Last Updated: April 17, 2021
The layout of this chapter is broken down by the manufacturer of the shunt, listed in alphabetical order. Images of each shunt valve on standard radiography are provided. Images showing the various shunt settings are also available for reference.
The valve settings for this unit numerically correspond to the associated opening pressure.
The valve settings for this unit numerically correspond to the associated opening pressure.
The valve settings for this unit numerically correspond to the associated opening pressure when not combined with a differential pressure unit in the shunt system.
| Valve Setting | Opening Pressure Setting (cm H2O) |
| 1 | 2.0–2.5 |
| 2 | 4.4–5.5 |
| 3 | 7.5–8.0 |
| 4 | 11–12 |
| 5 | 14–14.5 |
| 6 | 17–18 |
| 7 | 21–22.5 |
| 8 | >40 |
The valve settings for this unit numerically correspond to the associated opening pressure.
| Valve Setting | Opening Pressure Setting (cm H2O) |
| Low-Low Pressure | 1 |
| Low Pressure | 3 |
| Medium Pressure | 8.5 |
| High Pressure | 14.5 |
| Valve Setting | Opening Pressure (cm H2O) | |
| Lying | Standing | |
| 0.5 | 1.5 | 3.0 |
| 1.0 | 3.5 | 5.0 |
| 1.5 | 7.0 | 8.5 |
| 2.0 | 10.5 | 12.0 |
| Valve Setting | Opening Pressure (cm H2O) | |
| Lying | Standing | |
| 0.5 | 1.5 | 3.0 |
| 1.0 | 3.5 | 5.0 |
| 1.5 | 7.0 | 8.5 |
| 2.0 | 10.5 | 12.0 |
| 2.5 | 13.5 | 14.7 |
| Valve Setting | Opening Pressure (cm H2O) |
| 0.5 | 1.5 |
| 1.0 | 3.5 |
| 1.5 | 9.0 |
| 2.0 | 14.5 |
| 2.5 | 20.0 |
| Valve Setting | Opening Pressure (cm H2O) |
| 0.5 | 1.5 |
| 1.0 | 3.5 |
| 1.5 | 9.0 |
| 2.0 | 14.5 |
| Models | SPV-140 | SPV | SPV-300 | SPV-400 | |
|
Pressure Setting Dots (mm H2O) |
Position 1 | 10 | 30 | 50 | 80 |
| Position 2 | 40 | 70 | 100 | 150 | |
| Position 3 | 80 | 110 | 150 | 230 | |
| Position 4 | 110 | 150 | 220 | 330 | |
| Position 5 | 140 | 200 | 300 | 400 | |
For additional examples of the appearance of a variety of shunt valves on imaging, please see "Imaging Appearances of Programmable Ventricular Shunt Systems: What the Radiologist Needs To Know."
Contributor: Benjamin K. Hendricks, MD
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