 0.916 ± 1.117a |
Antegrade-directed net CSF flow | Â | Â | Â | Â | Â | Â | Â | Â |
 N (%) | 59 (69%) | 19 (83%) | 18 (56%)a | 2 (40%)a | 3 (75%) | 5 (71%) | 10 (91%) | 2 (67%) |
 Volume (ml/cycle) | 0.007 ± 0.010 | 0.004 ± 0.002 | 0.012 ± 0.014a | 0.003 ± 0.000 | 0.014 ± 0.019a | 0.007 ± 0.005a | 0.003 ± 0.002 | 0.001 ± 0.000 |
 Estimated volume (L/24 h) | 0.681 ± 0.971 | 0.417 ± 0.234 | 1.181 ± 1.432a | 0.223 ± 0.029 | 1.408 ± 1.911a | 0.698 ± 0.519 | 0.225 ± 0.149a | 0.280 ± 0.261 |
Retrograde-directed net CSF flow | Â | Â | Â | Â | Â | Â | Â | Â |
 N (%) | 26 (31%) | 4 (17%) | 14 (44%) | 3 (60%) | 1 (25%) | 2 (29%) | 1 (9%) | 1 (33%) |
 Volume (ml/cycle) | 0.011 ± 0.018 | 0.002 ± 0.002 | 0.010 ± 0.010 | 0.002 ± 0.002 | 0.003 | 0.044 ± 0.061 | 0.013 | 0.020 |
 Estimated volume (L/24 h) | 1.039 ± 1.642 | 0.215 ± 0.146 | 0.966 ± 0.935 | 0.245 ± 0.201 | 0.283 | 4.031 ± 5.595 | 1.374 | 2.189 |
Other variables | Â | Â | Â | Â | Â | Â | Â | Â |
 ROI (cm2) | 0.049 ± 0.039 | 0.028 ± 0.010 | 0.083 ± 0.043c | 0.034 ± 0.015 | 0.029 ± 0.012 | 0.041 ± 0.022a | 0.021 ± 0.007a | 0.028 ± 0.010 |
 SNR | 19.894 ± 3.700 | 19.145 ± 4.144 | 20.691 ± 2.573 | 20.484 ± 2.189 | 16.739 ± 6.800 | 22.080 ± 4.692 | 19.088 ± 3.900 | 18.225 ± 0.701 |
 Min velocity (cm/s) | -5.273 ± 2.437 | -4.455 ± 1.892 | -6.465 ± 2.468b | -4.623 ± 1.667 | -5.140 ± 5.284 | -6.209 ± 1.533a | -3.783 ± 1.335 | -3.381 ± 0.403 |
 Max velocity (cm/s) | 4.075 ± 1.840 | 3.689 ± 1.923 | 4.771 ± 1.594a | 3.522 ± 1.096 | 2.291 ± 1.468 | 4.828 ± 2.616 | 3.309 ± 1.289 | 3.963 ± 2.422 |