| DSV - pressure levels |
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The DUALSWITCH VALVE is available in different pressure configurations.
Different pressure settings are available either for the low pressure chamber (horizontal body position of the patient) or the high pressure chamber (vertical body position). The recommended pressure level for the low pressure chamber is dependent on the origin of the hydrocephalus.
The height of the patient, however, is the determining factor when considering the opening pressure required for the high level pressure chamber. |
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Standard
opening pressure
horizontal / vertical
(cmH2O) |
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NPH valve
opening pressure
horizontal / vertical
(cmH2O) |
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| Patients shorter than 1,60 m |
10 / 30 |
5 / 30 |
| Patients from 1,60 m to 1,80 m |
10 / 40 |
5 / 40 |
| Patients taller than 1,80 m |
10 / 50 |
5 / 50 |
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| Reading the pressure setting from an X-ray image |
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Fig. 1 shows the X-ray image of a DUALSWITCH VALVE(pressure setting 13 / 30 cmH2O). The position of the tantalum ball is shown in the enlarged schematic.
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| In addition to the standard pressure settings the DUALSWITCH VALVE is also available in the following special configurations: |
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opening pressure
horizontal / vertical
(cmH2O)
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coding
DUALSWITCH VALVE
in X-ray image |
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opening pressure
horizontal / vertical
(cmH2O) |
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coding
DUALSWITCH VALVE
in X-ray image |
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5 / 30 |
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13 / 30 |
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5 / 40 |
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13 / 40 |
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5 / 50 |
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13 / 50 |
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10 / 30 |
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16 / 30 |
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10 / 40 |
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16 / 40 |
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10 / 50 |
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16 / 50 |
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