Testing a New Hydrocephalus Shunt
Author Information
Author(s): Allin David M, Czosnyka Marek, Richards Hugh K, Pickard John D, Czosnyka Zofia H
Primary Institution: Shunt Evaluation Laboratory & Academic Neurosurgical Unit, Addenbrooke's Hospital, Cambridge, UK
Hypothesis
The study aims to measure the properties of the Polaris valve to provide independent data about its performance.
Conclusion
The Polaris Valve is a reliable, adjustable valve that cannot be accidentally re-adjusted by an external magnetic field.
Supporting Evidence
- The Polaris valve showed good mechanical durability over a 3-month testing period.
- Hydrodynamic resistance varied with the performance level, ranging from 1.6 to 11.2 mmHg/ml/min.
- The valve's programming was unaffected by external magnetic fields up to 3 Tesla.
Takeaway
The Polaris valve is a new device that helps drain fluid from the brain and works well without being affected by strong magnets.
Methodology
The performance and hydrodynamic properties of the Polaris valve were evaluated in a laboratory setting using various pressure and flow tests.
Potential Biases
The study was commissioned by the manufacturer, which may introduce bias.
Limitations
The study was conducted in vitro, and clinical outcomes may differ.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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