Single Valve - valve introduction
- Silicone dome with two cross slits
- Slit depth determines flow resistance
- Polysulfone casing protects valve mechanism from effects of tissue encapsulation
- Casing also resists deformation, ensuring reliable valve performance
Single Valve Performance - Pressure/flow chart
Single valve is a differential pressure valve with progressive opening. It opens progressively, even at the lowest pressures.
Single valve demonstrates a level of resistance close to the physiological resistance to CSF outflow(1), helping to fight risks of siphoning.
Direct X-ray identification of the operating pressure is possible thanks to radiopaque dots on the valve.