Confirmatory Rule Out Test
- Clinical signs suggest shunt obstruction is unlikely
- ShuntCheck “Flow Confirmed” result confirms this clinical judgment
![](https://neurodx.com/wp-content/uploads/2017/07/Confirmatory-Rule-Out-Test-Page-Resized-shutterstock_399077320.jpg)
Clarify the More Complex Cases
- ShuntCheck results can confirm Imaging results – this is especially valuable when Imaging results are somewhat equivocal
- ShuntCheck “Flow Confirmed” plus Imaging “Normal” or “Decreased” improves Rule Out accuracy (Negative Predictive Value, NPV) over Imaging alone
- ShuntCheck “Flow Not Confirmed” plus Imaging “Enlarged” improves Rule In accuracy (Positive Predictive Value, PPV) over Imaging alone
![](https://neurodx.com/wp-content/uploads/2017/07/Clarify-Complex-Cases-Page-Resized-shutterstock_107615549.jpg)
Manage Broken or Disconnected Catheters
- Asymptomatic patient or normal imaging but x-ray shows broken/disconnected catheter
- A ShuntCheck finding of “Flow Confirmed” would indicate shunt dependency and a flow path around the disconnection.
- But ShuntCheck “Flow Not Confirmed” might suggest a level of shunt independency warranting repeat testing and further evaluation
![](https://neurodx.com/wp-content/uploads/2017/07/Broken-Catheter-Resized-shutterstock_148501625.jpg)