Table 1 Hydrodynamic resistance of the opened shunt depends on the preset performance level.
From: Investigation of the hydrodynamic properties of a new MRI-resistant programmable hydrocephalus shunt
Performance level | Shunt without Catheter | Shunt with catheter (110 cm long, internal diameter 1.1 mm) |
|---|---|---|
30 mmH2O 2.3 mmHg | 1.58 (0.3) | 4.61 (.71) |
70 mmH2O 5.2 mmHg | 2.06 (0.41) | 5.12 (0.76) |
110 mmH2O 8.1 mmHg | 2.48 (0.52) | 5.62 (0.82) |
150 mmH2O 11.1 mmHg | 5.18 (0.81) | 8.21 (1.01) |
200 mmH2O 14.7 mmHg | 11.2 (1.31) | 14.2 (1.42) |